Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)

The Korean Welding and Joining Society (대한용접접합학회)
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A Study of Weld Cracking Susceptibility of Gamma Titanium Aluminides

Gamma Titanium Aluminide의 용접균열 감수성에 관한 연구

  • ;
  • W.A. Baeslack III (The Ohio State University) ;
  • T.J. Kelly (General Electric Aircraft Engines)
  • 이종섭 (산업과학기술연구소 철강제품부문 접합가공팀) ;
  • ;
  • Published : 1995.10.01
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Abstract

Five cast gamma titanium aluminides, Ti-45~48%Al-2%Nb-2%Cr (nominal composition in at. %), were laser welded and their weld cracking susceptibilities were evaluated. Laser power, traversing rate and preheat temperature were systematically varied to generate a series of welds exhibiting a wide range of cooling rate ($100^{\circ}C/s-10,000^{\circ}C/s$). As Al content increased and the weld cooling rate decreased, solidification cracking susceptibility increased while solid-state cracking susceptibility decreased. Through laser beam energy input control and preheat, it was determined possible to produce high quality laser welds.

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