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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25 May 2003-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, tool wear and the rate of wear for hardened, steel, right-hand screws rotating at 1000 rpm in the friction-stir welding of Al 6061+20 vol.%Al2O3 particles were observed to decrease for increasing weld or traverse speeds.
Abstract: Tool wear and the rate of wear for hardened, steel, right-hand screws rotating at 1000 rpm in the friction-stir welding of Al 6061+20 vol.%Al2O3 particles were observed to decrease for increasing weld or traverse speeds. When sufficiently long traverse distances were reached, tool wear became small or negligible, and an optimized tool shape emerged. This shape was slightly different at 6 and 9 mm s−1 weld speeds but in each case a self-optimized tool shape emerged. This self-optimizing wear phenomena and tool shape result by counter motions of solid-state flow regimes which depend upon both tool rotation speed and actual weld traverse speed. Although sound, porosity-free welds are obtained with both the unworn, threaded pin tool and the worn, unthreaded pin tool, microstructures vary and the worn pin tool produced a narrower heat affected zone with less drop in hardness than the threaded pin tool.
150 citations
05 Dec 2005-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the effect of Nd:YAG laser welding on the mechanical and functional properties of Ni-51 at% Ti alloy was investigated in martensitic conditions.
Abstract: The present paper reports the effect of Nd:YAG laser welding on the mechanical and functional properties of Ni–51 at% Ti alloy The specimens were prepared from thin sheets and tested in martensitic conditions The mechanical and shape memory effects of both welded and unwelded material (reference) were measured using standard tensile tests and thermo-mechanical cycles Differential scanning calorimeter investigations were carried out to determine the phase transformation temperatures Micro-hardness tests and microscopic investigations were performed in order to evaluate the extension of the heat affected zone and the melting zone Finally, a systematic comparison of the results between welded and reference specimens was carried out
150 citations
TL;DR: In multipass welding, the intercritically reheated coarse grained heat affected zone (HAZ) demonstrates the worst toughness in the welded joint, since it contains a high carbon martensite w...
Abstract: In multipass welding, the intercritically reheated coarse grained heat affected zone (HAZ) demonstrates the worst toughness in the welded joint, since it contains a high carbon martensite w...
149 citations
TL;DR: In this article, the feasibility of friction stir welding (FSW) for joining of AA2124/SiC/25p composite materials has been demonstrated and the weld nugget exhibits the relatively homogeneous SiC particle distributions but has fine particle density bands.
149 citations
TL;DR: In this paper, the microstructure and properties of aluminium-zinc coated steel lap joints made by a modified metal inert gas CMT welding-brazing process was investigated, and it was found that the nature and the thickness of the high-hardness intermetallic compound layer formed at the interface between the steel and the weld metal during the welding process varied with the heat inputs.
147 citations