Topic
Heat-affected zone
About: Heat-affected zone is a research topic. Over the lifetime, 18787 publications have been published within this topic receiving 231744 citations.
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15 Aug 2006-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the microstructure, the microchemistry and the environmental assisted cracking susceptibility for friction stir welded 2219-T87 plates were investigated for the constant extension rate tensile tests were carried out in air and in a 3.5% NaCl solution.
Abstract: The microstructure, the microchemistry and the environmental assisted cracking susceptibility was investigated for friction stir welded 2219-T87 plates. It was found that the coarsening of the Al2Cu intragranular precipitates occurring within the thermo-mechanically and the heat affected zones after friction stir welding correlates with a decrease in the hardness values. The regions with the lowest hardness are relatively narrow in size and are limited to the boundary between the thermo-mechanically affected zone and the nugget. The weld microzones exhibited a different microstructure but a similar environmental assisted cracking susceptibility. The environmental cracking susceptibility of the weld was generally low. The constant extension rate tensile tests were carried out in air and in a 3.5 wt.% NaCl solution. For samples tested transverse to the welding direction failure occurred within the thermo-mechanically affected zone–nugget boundary. The thermo-mechanically affected zone–nugget boundary was also the softer region of the weld. The corrosion immersion tests indicated an increased resistance to corrosion for the friction stir welded region as compared to the weld unaffected parent metal.
69 citations
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TL;DR: In this paper, the microstructures of the ultrasonic welds between three layers of lithium-ion battery tabs (either Al or Cu) and bus bars were studied, and the weld formation mechanism and failure modes were investigated.
69 citations
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TL;DR: In this paper, the interfacial reaction between aluminum 6111-T4 and DC04 uncoated steel has been investigated as a function of welding time, showing that deformation induced vacancies during the thermomechanical welding process accelerates formation of intermetallic layer at the interface.
69 citations
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TL;DR: Pulsed laser welding of TC4 Titanium alloy to SUS301L stainless steel with Nb sheet as interlayer was applied and a hybrid joint was obtained comprising two metallurgical bonding zones based on two different kinds of joining mechanisms as mentioned in this paper.
69 citations
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TL;DR: In this paper, the microstructure evolution of the reheated columnar region and coarse grain heat affected zone (CGHAZ) is discussed to explain the beneficial effect of temper bead.
69 citations