Studies on Weldability of Powder-Processed Fe-0.35P-0.15C Alloy Using Gas Tungsten Arc Welding ProcessReportar como inadecuado




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The objective of this study was to investigate the weldability of an iron-based powder metal alloyFe-P-C using the gas tungsten arc welding process GTAW with two different filler metals.Optical microscopy revealed that for the Fe-P-C alloys, the fusion-welded zone was free ofporosity and cracks. The thickness of the slab was 4 mm. The heat affected zone did not showexcessive hardness. The SEM image of the fracture specimen showed elongated dimples. X-Raymapping confirmed the absence of Fe3P. EPMA was used to determine the ability of carbon inpreventing the segregation of P to the grain boundaries. Tensile tests showed that the failures ofthe specimens occurred always in the base metal with tensile strength slightly superior to thevalue of unwelded samples. As a result, this investigation showed the feasibility of joining ironbasedpowder metal alloys by the GTAW process, especially while welding the Fe-P-C alloy.

KEYWORDS

Electron Microscopy; Hardness Measurement; Welding; Powder Metallurgy; Mechanical Characterization; Phosphoric irons

Cite this paper

Y. Mehta, S. Trivedi, K. Chandra and P. Mishra -Studies on Weldability of Powder-Processed Fe-0.35P-0.15C Alloy Using Gas Tungsten Arc Welding Process,- Journal of Minerals and Materials Characterization and Engineering, Vol. 9 No. 3, 2010, pp. 211-229. doi: 10.4236-jmmce.2010.93018.





Autor: Yashwant Mehta, Shefali Trivedi, K. Chandra, P.S. Mishra

Fuente: http://www.scirp.org/



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