Table of Contents
Journal of Metallurgy
Volume 2011, Article ID 924032, 5 pages
Research Article

𝜢 β€³ Martensitic Twinning in Alpha + Beta Ti-3.5Al-4.5Mo Titanium Alloy

1Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
2Northwest Institute For Non-Ferrous Metal Research, 96 Weiyang Road, Xi'an 710016, China
3Cobham Mission Systems Division, 2734 Hickory Grove Road, Davenport, IA 52804, USA

Received 30 December 2010; Accepted 7 April 2011

Academic Editor: Chong Soo Lee

Copyright © 2011 Changfu Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The twinning structure of the orthorhombic 𝛼 ξ…ž ξ…ž martensite phase in alpha + beta Ti-3.5Al-4.5Mo (wt%) titanium alloy was studied using X-ray diffraction and transmission electron microscopy by water quenching from below transus temperatures. While water quenching from 910 ∘ C induced the formation of { 1 1 0 } ∘ twins, quenching from 840 ∘ C formed the 𝛼 ξ…ž ξ…ž martensite with { 1 1 1 } ∘ type I twins. The effect of the principle strains on the twinning structure was discussed. As compared to the previous studies, the principle strains play an important role in the formation of the twinning type.