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Journal ArticleDOI

Investigation on Microstructure and Mechanical Properties of Continuous and Pulsed Current Gas Tungsten Arc Welded alloy 600

01 Feb 2018-Vol. 310, Iss: 1, pp 012073
About: The article was published on 2018-02-01 and is currently open access. It has received 1 citations till now. The article focuses on the topics: Gas tungsten arc welding & Gas metal arc welding.
Citations
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TL;DR: In this article, an exhaustive overview of the residual stresses, microstructures, and material properties of the as-fabricated and post-manufactured treated wire arc additive manufacturing (WAAM) components are presented.
Abstract: Wire arc additive manufacturing (WAAM) technique became an emerging manufacturing technology because of its cost-effective in creating large-scale metal parts with moderately high deposition rates. Mainly, WAAM works through the utilization of heat source as an electric arc by melting the metal wire to build the three-dimensional metal parts in a layer-by-layer approach, which may significantly minimize the fabrication costs compared to powder and other additive manufacturing techniques such as laser and electron beam, similarly. This article reviews WAAM processes and methods and gives an exhaustive overview of the residual stresses, microstructures, and material properties of the as-fabricated and post-fabrication treated WAAM components. The typical defects during the fabrication of metal components by the WAAM process are residual stresses, deformity, porosity, and cracking. And also, methods on controlling residual stresses, improving material properties, and effects of post-processing treatments to enhance the part quality fabricated by using the WAAM process are recommended in this review. Finally, the measurement methods of residual stresses in the metal parts and FEA simulations in the WAAM are discussed. FEA simulations provide better insights on moving heat source model, temperature distributions, and residual stresses in the WAAM process. This article concludes that selecting process parameters affects the quality WAAM component during the deposition process. And also, approaches to improving the part quality are proposed. The materials fabrication issues in the WAAM processes were outlined, and the advanced WAMM processes were suggested to obtain high quality and defect-free WAAM parts.

18 citations

References
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Journal ArticleDOI
Masayuki Shimada1, Hiroyuki Kokawa1, Zhi Wang1, Yutaka S. Sato1, Isao Karibe1 
TL;DR: In this paper, the effects of process parameters, pre-strain, annealing temperature, etc. on grain boundary character distribution and intergranular corrosion in thermomechanical treatment were examined during grain boundary engineering of type 304 austenitic stainless steel.

517 citations

Journal ArticleDOI
TL;DR: Pulsed Nd-YAG laser welding characteristics of Inconel 718 sheet material (2.mm thick) were investigated in this article, where Weld microstructures and room temperature tensile properties were evaluated.

221 citations

Journal ArticleDOI
TL;DR: In this article, a thermodynamic and kinetic model was constructed to describe the development of the chromium depleted zone in Ni-Cr-Fe alloys heated in the range 773-1173 K.

116 citations

Journal ArticleDOI
TL;DR: In this article, the authors used polycrystalline cubic boron nitride (PCBN) tool for partially penetrated FSW of Inconel Alloy 600, and a defect-free weld was successfully produced.
Abstract: Friction stir welding (FSW) has been widely used to metals with moderate melting temperatures, primarily Al alloys. Recently, tool materials that withstand high stresses and temperatures necessary for FSW of materials with high melting temperatures have been developed. In the present study, polycrystalline cubic boron nitride (PCBN) tool was used for partially penetrated FSW of Inconel Alloy 600, and a defect-free weld was successfully produced. Microstructural characteristics, mechanical and corrosion properties in the weld were examined. The weld had better mechanical properties than the base material due to formation of fine grain structure in the stir zone, but exhibited slightly the lower corrosion resistance in a part of the stir zone and heat-affected zone (HAZ).

102 citations

Journal ArticleDOI
TL;DR: In this article, the effects of switching over from gas tungsten arc welding (GTAW) to pulsed current Gas Tungsten Arc Welding (PCGTAw) on the quality of joints produced in Hastelloy C-276 material were investigated.

78 citations