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Investigation Of The Strain Hardening Behaviour Of Modern Lightweight Steels Considering The Forming Temperature And Forming Rate
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Book Synopsis Investigation of the Strain-hardening Behaviour of Modern Lightweight Steels Considering the Forming Temperature and Forming Rate by : A. Bäumer
Download or read book Investigation of the Strain-hardening Behaviour of Modern Lightweight Steels Considering the Forming Temperature and Forming Rate written by A. Bäumer and published by . This book was released on 2008 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modelling Hot Deformation of Steels by : John G. Lenard
Download or read book Modelling Hot Deformation of Steels written by John G. Lenard and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer Aided Engineering may be defined as an approach to solving tech nological problems in which most or all of the steps involved are automated through the use of computers, data bases and mathematical models. The success of this ap proach, considering hot forming, is tied very directly to an understanding of material behaviour when subjected to deformation at high temperatures. There is general agreement among engineers that not enough is known about that topic -and this gave the initial impetus for the project described in the present study. The authors secured a research grant from NATO (Special Research Grant #390/83) with a mandate to study the "State-of-the-Art of Controlled Rolling". What follows is the result of that study. There are five chapters in this Monograph. The first one, entitled "State-of-the Art of Controlled Rolling" discusses industrial and laboratory practices and research designed to aid in the development of microalloyed steels of superior quality. Follow ing this is the chapter "Methods of Determining Stress-Strain Curves at Elevated Temperatures". The central concern here is the material's resistance to deformation or in other words, its flow strength, the knowledge of which is absolutely essential for the efficient and economical utilization of the computers controlling the rolling process.
Book Synopsis Investigation of the Formability (including Hydroforming Capability), Springback and Crash Resistance of Modern High Strength Steels Under Development by :
Download or read book Investigation of the Formability (including Hydroforming Capability), Springback and Crash Resistance of Modern High Strength Steels Under Development written by and published by . This book was released on 2005 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics of Strain Hardening of Structural Steels by : Yu.F. Ivanov
Download or read book Physics of Strain Hardening of Structural Steels written by Yu.F. Ivanov and published by Materials Research Forum LLC. This book was released on 2023-11-05 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews new research in the area of deformation mechanisms of structural steels and the possibilities to control the process of strain hardening. Topics covered include: The bainite, martensite and pearlite structure of these steels; the strengthening mechanisms of quenched steel; the evolution of phase composition and defect sub-structure of bainitic steel under deformation; the hardening mechanisms of bainitic steels; and the strain hardening of structural steels with pearlite structure. Keywords: Structural Steels, Strain Hardening, Uniaxial Compression, Martensite Structure, Pearlite Structure, Bainite Structure, Plasticity, Fracture Toughness, Tribological Properties, Wear Resistance, Strength Properties, Corrosion Resistant Steel, Impact Strength, Dislocation Density, Weldability.
Book Synopsis Advanced High Strength Steel And Press Hardening - Proceedings Of The 2nd International Conference (Ichsu2015) by : Yisheng Zhang
Download or read book Advanced High Strength Steel And Press Hardening - Proceedings Of The 2nd International Conference (Ichsu2015) written by Yisheng Zhang and published by World Scientific. This book was released on 2016-03-11 with total page 753 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings brings together one hundred and ten selected papers presented at the 2nd International Conference on Advanced High Strength Steel and Press Hardening (ICHSU2015), which was held in Changsha, China, during October 15-18, 2015.To satisfy the increasingly urgent requirement of reducing the weight of vehicle structures and increasing passenger safety, ICHSU2015 provided an excellent international platform for researchers to share their knowledge and results in theory, methodology and applications of advanced high strength steel and press hardening technology.This conference aroused great interests and attentions from domestic and foreign researchers in hot stamping field. Experts in this field from Australia, China, Germany and Sweden, contributed to the collection of research results and developments. The papers cover almost all the current topics of advanced high strength steel and press hardening technology.
Book Synopsis Advanced High Strength Steel and Press Hardening by : Yisheng Zhang
Download or read book Advanced High Strength Steel and Press Hardening written by Yisheng Zhang and published by World Scientific Publishing Company. This book was released on 2018 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: The automotive industry requirements for vehicle weight reduction, weight containment, improved part functionality and passenger safety have resulted in the increased use of steel grades with a fully martensitic microstructure. These steel grades are essential to improve the anti-intrusion resistance of automotive body parts and the related passenger safety during car collisions. Standard advanced high strength steel (AHSS) grades are notoriously difficult to be formed by cold stamping; they are characterized by elastic springback, poor stretch flangeability and low hole expansion ratios. Hot stamping has therefore received much attention recently as an alternative technology to produce AHSS automotive parts. In this book, selected articles from the Fourth International Conference on Advanced High Strength Steel and Press Hardening held on August 20-22th, 2018 in Hefei, China, are compiled. It focuses on AHSS for the development of press hardening of high performance sheet metal for lightweight vehicle, advanced digital manufacturing technology, as well as the physical metallurgy principles of the hot stamping process. Aiming at the process design and industrial application for hot stamping of press hardened steel and high strength aluminium alloy sheet, the effect of temperature and strain rate on the formability and mechanical properties of the products is discussed. In addition, more practical cases are provided concerning accurate modelling and multi-physics coupling simulation of the hot stamping process. Furthermore, the influence of tool design on forming process, more precise process control strategies to increase production efficiency, and the improvement of hot stamping equipment by advanced design methods will also be presented.
Book Synopsis Advanced High Strength Steel And Press Hardening - Proceedings Of The 4th International Conference On Advanced High Strength Steel And Press Hardening (Ichsu2018) by : Ma Mingtu
Download or read book Advanced High Strength Steel And Press Hardening - Proceedings Of The 4th International Conference On Advanced High Strength Steel And Press Hardening (Ichsu2018) written by Ma Mingtu and published by World Scientific. This book was released on 2018-12-14 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: The automotive industry requirements for vehicle weight reduction, weight containment, improved part functionality and passenger safety have resulted in the increased use of steel grades with a fully martensitic microstructure. These steel grades are essential to improve the anti-intrusion resistance of automotive body parts and the related passenger safety during car collisions. Standard advanced high strength steel (AHSS) grades are notoriously difficult to be formed by cold stamping; they are characterized by elastic springback, poor stretch flangeability and low hole expansion ratios. Hot stamping has therefore received much attention recently as an alternative technology to produce AHSS automotive parts.In this book, selected articles from the Fourth International Conference on Advanced High Strength Steel and Press Hardening held on August 20-22th, 2018 in Hefei, China, are compiled. It focuses on AHSS for the development of press hardening of high performance sheet metal for lightweight vehicle, advanced digital manufacturing technology, as well as the physical metallurgy principles of the hot stamping process.Aiming at the process design and industrial application for hot stamping of press hardened steel and high strength aluminium alloy sheet, the effect of temperature and strain rate on the formability and mechanical properties of the products is discussed. In addition, more practical cases are provided concerning accurate modelling and multi-physics coupling simulation of the hot stamping process. Furthermore, the influence of tool design on forming process, more precise process control strategies to increase production efficiency, and the improvement of hot stamping equipment by advanced design methods will also be presented.
Book Synopsis Advanced High Strength Steel And Press Hardening - Proceedings Of The 3rd International Conference On Advanced High Strength Steel And Press Hardening (Ichsu2016) by : Yisheng Zhang
Download or read book Advanced High Strength Steel And Press Hardening - Proceedings Of The 3rd International Conference On Advanced High Strength Steel And Press Hardening (Ichsu2016) written by Yisheng Zhang and published by World Scientific. This book was released on 2017-03-03 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings brings together seventy seven selected papers presented at the 3rd International Conference on Advanced High Strength Steel and Press Hardening (ICHSU2016), which was held in Xi’an, China, during August 25-27, 2016.In this rapid growing market in advanced high strength steel and press hardening, in particularly demand from automotive industry and sustainability community to develop light-weight materials for Body in white or BIW, has motivated us to organize ICHSU2016, soon after the successful conclusion of our ICHSU2015 last year to encourage experts all over the world to get together again to exchange note and ideas as how to move the R&D in press hardening technology forward in the new era.The purpose of holding ICHSU2016 is to satisfy the increasingly urgent requirement of reducing the weight of vehicle structures and increasing passenger safety. This conference arouses great interests and attentions from domestic and foreign researchers in hot stamping field, of the articles accepted, covering almost all the current topics of advanced high strength steel and press hardening technology, which includes materials & testing, modeling & simulation, process design, tribology & tools, equipment and product properties.
Download or read book Sheet Metal 2013 written by R.B. Clarke and published by Trans Tech Publications Ltd. This book was released on 2013-04-24 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collection provides an outlet for both industry and academia alike to present their latest findings in the area of sheet metal forming. Volume is indexed by Thomson Reuters CPCI-S (WoS). There are 69 peer reviewed contributions from Industry and academia representing 23 Countries. The research presented covers a diverse field from the fundamental testing and characterisation of sheet metals to the development of new and innovative forming processes.
Book Synopsis Physics of Strain Hardening of Structural Steels by : Yu.F. Ivanov
Download or read book Physics of Strain Hardening of Structural Steels written by Yu.F. Ivanov and published by Materials Research Forum LLC. This book was released on 2023-11-05 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews new research in the area of deformation mechanisms of structural steels and the possibilities to control the process of strain hardening. Topics covered include: The bainite, martensite and pearlite structure of these steels; the strengthening mechanisms of quenched steel; the evolution of phase composition and defect sub-structure of bainitic steel under deformation; the hardening mechanisms of bainitic steels; and the strain hardening of structural steels with pearlite structure. Keywords: Structural Steels, Strain Hardening, Uniaxial Compression, Martensite Structure, Pearlite Structure, Bainite Structure, Plasticity, Fracture Toughness, Tribological Properties, Wear Resistance, Strength Properties, Corrosion Resistant Steel, Impact Strength, Dislocation Density, Weldability.
Book Synopsis High Strain Rate Characterization of Advanced High Strength Steels by : Alan Thompson
Download or read book High Strain Rate Characterization of Advanced High Strength Steels written by Alan Thompson and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanics of Sheet Metal Forming by : Z. Marciniak
Download or read book Mechanics of Sheet Metal Forming written by Z. Marciniak and published by Butterworth-Heinemann. This book was released on 2002-06-04 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Material properties -- Sheet deformation processes -- Deformation of sheet in plane stress -- Simplified stamping analysis -- Load instability and tearing -- Bending of sheet -- Simplified analysis of circular shells -- Cylindrical deep drawing -- Stretching circular shells -- Combined bending and tension of sheet -- Hydroforming.
Book Synopsis Physics and Phenomenology of Strain Hardening by : U. F. Kocks
Download or read book Physics and Phenomenology of Strain Hardening written by U. F. Kocks and published by . This book was released on 2003 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Identification of Strainrate Dependent Hardening Sensitivity of Metallic Sheets Under In-plane Biaxial Loading by : Wei Liu
Download or read book Identification of Strainrate Dependent Hardening Sensitivity of Metallic Sheets Under In-plane Biaxial Loading written by Wei Liu and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sheet metal forming processes are widely adopted to produce panels, tubes, profiled parts in manufacturing industry. The numerical simulation of the forming processes requires accurate constitutive models of material. In many sheet metal working operations such as stamping, hydroforming, ..., large strains and intermediate strain rates can be reached under biaxial strain or stress states. The objective of this work is to show the potential of the biaxial in-plane tensile test to characterize the hardening behaviour of metal sheets up to large strain levels. By numerical investigation, an optimal cruciform shape is designed to obtain large equivalent plastic strain, up to 30%, at the central zone under equi-biaxial strain path. As expected, the initial cracks of tested specimens are always observed at the central zone. Then, quasi-static and dynamic biaxial tensile tests on in-plane cross specimens have been performed on a dedicated servo-hydraulic machine. These biaxial tensile tests have been carried out on aluminium alloy AA5086 to validate the identification methodology of hardening behaviour under biaxial loading. This alloy has been chosen since its hardening behaviour is not dependent on the strain rate. Digital Image Correlation (DIC) technique is used for strain measurement. The parameters of isotropic hardening models are identified by inverse analysis based on the finite element model of the biaxial tensile test. Three yield criteria of Mises, Hill48 and Bron and Besson are compared for the parameter identification of different hardening laws. It is shown that the hardening law identified by biaxial test is precise only if an appropriate yield function is preliminarily determined. The biaxial flow stress curve identified with Bron and Besson yield function have been found in good agreement with the experimental flow stress curve obtained from uniaxial tensile tests. For biaxial tests at intermediate strain rates, damping layers are adopted to reduce oscillations on force versus time curves. The comparison of flow stress curves, identified from quasi-static and dynamic biaxial in-plane tensile tests on the non strain rate-dependent material AA5086, validates the identification methodology of strain-rate dependent hardening models. Finally, the proposed methodology is applied to the hardening characterization of a strain-rate dependent Dual Phase steel DP600 at room temperature. Identified biaxial flow stress curves have been compared with uniaxial ones for different strain rates ( . = 10-3s-1, 10-1s-1 and 101s-1). DP600 steel exhibits the same positive strain rate sensitivity for uniaxial and biaxial strain states. The biaxial flow stress curves identified on the basis of Ludwick and Voce hardening models are close, up to equivalent plastic strains of 30%. The benefits of the proposed methodology, based on a biaxial in-plane tensile test carried out on cross specimen, are clearly shown since the hardening behaviour identified in this case for large strains (up to 30%) is very different from the one identified from uniaxial tensile test on a smaller strain range.
Book Synopsis Bauschinger Effects and Work-hardening in Spheroidized Steels by :
Download or read book Bauschinger Effects and Work-hardening in Spheroidized Steels written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of cementite particles and subgrain boundaries on work-hardening behavior of spheroidized carbon steels were investigated by making direct measurements of residual internal stresses. These internal stresses developed due to plastic incompatibilities between elastic particles and an elastic-plastic matrix. A continuum analysis of these internal stress fields, based upon a multiple slip model, is presented and is found to be in good accord with the experiments. The internal stresses appear to saturate in the plastic strain range of 3 approx. 5% where a transition in strain-hardening behavior was observed (''double-n'' behavior), and to contribute approximately 20% to total work-hardening. The cementite-particle-pinned-subgrain-boundaries, formed during a post-quench annealing treatment, were found to lower the internal stress, thus indicating that they assisted the relaxation processes of entrapped Orowan loops by acting as sources of dislocations. The flow stress increment in dispersion hardened alloys due to work-hardening consisted of internal stress, forest stress, and source-shortening stress. The flow stress curves of spheroidized carbon steels were found to be described by a modified mean-square-root addition law of the form: sigma/sub f/ = sigma/sub epsilon/sub p/=0/ = sigma/sup i/ ((.delta.sigma/sup s/)/sup 2/ + (.delta.sigma/sup ss/)/sup 2/ + (sigma/sup f/)/sup 2/)/sup 1///sup 2/. The maximum normal interfacial stresses were estimated from the data. The maximum values occurred in the tensile direction at the poles of particles and the magnitude was found to be approximately one half of flow stress. The significance of these stresses regarding interface cavitation is discussed briefly.
Book Synopsis On the Strain Hardening Mechanisms of a High-Mn Lightweight Steel by : Emanuel David Welsch
Download or read book On the Strain Hardening Mechanisms of a High-Mn Lightweight Steel written by Emanuel David Welsch and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strain Hardening at Large Strains by :
Download or read book Strain Hardening at Large Strains written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The strain hardening properties of various fcc metals have been investigated at large strains by means of torsion tests of short thin-walled cylinders. The results show that Stage IV occurs in all cases provided that a low enough test temperature is used; it is a nearly constant hardening rate of 2.10/sup /minus/4/ G in terms of resolved flow stress. Stage IV strain hardening has been modeled by considering the effects of accumulation of dislocation debris, such as dipoles and loops, in the ''saturation'' stress. The ''saturation'' stress that can be obtained by extrapolation of Stage III is now a limiting flow stress that slowly increases with the accumulation of debris. The model reproduces the sharp transition from Stage III to Stage IV that occurs experimentally at low temperatures and, for a reasonable choice of parameters, the rate of hardening in Stage IV. 15 refs., 8 figs.
