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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TL;DR: In this paper, the formation of acicular ferrite is found to be dependent on the presence of a suitable distribution of oxide inclusions > 0·4 μm in size.
Abstract: Experimental steels similar in composition to structural grades were prepared from weld metal deposits to study the formation of acicular ferrite under conditions experienced in the heat affected zone for a range of welding processes. The formation of acicular ferrite under these conditions is found to be dependent on the presence of a suitable distribution of oxide inclusions > 0·4 μm in size. The characteristics and proportion of acicular ferrite in the microstructure also depend on the prior austenite grain size and cooling rate. The relationship between these factors is presented in a simplified quantitative model, which is supported by data from limited welding trials. Metallographic observations suggest that acicular ferrite forms in two stages. The first involves the formation of relatively large primary acicular ferrite plates by multiple nucleation at intragranular inclusion sites, and the second involves the formation of many smaller acicular ferrite grains that grow sympathetically from...
172 citations
TL;DR: In this paper, a physics-based model for keyhole welding including heat transfer, fluid flow and interfacial interactions has been used to simulate keyhole and porosity formation during laser welding of Ti-6Al-4V titanium alloy.
171 citations
Book•
01 Jan 2004
TL;DR: In this paper, the process of welding is classified into three main steps: welding pool convection, oscillation, and evaporation, and welding fusion zone solidification.
Abstract: THE PROCESS AND PROCESSES OF WELDING. Introduction to the Process of Welding. Classifying Welding Processes. Fusion Welding Processes. Nonfusion Welding Processes. THE PHYSICS OF WELDING. Energy for Welding. The Flow of Heat in Welds. Thermally Induced Distortion and Residual Stresses During Welding. The Physics of Welding Energy or Power Sources. Molten Metal Transfer in Consumable Electrode Arc Welding. Weld Pool Convection, Oscillation, and Evaporation. THE CHEMISTRY OF WELDING. Molten Metal and Weld Pool Reactions. Weld Chemical Heterogeneity. THE METALLURGY OF WELDING. Weld Fusion Zone Solidification. Eutectic, Peritectic, and Postsolidification Fusion Zone Transformations. The Partially Melted Zone. The Weld Heat-Affected Zone. Weldability and Weld Testing. Closing Thoughts. Appendices. Index.
171 citations
TL;DR: In this paper, the results of macrographic analysis and micro-hardness testing indicated that sound joints can be obtained in the parameters range of rotational speed equal to 800-1500rpm and welding speed of 150-400mm/min, while axial force and tool geometry were kept constant.
171 citations
TL;DR: In this paper, the effect of TIG welding on corrosion behavior of 316L stainless steel in physiological solution was investigated with potentiodynamic polarization curves and X-ray diffraction analysis.
171 citations