Research on Hot Compressive Behavior of Ti-5Mo-5V-1Cr-3Al Alloy
CUI Xue-fei1, MI Xu-jun2, LIN Chen-guang1, HUI Song-xiao2, WEI Yan-guang1, TAO Hai-ming1
1. Powder Metallurgy and Special Materials Research Department, General Research Institute for Nonferrous Metals, Beijing 100088, China;
2. State Key Laboratory for Fabrication & Processing of Non-ferrous Metals, General Research Institute for Nonferrous Metals, Beijing 100088, China
Abstract：Isothermal compression test was carried out for Ti-5Mo-5V-1Cr-3Al (abbreviated as 1Cr) alloy in the temperature range of 700-900℃ and in the strain rate range of 0.001-1s-1. The results show that the flow stress is sensitive to the deformation temperature and the strain rate. Dynamic recrystallization occurs in the temperature range of 700-800℃. In the temperature range of 800-900℃, multi-peaks stress dynamic recrystallization exhibits in the low strain rate of 0.001s-1 and dynamic recovery exhibits in the strain rate range of 0.01-1s-1. The flow stress behaviors of Ti-5Mo-5V-1Cr-3Al alloy during the isothermal compression could be expressed by the Arrhenius constitutive equation including Zener-Holomon parameters. The hot deformation activation energy is 456kJ/mol. The metallographic results indicate that the dynamic behavior of the material in hot compression process is affected by not only the rate and the temperature of the deformation, but also the microstructure and phase structure of the material. During hot compression deformation under a low strain rate of 0.001s-1, the alloy presents the dynamic recrystallization behavior even near the phase transition point or the higher temperature (800-900℃), which is closely related to the martensitic transformation induced by the strain. The precipitation of the martensite promotes dynamic recrystallization behavior during the hot deformation.
崔雪飞, 米绪军, 林晨光, 惠松晓, 魏衍广, 陶海明. Ti-5Mo-5V-1Cr-3Al合金的热压缩变形行为研究[J]. 材料工程, 2013, 0(12): 19-26.
CUI Xue-fei, MI Xu-jun, LIN Chen-guang, HUI Song-xiao, WEI Yan-guang, TAO Hai-ming. Research on Hot Compressive Behavior of Ti-5Mo-5V-1Cr-3Al Alloy. Journal of Materials Engineering, 2013, 0(12): 19-26.
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2013, Vol. 0 
