Effects of Strain Rate on Mechanical Properties and Microstructure of V-5Cr-5Ti Alloy
|Periodical||Materials Science Forum (Volumes 654 - 656)|
|Edited by||Jian-Feng Nie and Allan Morton|
|Citation||Wen Jun Hu et al., 2010, Materials Science Forum, 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|
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.