Paper Title:

Microstructure Evolution of Near Gamma TiAl Intermetallic under Tensile Impact Loadings at High Temperatures

Periodical Advanced Materials Research (Volumes 146 - 147)
Main Theme Advances in Superalloys
Edited by Sihai Jiao, Zhengyi Jiang and Jinglong Bu
Pages 1553-1556
DOI 10.4028/www.scientific.net/AMR.146-147.1553
Citation Yu Wang et al., 2010, Advanced Materials Research, 146-147, 1553
Online since October, 2010
Authors Yu Wang, Xiang Zan, Yue Hui He, Yang Wang
Keywords High Strain Rate, High Temperature, Micro-Structure Evolution, TiAl Intermetallics
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Abstract

The effect of temperature and strain rate on the mechanical behavior and microstructure evolution of Near Gamma Ti-46.5Al-2Nb-2Cr (NG TiAl) was investigated at temperatures ranging from room temperatures to 840 under strain rates of 0.001, 320, 800 and 1350s-1. The TEM analysis indicated that deformation twinning and stacking fault are the main deformation modes under dynamic loadings and dislocation slip is another important deformation mode under quasi-static loadings. The density of deformation twinning and/or stacking fault increases with the increased temperature and strain rate.