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An Investigation Of Metallurgical Factors Which Affect The Fracture Toughness Of Ultra High Strength Steels
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Book Synopsis An Investigation of Metallurgical Factors which Affect the Fracture Toughness of Ultra High Strength Steels by : William Edwin Wood
Download or read book An Investigation of Metallurgical Factors which Affect the Fracture Toughness of Ultra High Strength Steels written by William Edwin Wood and published by . This book was released on 1973 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AN INVESTIGATION OF METALLURGICAL FACTORS WHICH AFFECT THE FRACTURE TOUGHNESS OF ULTRA HIGH STRENGTH STEELS. by :
Download or read book AN INVESTIGATION OF METALLURGICAL FACTORS WHICH AFFECT THE FRACTURE TOUGHNESS OF ULTRA HIGH STRENGTH STEELS. written by and published by . This book was released on 1973 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relationship between microstructure, heat treatment and room temperature fracture toughness has been determined for the low alloy ultra-high strength steels 4130, 4330, 4340, 4140 and 300-M. Optical metallography, microprobe analysis, and scanning electron microscopy were used to characterize the structure and morphology, while both Charpy V-notch impact tests and plane strain fracture toughness tests were used to determine the fracture properties. The normal commercial heat treatment resulted in the formation of some bainite in all the alloys. MnS inclusions on prior austenite grain boundaries were found to initiate cracks during loading. By increasing the austenitizing temperature to l200 C, the fracture toughness could be increased by at least 60%. For some alloys increasing the severity of the quench in conjunction with the higher austenitizing temperatures resulted in further increases in the fracture toughness, and the elimination of any observable upper bainite. There was no correlation between the Charpy impact test results and the fracture toughness results. The alloys 4130, 4140, 4340 all showed a severe intergranular embrittlement when austenitized at high temperatures and tempered above 200 C, while the alloys 4330 and 300-M exhibited no drop in toughness for the same heat treatment conditions. The as-quenched tensile specimens had a very low 'micro' yield strength which rapidly increased to the level of the 'macro' yield strength when tempered.
Book Synopsis The Factors Influencing the Fracture Characteristics of High-strength Steel by : Charles W. Marschall
Download or read book The Factors Influencing the Fracture Characteristics of High-strength Steel written by Charles W. Marschall and published by . This book was released on 1961 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Fracture Toughness Mechanism in Ultra-fine-grained Steels by : Toshihiro Hanamura
Download or read book Analysis of Fracture Toughness Mechanism in Ultra-fine-grained Steels written by Toshihiro Hanamura and published by Springer. This book was released on 2014-09-04 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, advanced steel technologies mainly developed at the National Institute for Materials Science (NIMS), Japan, for structure control, mechanical properties, and the related mechanisms are introduced and discussed. NIMS has long worked on developing advanced steel techniques, namely, producing advanced steels by using only simple alloying elements such as carbon, manganese, and silicon, and also by utilizing steel scrap. The hope is that this approach will lead to a technology of a so-called steel-to-steel recycling process, with the ultimate goal of a recycling process such as an automotive-steel-to-automotive-steel recycling process to take the place of the current cascade-type recycling system. The main idea is to utilize ultra-grain refining structures and hetero structures as well as martensite structures. In particular, the focus of this book is on tensile strength and toughness of advanced steels from both the fundamental and engineering points of view. Fundamentally, a unique approach to analysis is taken, based on fracture surface energy as effective grain size is employed to better understand the mechanism of property improvement. From the engineering point of view, in fracture toughness such factors as crack tip opening displacement (CTOD) of advanced steels are evaluated in comparison with those of conventional steels.
Book Synopsis Fracture Toughness Characteristics of the New Weldable Steels of 180- to 210-Ksi Yield Strengths by : Peter P. Puzak
Download or read book Fracture Toughness Characteristics of the New Weldable Steels of 180- to 210-Ksi Yield Strengths written by Peter P. Puzak and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The yield strength range for steels from 180 to 210 ksi is currently covered by four weldable alloys of the following nominal chemical analysis: 18%Ni-8%Co-3%Mo maraging steel, 12%Ni-5%Cr-3%Mo maraging steel, 9%Ni-4%Co-0.20%C quenched and tempered (Q and T) steel, and 10%Ni-8%Co-2%Cr-1%Mo-0.10%C Q and T steel. Broad ranges of fracture resistance have been reported for these materials based on various fracture tests, and this report presents information for material selection and design guidance by providing an analysis of the interactions between the metallurgical and mechanical parameters that contribute to the fracture resistance of plate products. Definitions of the interaction between the metallurgical and the mechanical aspects are developed with the use of the Dynamic Tear (DT) test and the Ratio Analysis Diagram (RAD). (Author).
Book Synopsis Fracture Toughness of High-strength Steels for Military Applications by : J. E. Campbell
Download or read book Fracture Toughness of High-strength Steels for Military Applications written by J. E. Campbell and published by . This book was released on 1968 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Memorandum discusses the current situation on the inclusion of fracture-toughness testing requirements in specifications for high-strength steels used for military applications. The Memorandum was prepared at the request of The Technical Cooperation Program (TTCP), and contains information from Canadian and British members of that program, as well as U.S. information. Military applications discussed include missile motor cases, aircraft landing gear, gun tubes, armor plate, and hydrofoils. (Author).
Download or read book NASA Technical Paper written by and published by . This book was released on 1978 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Metallurgical Factors on the Fast Fracture Energy Absorption Rates of Some High Strength Steels by : G. T. Hahn
Download or read book Influence of Metallurgical Factors on the Fast Fracture Energy Absorption Rates of Some High Strength Steels written by G. T. Hahn and published by . This book was released on 1974 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of rapid fracture in the double cantilever beam specimen has been developed and perfected as a fully dynamic treatment based on an energy balance. It provides the means of extracting the dynamic fracture energy expended during rapid crack propagation in this specimen. Substantial progress was also made in perfecting the test procedure through measurements of the stress intensity at crack arrest and the speed of propagation. This has enabled verification of the important predictions of the model. The resulting methodology has been applied to a comparison of the dynamic toughness of AISI4340 and O-1 tool steel and a study of the influence of microstructural features on the resistance to rapid crack propagation. (Author).
Book Synopsis Metallurgical Variables Affecting Fracture Toughness in High-strength Sheet Alloys by : Carl E. Hartbower
Download or read book Metallurgical Variables Affecting Fracture Toughness in High-strength Sheet Alloys written by Carl E. Hartbower and published by . This book was released on 1963 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using precracked Charpy tests supplemented by center-notched tensile tests, the fracture toughness of five low-alloy and three stainless steel high-strength alloys in sheet form was measured primarily as a function of heat treatment variables such as austenitizing and tempering temperatures. The low alloy steels studied were D6AC (two heats)4340 (martensitic and bainitic conditions), X200 (0.35 and 0.40% carbon), 300M and H11; and the stainless steels were AM 355, PH 15-7Mo and 301. For 4340, in the bainitic condition, the influence of subsequent deformation and aging on fracture toughness was also determined. In addition, preliminary studies of the effect of welding both before and after heat treatment on the toughness of H11, 300M and 4340 were carried out. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Report of NRL Progress by : Naval Research Laboratory (U.S.)
Download or read book Report of NRL Progress written by Naval Research Laboratory (U.S.) and published by . This book was released on 1969 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerospace Structural Metals Handbook by :
Download or read book Aerospace Structural Metals Handbook written by and published by . This book was released on 1989 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of the Role of Second Phase Particles in the Design of Ultra High Strength Steels of Improved Toughness by :
Download or read book An Investigation of the Role of Second Phase Particles in the Design of Ultra High Strength Steels of Improved Toughness written by and published by . This book was released on 1993 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of inclusion distributions and fine scale microstructure on the fracture toughness and fracture processes of ultra high strength steels have been investigated. The inclusion distributions vary in the sulfide type and the sulfide types considered were MnS, CrS, La2O2S and Ti2CS. The MnS and CrS particles are smaller and more closely spaced than particles of La2O2S. Resistance to void nucleation is the same if the sulfur is gettered as CrS, MnS or La2O2S. The particles of Ti2CS are smaller and much more resistant to void nucleation than the other sulfide types. The fine scale microstructures were those obtained for the as-quenched, tempered at 425 deg C and tempered at 510 deg C conditions for HY180 and AF1410 steels. The topics then addressed are (a) effect of fine scale microstructure and inclusion distributions on blunting behavior, (b) the role of inclusion spacing at constant inclusion volume fraction on fracture toughness of three fine scale microstructures for HY 180 steel, (c) effect of gettering sulfur as Ti2CS on the fracture toughness of three fine scale microstructures of HY180 steel, (d) morphology of Ti2CS particles, (e) effect of gettering sulfur as Ti2CS on the fracture toughness of AF1410 steel tempered at 510 deg C, and (f) conclusions regarding improving toughness by gettering sulfur as Ti2CS.
Book Synopsis Improving the Toughness of Ultrahigh Strength Steel by : Kōji Satō
Download or read book Improving the Toughness of Ultrahigh Strength Steel written by Kōji Satō and published by . This book was released on 2002 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Relationship of Microstructure to Strength and Toughness in High-strength Steel by : Y. H. Liu
Download or read book The Relationship of Microstructure to Strength and Toughness in High-strength Steel written by Y. H. Liu and published by . This book was released on 1963 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research deals with the relationship between the microstructural features and the susceptibility to brittle fracture of six selected commercially produced ultra-high strength steels. The parameters selected for the susceptibility to brittle fracture were the susceptibility to plastic instability, indicative of the susceptibility to ductile fracture initiation, and controlled total available energy bend test to determine the conditions for acceleration of crack propagation and the energy absorbed in rapid crack propagation. The microstructures were studied by standard techniques of optical microscopy, electron microscopy, and electron diffraction.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
