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Author : A. R. Elsea,Ellis E. Fletcher
Publisher : Unknown
Page : 166 pages
File Size : 43,7 Mb
Release : 1964
Category : Steel
ISBN : UOM:39015095154608
Author : A. R. Elsea,E. E. Fletcher
Publisher : Unknown
Page : 42 pages
File Size : 42,9 Mb
Release : 1963
Category : Steel
ISBN : UOM:39015095155274
This memorandum introduces the problem of delayed, brittle failures associated with hydrogen in steel, particularly high-strength steel. It is intended to help the steel user determine if he has such a problem. The effects of hydrogen on the mechanical properties of steel are dealt with, and the behavior of material susceptible to delayed, brittle failure is described. Also, the effects of such factors as strength level, magnitude of applied stress, hydrogen content, steel composition, test temperature, and strain rate on hydrogen embrittlement and the susceptibility to hydrogen-induced, delayed, brittle failure are discussed. Possible sources of hydrogen in steel and the types of tests useful in determining the susceptibility to delayed failure are outlined. (Author).
Author : Ellis E. Fletcher,Warren E. Berry,A. R. Elsea
Publisher : Unknown
Page : 28 pages
File Size : 43,5 Mb
Release : 1966
Category : Metals
ISBN : UOM:39015095158211
High-strength steels are susceptible to delayed cracking under suitable conditions. Frequently such a brittle failure occurs at a stress that is only a fraction of the nominal yield strength. Considerable controversy exists over whether such failures result from two separate and distinct phenomena or whether there is but one mechanism called by two different names. Stress-corrosion cracking is the process in which a crack propagates, at least partially, by the stress induced corrosion of a susceptible metal at the advancing tip of the stress-corrosion crack. There is considerable evidence that this cracking results from the electrtrochemical corrosion of a metal subjected to tensile stresses, either residual or externally applied. Hydrogen-stress cracking is cracking which occurs as the result of hydrogen in the metal lattice in combination with tensile stresses. Hydrogen-stress cracking cannot occur if hydrogen is prevented from entering the steel, or if hydrogen that has entered during processing or service is removed before permanent damage has occurred. It is generally agreed that corrosion plays no part in the actual fracture mechanism. This report was prepared to point out wherein the two fracture mechanisms under consideration are similar and wherein they differ. From the evidence available today, the present authors have concluded that there are two distinct mechansims of delayed failure. (Author).
Author : Alexander Robert Troiano,Ronald Gibala,R. F. Hehemann
Publisher : ASM International
Page : 356 pages
File Size : 54,5 Mb
Release : 1984-01-01
Category : Technology & Engineering
ISBN : 1615031782
Author : Mahmoud Y. Demeri
Publisher : ASM International
Page : 312 pages
File Size : 45,5 Mb
Release : 2013-08-01
Category : Business & Economics
ISBN : 9781627080057
Examines the types, microstructures and attributes of AHSSAlso reviews the current and future applications, the benefits, trends and environmental and sustainability issues.
Author : P. A. Kammer,K. Masubuchi,R. E. Monroe
Publisher : Unknown
Page : 132 pages
File Size : 40,9 Mb
Release : 1964
Category : Steel
ISBN : UOM:39015095154590
Weldment cracking is a broad complex field. Even if one considers only cracking of steel weldments, the problems range from cracking at temperatures near the solidus during welding to cracking at room temperature days, weeks, or months after welding is completed. Numerous reports of investigations in this field are contained in the published and unpublished literature. However, most of these reports cover only a particular problem in a specific area of the broad field of weldment cracking. This review attempts to cover the major aspects of the entire field of weldment cracking. Necessarily, the review is for the most part general, only being specific in a few instances to illustrate a point. (Author).
Author : Ma Mingtu,Zhang Yisheng
Publisher : World Scientific
Page : 632 pages
File Size : 52,5 Mb
Release : 2018-12-14
Category : Technology & Engineering
ISBN : 9789813277991
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.
Author : Victor Raymond Sawicki
Publisher : Unknown
Page : 246 pages
File Size : 53,8 Mb
Release : 1971
Category : Steel
ISBN : CORNELL:31924004706267
Author : Anonim
Publisher : Unknown
Page : 1346 pages
File Size : 47,8 Mb
Release : 1985
Category : Aeronautics
ISBN : UIUC:30112075701224
Author : Charles W. Marschall
Publisher : Unknown
Page : 46 pages
File Size : 52,5 Mb
Release : 1961
Category : Steel, High strength
ISBN : UOM:39015095151042
Author : Battelle Memorial Institute. Defense Metals Information Center
Publisher : Unknown
Page : 38 pages
File Size : 46,7 Mb
Release : 1968
Category : Alloys
ISBN : UOM:39015095158161
Author : J. E. Campbell
Publisher : Unknown
Page : 32 pages
File Size : 54,8 Mb
Release : 1964
Category : Alloys
ISBN : UOM:39015095155399
Fracture-toughness testing using principles of fracture mechanics has developed to the point where it can be used as a basis for selection of materials, for estimating limiting design stresses assuming the presence of small flaws, and for analyzing failures. Current methods of measuring plane-stress and plane-strain fracturetoughness parameters are presented in this report. The specimens include center-cracked, edge-cracked, single-edge-cracked, surface-cracked, and notched round bars, which are subjected to tensile loading, and notched bars for bend tests. The different types of specimens permit evaluating sheet, plate, bar stock, and forgings as well as material from failed structures. Application of fracture-toughness parameters to design of high-strength structures is reviewed for both static and fatigue loading. Consideration of the fracture-mechanics concepts in design should lead to fewer problems with brittle fracture in high-strength structures. (Author).
Author : Raymond L.
Publisher : ASTM International
Page : 274 pages
File Size : 50,7 Mb
Release : 1974
Category : Electronic
ISBN : 8210379456XXX
Author : Anonim
Publisher : Unknown
Page : 616 pages
File Size : 50,6 Mb
Release : 2024-07-02
Category : Nuclear engineering
ISBN : UCAL:B3155106
Author : Anonim
Publisher : Unknown
Page : 1004 pages
File Size : 52,9 Mb
Release : 1967
Category : Nuclear engineering
ISBN : STANFORD:36105012479346