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Introduction to the Physical Metallurgy of Welding deals primarily with the welding of steels, which reflects the larger volume of literature on this material; however, many of the principles discussed can also be applied to other alloys. The book is divided into four chapters, in which the middle two deal with the microstructure and properties of the welded joint, such as the weld metal and the heat-affected zone. The first chapter is designed to provide a wider introduction to the many process variables of fusion welding, particularly those that may influence microstructure and properties, while the final chapter is concerned with cracking and fracture in welds. A comprehensive case study of the Alexander Kielland North Sea accommodation platform disaster is also discussed at the end. The text is written for undergraduate or postgraduate courses in departments of metallurgy, materials science, or engineering materials. The book will also serve as a useful revision text for engineers concerned with welding problems in industry.
The effects of weld porosity on the dynamic tear properties of A514F steel butt welds were assessed in a program which conducted dynamic tear tests in six areas of experimentation: (1) the base plate steel in the longitudinal and transverse orientations; (2) sound weld metal; (3) weld metal containing clustered porosity; (4) weld metal containing linear porosity; (5) stress-relieved weld metal; and (6) base metal in the longitudinal and transverse directions having fatigue precracked notches. The upper shelf dynamic tear toughness of the base plate was observed to be much greater for specimens with the notchh oriented perpendicular to the final rolling direction than for the specimens with the notch parallel to the final Specimens which had notches precracked in fatigue and oriented parallel to the rolling direction had the same toughness-temperature behavior as specimens that were machine-notched in the same orientation. The toughness values of the fatigue precracked specimens whose notches were perpendicular to the rolling direction were greater than for the same orientation specimens with machined notches. The fatigue precracked specimens had higher temperature ductile-to-brittle transitions than the machine-notched specimens. Weld specimens had upper shelf toughness values which were less than the toughness values of base plate specimens that were notched perpendicular to their rolling direction; however, these values were greater than the toughness values of base plate specimens notched parallel to the rolling direction. Both the clustered porosity and the linear porosity specimens had toughness values somewhat lower than the sound weld specimens.
The Trends conference attracts the world's leading welding researchers. Topics covered in this volume include friction stir welding, sensing, control and automation, microstructure and properties, welding processes, procedures and consumables, weldability, modeling, phase transformations, residual stress and distortion, physical processes in welding, and properties and structural integrity of weldments.
This text explains vessel manufacture and procedures for quality assurance and control, methods for code specification compliance, all stages of the manufacturing process, and promotes uniformity of inspection, testing, and documentation. Analyzing radiographic testing procedures, the book acts as an explanation to the ASME code, features the A to Z of fabrication methodology, discusses NDT, heat treatment, and pad air and hydrostatic tests, methodology to compile a Manufacturer's Data Report, typical quality, inspection, and test plans, the requirements of welding procedure specification, procedure qualification records, and welder qualification tests, and recommended tolerances for vessels.