Welding Metallurgy and Weldability

Describes the weldability aspects of structural materials used in a wide variety of engineering structures, including steels, stainless steels, Ni-base alloys, and Al-base alloys

Welding Metallurgy and Weldability describes weld failure mechanisms associated with either fabrication or service, and failure mechanisms related to microstructure of the weldment. Weldability issues are divided into fabrication and service related failures; early chapters address hot cracking, warm (solid-state) cracking, and cold cracking that occur during initial fabrication, or repair. Guidance on failure analysis is also provided, along with examples of SEM fractography that will aid in determining failure mechanisms. Welding Metallurgy and Weldability examines a number of weldability testing techniques that can be used to quantify susceptibility to various forms of weld cracking.

• Describes the mechanisms of weldability along with methods to improve weldability
• Includes an introduction to weldability testing and techniques, including strain-to-fracture and Varestraint tests
• Chapters are illustrated with practical examples based on 30 plus years of experience in the field

Illustrating the weldability aspects of structural materials used in a wide variety of engineering structures, Welding Metallurgy and Weldability provides engineers and students with the information needed to understand the basic concepts of welding metallurgy and to interpret the failures in welded components.

Nyckelord: Weldability; fabrication-related defects; service-related defects; defect prevention; defect control; welding metallurgy principles; fusion weld; fusion zone; metal solidification; solidification parameters; solidification nucleation; solidification modes; interface stability; weld solidification; macroscopic welding; travel speed; temperature gradient; solidification subgrain boundaries; solidification grain boundaries; migrated grain boundaries; solute redistribution; macroscopic solidification; microscopic solidification; fusion zone microstructures; transition zone; unmixed zone; partially melted zone; penetration mechanism; segregation mechanism; Gibbsian mechanism; grain boundary sweeping; weldability testing; cast pin tear test; chemical analysis; mechanical testing; simulative testing; macroscopic analysis; hydrogen induced cracking; strain age cracking; reheat cracking; liquidation cracking; solid state cracking; Ductility Dip Cracking; weld failures; fracture and fatigue; fatigue failures; corrosion; knifeline attack; stress corrosion cracking; galvanic corrosion; crevice corrosion; selective leaching; erosion corrosion; pitting; hydrogen induced cracking; planar pressure theory; surface adsorption theory; decohesion theory; HELP theory; low alloy steels; stainless steels, Materials Processing, Mechanical Engineering - Design, Materials Processing, Mechanical Engineering - Design