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Processing Microstructure And Mechanical Properties Of An Advanced Nickel Base Powder Metallurgy Superalloy
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Book Synopsis Processing, Microstructure and Mechanical Properties of an Advanced Nickel Base Powder Metallurgy Superalloy : by : James Richard May
Download or read book Processing, Microstructure and Mechanical Properties of an Advanced Nickel Base Powder Metallurgy Superalloy : written by James Richard May and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of a Supersolvus Heat Treatment on the Microstructure and Mechanical Properties of a Powder Metallurgy Processed Nickel-base Superalloy by : Darryl Slade Stolz
Download or read book Effect of a Supersolvus Heat Treatment on the Microstructure and Mechanical Properties of a Powder Metallurgy Processed Nickel-base Superalloy written by Darryl Slade Stolz and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This is thought to be due to the larger amounts of tertiary [gamma]ʹ present in the microstructure produced by the standard heat treatment. Finally, the standard heat treatment had longer creep lifetimes at the lowest test temperature. The alternate heat treatment performed better at the higher test temperatures. While the microstructure did not improve the fatigue properties across the board, the improved understanding of the microstructural evolution during heat treatment will help in developing new heat treatments that may provide the defect-tolerance that is necessary.
Book Synopsis Advanced High-temperature Alloys by : Samuel M. Allen
Download or read book Advanced High-temperature Alloys written by Samuel M. Allen and published by ASM International(OH). This book was released on 1986 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Alloy Design and Characterization of γ′ Strengthened Nickel-based Superalloys for Additive Manufacturing by : Jinghao Xu
Download or read book Alloy Design and Characterization of γ′ Strengthened Nickel-based Superalloys for Additive Manufacturing written by Jinghao Xu and published by Linköping University Electronic Press. This book was released on 2021-01-28 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nickel-based superalloys, an alloy system bases on nickel as the matrix element with the addition of up to 10 more alloying elements including chromium, aluminum, cobalt, tungsten, molybdenum, titanium, and so on. Through the development and improvement of nickel-based superalloys in the past century, they are well proved to show excellent performance at the elevated service temperature. Owing to the combination of extraordinary high-temperature mechanical properties, such as monotonic and cyclic deformation resistance, fatigue crack propagation resistance; and high-temperature chemical properties, such as corrosion and oxidation resistance, phase stability, nickel-based superalloys are widely used in the critical hot-section components in aerospace and energy generation industries. The success of nickel-based superalloy systems attributes to both the well-tailored microstructures with the assistance of carefully doped alloying elements, and the intently developed manufacturing processes. The microstructure of the modern nickel-based superalloys consists of a two-phase configuration: the intermetallic precipitates (Ni,Co)3(Al,Ti,Ta) known as γ′ phase dispersed into the austenite γ matrix, which is firstly introduced in the 1940s. The recently developed additive manufacturing (AM) techniques, acting as the disruptive manufacturing process, offers a new avenue for producing the nickel-based superalloy components with complicated geometries. However, γ′ strengthened nickel-based superalloys always suffer from the micro-cracking during the AM process, which is barely eliminated by the process optimization. On this basis, the new compositions of γ′ strengthened nickel-based superalloy adapted to the AM process are of great interest and significance. This study sought to design novel γ′ strengthened nickel-based superalloys readily for AM process with limited cracking susceptibility, based on the understanding of the cracking mechanisms. A two-parameter model is developed to predict the additive manufacturability for any given composition of a nickel-based superalloy. One materials index is derived from the comparison of the deformation-resistant capacity between dendritic and interdendritic regions, while another index is derived from the difference of heat resistant capacity of these two spaces. By plotting the additive manufacturability diagram, the superalloys family can be categorized into the easy-to-weld, fairly-weldable, and non-weldable regime with the good agreement of the existed knowledge. To design a novel superalloy, a Cr-Co-Mo-W-Al-Ti-Ta-Nb-Fe-Ni alloy family is proposed containing 921,600 composition recipes in total. Through the examination of additive manufacturability, undesired phase formation propensity, and the precipitation fraction, one composition of superalloy, MAD542, out of the 921,600 candidates is selected. Validation of additive manufacturability of MAD542 is carried out by laser powder bed fusion (LPBF). By optimizing the LPBF process parameters, the crack-free MAD542 part is achieved. In addition, the MAD542 superalloy shows great resistance to the post-processing treatment-induced cracking. During the post-processing treatment, extensive annealing twins are promoted to achieve the recrystallization microstructure, ensuring the rapid reduction of stored energy. After ageing treatment, up to 60-65% volume fraction of γ′ precipitates are developed, indicating the huge potential of γ′ formation. Examined by the high-temperature slow strain rate tensile and constant loading creep testing, the MAD542 superalloy shows superior strength than the LPBF processed and hot isostatic pressed plus heat-treated IN738LC superalloy. While the low ductility of MAD542 is existed, which is expected to be improved by modifying the post-processing treatment scenarios and by the adjusting building direction in the following stages of the Ph.D. research. MAD542 superalloy so far shows both good additive manufacturability and mechanical potentials. Additionally, the results in this study will contribute to a novel paradigm for alloy design and encourage more γ′-strengthened nickel-based superalloys tailored for AM processes in the future.
Book Synopsis On the Path-dependent Microstructure Evolution of an Advanced Powder Metallurgy Nickel-base Superalloy During Heat Treatment by : Nicholas J. Krutz
Download or read book On the Path-dependent Microstructure Evolution of an Advanced Powder Metallurgy Nickel-base Superalloy During Heat Treatment written by Nicholas J. Krutz and published by . This book was released on 2020 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: The realization of advanced alloy compositions in service relies on a thorough understanding of metallurgical processing variables. Within this work, the gamma prime precipitation of an advanced powder metallurgy nickel-base superalloy during controlled cooling from supersolvus temperatures is compared to prior alloy generations using a complement of characterization and modeling approaches. The on-cooling precipitation of the alloy is studied and characterized to calibrate a multi-scale precipitation model. The proposed framework incorporates a computationally efficient addition to the mean-field modeling approach that increases its ability to model dynamic, multi-modal gamma prime burst events. The gamma prime size predicted by the model shows good agreement with experimental results. The precipitation calculation is applied to the element integration points of a continuum Finite Element heat conduction simulation, where the latent heat generated from the precipitation is accounted for. The results are compared to experimental findings and indicate potential use of the model for evaluating precipitation effects at multiple length scales. The lattice misfit evolution of two commercial PM nickel superalloys during cooling from supersolvus temperatures is also characterized, using in-situ synchrotron X-Ray Diffraction (XRD). The diffraction pattern deconvolution necessary for quantifying misfit was accomplished by combining observation of the superlattice peak intensities with thermodynamic modeling to quantify the intensity relationship between the overlapping phases. The misfit from the XRD measurements was compared to the Scanning Electron Microscopy observations of gamma prime particle shapes for a subset of the experimental conditions. The trend of measured misfit agreed with the microstructural characterization. Time-resolved observations of the on-cooling lattice parameter suggest that lower-temperature changes to the peak intensity characteristics coincide with low misfit magnitudes and a plausible connection to gamma prime burst events. Variation in cooling rate for this alloy and its predecessors shows a tendency for unstable precipitate growth with slower rates. To better understand the effect of precipitate morphology on defect interaction, a series of lab heat treatments of varied cooling rates were carried out and the mechanical response characterized. A phase-field based approach is used to simulate the growth instability of gamma prime precipitates during cooling and compared to post-mortem characterization using serial sectioning and reconstruction. Phase-field modeling is then used to interrogate the interaction of the particle morphology with planar dislocation evolution. It was determined that the incipient stages of particle evolution are dictated by interface growth instability more so than elastic anisotropy effects. Planar deformation in the presence of more evolved particles tended to promote Orowan looping while smaller particles with smaller gamma channel widths showed a tendency for stacking fault formation under the conditions characterized. To further understand precipitate morphology on properties, a stand-alone spectral-based microelasticity model is employed to predict the stress field around the particles. First order deformation assumptions are assessed to understand the effect of the microelastic stress field interacting with dislocations. By comparing the fields of varied precipitate morphologies, it is observed that the magnitudes and spatial distribution of the stress tensor components vary by morphology and may contribute to differences from a defect interaction standpoint.
Book Synopsis Nickel, Cobalt, and Their Alloys by : Joseph R. Davis
Download or read book Nickel, Cobalt, and Their Alloys written by Joseph R. Davis and published by ASM International. This book was released on 2000-01-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive guide to the compositions, properties, processing, performance, and applications of nickel, cobalt, and their alloys. It includes all of the essential information contained in the ASM Handbook series, as well as new or updated coverage in many areas in the nickel, cobalt, and related industries.
Download or read book Superalloys 2012 written by Eric S. Huron and published by John Wiley & Sons. This book was released on 2012-10-02 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt: A superalloy, or high-performance alloy, is an alloy that exhibits excellent mechanical strength at high temperatures. Superalloy development has been driven primarily by the aerospace and power industries. This compilation of papers from the Twelfth International Symposium on Superalloys, held from September 9-13, 2012, offers the most recent technical information on this class of materials.
Book Synopsis Titanium Powder Metallurgy by : Ma Qian
Download or read book Titanium Powder Metallurgy written by Ma Qian and published by Butterworth-Heinemann. This book was released on 2015-02-10 with total page 649 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium Powder Metallurgy contains the most comprehensive and authoritative information for, and understanding of, all key issues of titanium powder metallurgy (Ti PM). It summarizes the past, reviews the present and discusses the future of the science and technology of Ti PM while providing the world titanium community with a unique and comprehensive book covering all important aspects of titanium powder metallurgy, including powder production, powder processing, green shape formation, consolidation, property evaluation, current industrial applications and future developments. It documents the fundamental understanding and technological developments achieved since 1937 and demonstrates why powder metallurgy now offers a cost-effective approach to the near net or net shape fabrication of titanium, titanium alloys and titanium metal matrix composites for a wide variety of industrial applications. Provides a comprehensive and in-depth treatment of the science, technology and industrial practice of titanium powder metallurgy Each chapter is delivered by the most knowledgeable expert on the topic, half from industry and half from academia, including several pioneers in the field, representing our current knowledge base of Ti PM. Includes a critical review of the current key fundamental and technical issues of Ti PM. Fills a critical knowledge gap in powder metal science and engineering and in the manufacture of titanium metal and alloys
Download or read book The Superalloys written by Roger C. Reed and published by Cambridge University Press. This book was released on 2008-07-31 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superalloys are unique high-temperature materials used in gas turbine engines, which display excellent resistance to mechanical and chemical degradation. This book introduces the metallurgical principles which have guided their development. Suitable for graduate students and researchers, it includes exercises and additional resources at www.cambridge.org/9780521859042.
Book Synopsis Application of Powder Metallurgy to an Advanced-temperature Nickel-base Alloy NASA-TRW VI-A by : John C. Freche
Download or read book Application of Powder Metallurgy to an Advanced-temperature Nickel-base Alloy NASA-TRW VI-A written by John C. Freche and published by . This book was released on 1971 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Additive Manufacturing of High-Performance Metallic Materials by : Robert Pederson
Download or read book Additive Manufacturing of High-Performance Metallic Materials written by Robert Pederson and published by Elsevier. This book was released on 2023-09-19 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive Manufacturing of High-Performance Metallic Materials outlines the state-of-the-art on AM in high performance materials utilizing the two most industrially interesting routes of powder bed fusion (PBF) and directed energy deposition (DED). The book delves into Feedstock, Processing, Monitoring and control, Modeling and simulation, and Surface and thermal post-treatments. It specifically addresses materials and the most relevant and high performance applications, namely Ni-based alloys and Titanium alloys, and also provides insights into potential applications through illustrative case studies. With each chapter contributed by experts in the field, this work will serve as a comprehensive resource for graduate students and practitioners alike. Covers the entire value chain relevant to additive manufacturing spanning feedstock, processing, monitoring, post-treatment, testing and applications Includes the fundamental understanding of varied associated aspects derived from both extensive experimental knowledge and theoretical investigations Addresses key materials relevant to varied high performance applications, namely Superalloys and Ni-based alloys
Book Synopsis Ni-Based Superalloys by : James Coakley
Download or read book Ni-Based Superalloys written by James Coakley and published by Trans Tech Publications Ltd. This book was released on 2020-07-28 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aggregated Book
Book Synopsis Microstructure and Mechanical Properties of Nickel-based Superalloy Hastelloy X Fabricated by Laser Powder Bed Fusion by : Oscar Sanchez Mata
Download or read book Microstructure and Mechanical Properties of Nickel-based Superalloy Hastelloy X Fabricated by Laser Powder Bed Fusion written by Oscar Sanchez Mata and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Additive manufacturing (AM), particularly laser powder bed fusion (LPBF) has been used to process Ni-based superalloys as an alternative to traditional manufacturing methods. However, they can be prone to cracking when fabricated through LPBF. Hastelloy X (HX) is a solid solution strengthened (SSS) alloy that although being categorized as readily weldable, suffers from cracking during LPBF. This document presents a study of crack-free LPBF HX microstructures, their behaviour after post-processing and their relationship with mechanical properties. Moreover, the application of unique microstructural features that result from LPBF processing to scale from bulk to more complex parts and tailor mechanical properties is documented. Crack-free HX fabricated through LPBF from powder having a standard chemical composition is reported. Electron backscatter diffraction (EBSD) analysis evidenced columnar grains parallel to the building direction (BD). The columnar sub-grain solidification microstructure was found to be finer than reported elsewhere. Mo-enriched carbides (~50 nm), were identified along interdendritic regions. The crack-free condition was maintained after heat treatment at 1177 °C for 1 h and its microstructure was analyzed. Dense and crack-free specimens were printed in both horizontal and vertical orientations. Samples were analyzed in as-built (AB), hot isostatic pressing treatment (HIP), and conventional heat treatment (HT) conditions. Tensile testing was done at room and elevated temperature (RT, ET = 750°C). AB samples showed columnar grains and a partial fiber texture aligned with the BD, which was reduced after HIP and HT. Mo and Cr carbides were found at RT which grew after ET. AB samples displayed high ultimate tensile strength (UTS) up to 924 ± 10 MPa, while strength values remained close to a reference HX wrought alloy after HIP and HT. Although lower ductility was observed for AB samples at ET, elongation was improved after HIP and HT. Strength and elongation comparable to that of the wrought alloy at RT can be obtained by only performing conventional HT, without the need of HIP. Dense and crack-free LPBF HX thin cylindrical struts with diameters from 0.25 to 2 mm were built. Their crystallographic texture transitioned from a 110 || BD fiber texture (2 mm), to a single crystal 110 || BD (0.25 mm). The size of cellular sub-grain microstructure increased as strut diameter decreased and was linked with an inverse trend in microhardness, which was the highest in the 2 mm strut due to a smaller cell size. Lower hardness in regions close to the strut edges was also related to a larger observed cell size. From tensile testing, elongation was measured at 35-50%. Deformation twinning and lattice rotation after testing were observed. Differences in strength between struts of different diameter were discussed. Fractography analysis confirmed the ductile fracture behavior. Finally, the unique strong crystallographic texture behaviour of LPBF HX was studied in more detail. Tensile properties at RT were investigated along the 100, 110, and 111 crystallographic orientations. Tensile behavior was highly dependent on crystallographic orientation and showed a good combination of strength and ductility when compared with other LPBF HX. EBSD analysis after fracture revealed deformation twinning in 110 and 111 samples, but not in 100. Crystallographic orientation had an impact on the effective stacking fault energies and on the critical stress for deformation twinning. The latter was near or below the yield strength (YS) value for 110 and 111, while it was above the UTS of the 100 orientation. The YS value of 111 (807 ± 28 MPa) was higher than for 100 (693 ± 8 MPa) and 110 (648 ± 13 MPa). Results suggest that deformation twinning can occur in SSS Ni-based superalloys at RT. In contrast to the 100 and 111 orientations, rotation of the lattice after deformation was found for the 110 direction"--
Book Synopsis Proceedings of the 10th International Symposium on Superalloy 718 and Derivatives by : Eric A. Ott
Download or read book Proceedings of the 10th International Symposium on Superalloy 718 and Derivatives written by Eric A. Ott and published by Springer Nature. This book was released on 2023-04-20 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection explores all aspects of metallurgical processing, materials behavior, and microstructural performance for the distinct class of 718-type superalloys and derivatives. Technical topics focus on alloy and process development, production, product applications, trends, and the development of advanced modeling tools. New developments in R&D, new processing methods, 3D printing, and other nontraditional applications also are covered.
Download or read book Superalloys 2020 written by Sammy Tin and published by Springer Nature. This book was released on 2020-08-28 with total page 1098 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14th International Symposium on Superalloys (Superalloys 2020) highlights technologies for lifecycle improvement of superalloys. In addition to the traditional focus areas of alloy development, processing, mechanical behavior, coatings, and environmental effects, this volume includes contributions from academia, supply chain, and product-user members of the superalloy community that highlight technologies that contribute to improving manufacturability, affordability, life prediction, and performance of superalloys.
Book Synopsis Superalloys by : Matthew J. Donachie
Download or read book Superalloys written by Matthew J. Donachie and published by ASM International. This book was released on 2002 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers virtually all technical aspects related to the selection, processing, use, and analysis of superalloys. The text of this new second edition has been completely revised and expanded with many new figures and tables added. In developing this new edition, the focus has been on providing comprehensive and practical coverage of superalloys technology. Some highlights include the most complete and up-to-date presentation available on alloy melting. Coverage of alloy selection provides many tips and guidelines that the reader can use in identifying an appropriate alloy for a specific application. The relation of properties and microstructure is covered in more detail than in previous books.
Book Synopsis Superalloys 2024 by : Jonathan Cormier
Download or read book Superalloys 2024 written by Jonathan Cormier and published by Springer Nature. This book was released on with total page 1121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
