Enhancement of TiZr ductility by hcp-fcc martensitic transformation after severe plastic deformation

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• 作者：Zhibo Zhang ; Ming Li ; Defeng Guo ; Yindong Shi ; Xiangyi Zhang ; Hans-Eckhardt Schaefer
• 关键词：Martensitic transformations ; Ductility ; Lattice distortion ; Mechanical characterization ; Titanium alloys
• 刊名：Materials Science and Engineering: A
• 出版年：31 January, 2014
• 年：2014
• 卷：594
• 期：Complete
• 页码：321-323
• 全文大小：760 K

文摘

In the present paper we identify by x-ray diffraction and electron microscopy the athermal formation of the fcc phase, which is beneficial for a high ductility in TiZr, after severe plastic deformation (SPD) at an ambient temperature. For true strains e鈮?.2, the lattice distortions increase, favoring more martensitic formation of the fcc phase. This coincides with the enhancement of the ductility which is attributed to the higher number of slip systems in the fcc phase than in the hcp phase.