Microstructural Evolution of Localized Shear Bands Induced during Explosion in Ti-6Al-4V Alloy

• 作 者: M.A.Meyers
• 机 构: Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, C
• 出 处: Journal of Materials Science & Technology
• 发表日期: 2003年05期
• 关键词: explosion bands thick grains cylinder Shear twins localized straight details

Microstructures of the localized shear bands generated during explosion with a thick-walled cylinder specimen inTi-6Al-4V allly,were characterized by TEM and SEM.The results show that the twinning is a major mode ofdeformation,and the distortion-free grains in the bands with the size of 10 μm in diameter were proposed to be there-crystallization during dynamic explosion.The further observations show that the α→α_2 phase transformationmay occur in the bands,and this kind of transformation could be confirmed by its dark field image and electrondiffraction analysis.Analysis shows that there is specified orientation between the α and α_2 Phases.

Microstructures of the localized shear bands generated during explosion with a thick-walled cylinder specimen in Ti-6A1-4V allly, were characterized by TEM and SEM. The results show that the twinning is a major mode of deformation, and the distortion-free grains in the bands with the size of 10 μm in diameter were proposed to be there-crystallization during dynamic explosion. The further observations show that the α → α_2 phase transformationmay occur in the bands, and this kind of transformation could be confirmed by its dark field image and electrondiffraction analysis. Analysis shows that there is a specified orientation between the α and α_2 Phases.