《High-temperature_deformation_behavior_of_Ti60_titanium_alloy》.pdf

Materials Science and Engineering A 528 (2011) 4068–4074 Contents lists available at ScienceDirect Materials Science and Engineering A j o u rn al h omepage: w w w. elsev /locate/msea High-temperature deformation behavior of Ti60 titanium alloy Weiju Jia a , Weidong Zeng a,∗ , Yigang Zhou a , Jianrong Liu b , Qingjiang Wang b a State Key Laboratory of Solidification Processing, School of Materials, Northwestern Polytechnical University, Xi’an 710072, China b Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China a r t i c l e i n f o a b s t r a c t Article history: Isothermal compressions of near-alpha Ti60 alloy were carried out on a Gleeble-3800 simulator in the Received 14 November 2010 temperature range of 960–1110 ◦ C and strain rate range of 0.001–10.0 s−1. The high-temperature defor- Received in revised form 5 January 2011 mation behavior was characterized based on an analysis of the stress–strain behavior, kinetics and Accepted 31 January 2011 processing map. The flow stress behavior revealed greater flow softening in the two-phase field com- Available online 5 March 2011 pared with that of single-phase field. In two-phase field, flow softening was caused by break-up and globularization of lamellar as well as deformation heating during deformation. While in the single- Keywords: phase field, flow softening was caused by dynamic recovery and recrystallization. Using hy