Weld cracks are unacceptable defects that can compromise the integrity of welded structures. Weld cracking can lead to structural failures which at best will require remedial action and at worst can lead to loss of life. Weld cracking in ferrous alloys reviews the latest developments in the design, evaluation, prevention and repair of weld cracks. Part one reviews the fundamentals as well as recent advances in the areas of welding technology, design and material selection for preventing weld cracking. Part two analyses weld crack behaviour, evaluation and repair of cracking/cracked welds. The book benefits from an extensive and robust chapter on the topic of NDE and quality control that was contributed by one of the most respected non-destructive evaluation and development groups in the world. Part three covers environment assisted weld cracking. With its distinguished editor and international team of contributors, Weld cracking in ferrous alloys is a valuable source of reference for all those concerned with improving the quality of welding and welded components. In the planning and development of this book, particular care has been taken to make the chapters suitable for people from other disciplines who need to understand weld cracking and failure. Reviews the latest developments in the design, evaluation, prevention and repair of weld cracks Assesses recent advances in welding technology, design and material selection Analyses weld crack behaviour, evaluation and repair including environment assisted weld cracking
Failure of welded components can occur during service as well as during fabrication. Most common, analyses of the resistance of welded components against failure are targeted at crack avoidance. Such evaluations are increasingly carried out by modern weldability studies, i. e. considering interactions between the selected base and filler materials, structural design and welding process. Such weldability investigations are particularly targeted to prevent hot cracking, as one of the most common cracking phenomena occurring during weld fabrication. To provide an international information and discussion platform to combat hot cracking, an international workshop on Hot Cracking Phenomena in Welds has been created, based on an initiative of the Institute for Materials and Joining Technology at the Otto-von-Guericke University in Magdeburg and the Division V. 5 – Safety of Joined Components at the Federal Institute for Materials Research and Testing (BAM) in Berlin, Germany. The first workshop was organized in Berlin under the topics mechanisms and phenomena, metallurgy and materials, modelling and simulations as well as testing and standardization. It consisted of 20 individual contributions from eight countries, which were compiled in a book that found a very ready market, not only in the welding community. As a consequence of increasing interest, it has been decided to establish the Workshop on Hot Cracking Phenomena in Welds as a regular event every three years embedded in the International Institute of Welding (IIW). Attached to the IIW Commission IX and II Spring intermediate meetings, the second workshop was organized in March 2007.
Hot cracking in welds still has not been fully understood. Hot Cracking Phenomena in Welds contains 20 individual contributions from experts all over the world. The book provides the latest insight on hot cracking phenomena in welds and gives a comprehensive overview of the state of knowledge in this subject, addressing engineers and scientists in research and development. It contains numerous solutions and helpful guidance on specific problems, particularly for welding engineers confronted with hot cracking in practice. The book touches all three types of hot cracking, namely solidification cracking, liquation cracking and ductility dip cracking. It explains the differences of the mechanisms, thus representing also a very helpful tool for metallurgists and advanced engineering students. TOC:Phenomena and Mechanisms.- Metallurgy and Materials.- Modelling and Simulation.- Testing and Standardisation.
The book first addresses the advancements in the determination of steel weld microstructure and then systematically reviews progress in the various ferrous alloy systems starting out with low carbon steels, going through stainless steels and finishing with duplex stainless steels.
The purpose of this report is to summarize the present state of aluminum-welding technology. The major topics covered are: Basic metallurgy of various heat-treatable and non-heat-treatable alloy classes; welding processes used for joining aluminum with emphasis on newer processes and procedures which are considered important in defense metals industries; welding characteristics of various alloys; comparison of tensile properties, cracking tendencies, notch toughness, and stress-corrosion characteristics of various weldments; dissimilar metal welds; and causes of porosity and cracking of aluminum welds and the effect of porosity on weld strength. (Author).
"Current welding literature" included in each volume.
This book is intended, like its predecessor (The metallurgy of welding, brazing and soldering), to provide a textbook for undergraduate and postgraduate students concerned with welding, and for candidates taking the Welding Institute examinations. At the same time, it may prove useful to practising engineers, metallurgists and welding engineers in that it offers a resume of information on welding metallurgy together with some material on the engineering problems associated with welding such as reliability and risk analysis. In certain areas there have been developments that necessitated complete re-writing of the previous text. Thanks to the author's colleagues in Study Group 212 of the International Institute of Welding, understanding of mass flow in fusion welding has been radically transformed. Knowledge of the metallurgy of carbon and ferritic alloy steel, as applied to welding, has continued to advance at a rapid pace, while the literature on fracture mechanics accumulates at an even greater rate. In other areas, the welding of non-ferrous metals for example, there is little change to report over the last decade, and the original text of the book is only slightly modified. In those fields where there has been significant advance, the subject has become more quantitative and the standard of math ematics required for a proper understanding has been raised.
|Author||: T. F. Pearson|
|Release Date||: 1968|
|Pages||: 240 pages|
Discover the extraordinary progress that welding metallurgy has experienced over the last two decades Welding Metallurgy, 3rd Edition is the only complete compendium of recent, and not-so-recent, developments in the science and practice of welding metallurgy. Written by Dr. Sindo Kou, this edition covers solid-state welding as well as fusion welding, which now also includes resistance spot welding. It restructures and expands sections on Fusion Zones and Heat-Affected Zones. The former now includes entirely new chapters on microsegregation, macrosegregation, ductility-dip cracking, and alloys resistant to creep, wear and corrosion, as well as a new section on ternary-alloy solidification. The latter now includes metallurgy of solid-state welding. Partially Melted Zones are expanded to include liquation and cracking in friction stir welding and resistance spot welding. New chapters on topics of high current interest are added, including additive manufacturing, dissimilar-metal joining, magnesium alloys, and high-entropy alloys and metal-matrix nanocomposites. Dr. Kou provides the reader with hundreds of citations to papers and articles that will further enhance the reader’s knowledge of this voluminous topic. Undergraduate students, graduate students, researchers and mechanical engineers will all benefit spectacularly from this comprehensive resource. The new edition includes new theories/methods of Kou and coworkers regarding: · Predicting the effect of filler metals on liquation cracking · An index and analytical equations for predicting susceptibility to solidification cracking · A test for susceptibility to solidification cracking and filler-metal effect · Liquid-metal quenching during welding · Mechanisms of resistance of stainless steels to solidification cracking and ductility-dip cracking · Mechanisms of macrosegregation · Mechanisms of spatter of aluminum and magnesium filler metals, · Liquation and cracking in dissimilar-metal friction stir welding, · Flow-induced deformation and oscillation of weld-pool surface and ripple formation · Multicomponent/multiphase diffusion bonding Dr. Kou’s Welding Metallurgy has been used the world over as an indispensable resource for students, researchers, and engineers alike. This new Third Edition is no exception.
|Author||: Matthew George Gemmill|
|Release Date||: 1966|
|Pages||: 242 pages|