Thermal Flow Deformation Behavior and Mechanism of As-Cast and As-Extruded Burn Resistant Titanium Alloy

Abstract:

Hot compressive deformation tests of burn resistant titanium alloy (Ti-35V-15Cr-Si-C) with initially as-cast and as-extruded microstructure were performed at deformation temperature between 900°C to 1200°C for as-cast and 900°C to 1150°C for as-extruded alloy, and strain rates between 10^-3 s^-1 to 1s^-1. The compressive true stress vs. true strain curves were measured, the deformation activation energy was calculated and the microstructures after deformation were studied. The results show that dynamic reversion is the primary soften mechanism of the burn resistant titanium alloy during hot deformation. At the higher strain rate ( =1s^-1), the ‘Necklace’ Dynamic Recrystallization will occur for as-cast alloy, and a Continuous Recrystallization will occur for as-extruded alloy. At the lower strain rates, both as-cast and as-extruded burn resistant titanium alloy display the continuous recrystallization. The extruded alloy presents larger dynamic recrystallization regions than that of the as-cast alloy.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 977-982
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.977
• Online since: June 2012
• Authors: Huan Ying Sun, Jing Xia Cao, Bao Wang, Xu Huang, Chun Xiao Cao
• Keywords: Burn Resistant Titanium Alloy, Deformation Mechanism, Dynamic Recrystallization (DRX), Dynamic Reversion, Flow Behavior

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