Effects of Strain Rate on Mechanical Properties and Microstructure of V-5Cr-5Ti Alloy

Abstract:

In this work the static and dynamic tensile properties of vanadium alloy V-5Cr-5Ti were investigated at strain rates ranged from 3.3x10-5/s to 1.2x102/s. The material microstructures were analyzed using optical microscope, SEM, TEM, XRD and EDS. Results show that the yield strength a increases with strain rate. The brittle-ductile transition strain-rate is about 101/s to102/s. At room temperature the tensile fracture at a low strain rate occurs via mixed modes of microvoid aggregating and transgranular cracking; at high strain rate the fracture occurs via a brittle mode. The analysis by TEM, XRD and EDX shows the existence of lath martensite, and on there exits precipitate phase of Ti(O,C, N) in grain boundaries.

• Periodical: Materials Science Forum (Volumes 654-656)
• Pages: 2535-2538
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.654-656.2535
• Online since: June 2010
• Authors: Wen Jun Hu, Xi Cheng Huang, Fang Ju Zhang, Jun Mei, Yi Xia Yan, Yong Mei Chen
• Keywords: Mechanical Property, Microstructure, Strain Rate, V-5Cr-5Ti, Vanadium Alloy

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