Linear Friction Welding of Ti-6Al-4V Alloy: Microstructure Characterization
Ti-6Al-4V was successfully jointed by linear friction welding (LFW). A sound weld of thickness of 65-115 $m was obtained under the present conditions. The weld consisted of the superfine α+β structure, which is associated with the rapid heating and cooling processes involved in LFW. The thermomechanically affected zone (TMAZ) was limited and comprised of the severely deformed α and β grains. In the flash, a gradual microstructure was formed from the weld edge to the flash edge. A martensite structure (α’) was formed besides the acicular α+β in the flash edge owing to the fast cooling rate.
Changhee Lee, Jong-Bong Lee, Dong-Hwan Park and Suck-Joo Na
T. J. Ma et al., "Linear Friction Welding of Ti-6Al-4V Alloy: Microstructure Characterization", Materials Science Forum, Vols. 580-582, pp. 405-408, 2008