Publication Date:
2015-08-08
Description:
The TC8 titanium alloy was isothermally compressed at 1133 K and 1213 K in the (?+?) two phase region. The microstructural evolution and restoration mechanism in the ? and ? phases were characterized by optical microscopy and transmission electron microscopy. The results show a significant effect of phase content on the microstructural evolution and restoration mechanism. The grain refinement occurs in the ? phase at both temperatures, but in the ? phase only at the higher temperature of 1213 K. This difference in microstructural evolution is attributed to the different temperature dependence of restoration mechanisms in the two phases. A significant increase in the volume fraction of ? phase makes the restoration mechanism in the ? phase change from dynamic recovery (DRV) to dynamic recrystallization (DRX), which subsequently induces the ? grain refinement.
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
