Nanoscale mechanism and intrinsic structure related deformation of Ti-alloys

被引：25
作者：
Eckert, J. [1 ]
Das, J. [1 ]
Xu, W. [2 ]
Theissmann, R. [3 ]
机构：
[1] IFW Dresden, Inst Komplexe Mat, D-01171 Dresden, Germany
[2] Univ Melbourne, Dept Mech & Mfg Engn, Melbourne, Vic 3010, Australia
[3] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76133 Karlsruhe, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 493卷 / 1-2期
关键词：
Ti-base alloys; dendrite; nanoeutectic; plasticity; phase stability;
D O I：
10.1016/j.msea.2007.08.094
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A series of Ti-Nb-Ta-(In/Cr) and Ti-Fe-(Sn) alloys containing a bcc beta-Ti phase with a grain size ranging from the nanometer/ultrafine regime to the micrometer scale has been prepared by slow cooling from the melt. The plastic deformation behavior has been investigated under compression and the deformation-induced microstructure evolution was checked by X-ray diffraction, scanning and transmission electron microscopy. The data reveal that the underlying mechanisms related to plasticity or brittleness of the P-phase depends significantly on the supersaturation, the local lattice strain, the ease of dislocation slip, as well as twinning and diffusionless transformation triggering grain refinement. The intrinsic structure, the short-range order and the stability of the beta-Ti phase have a strong influence on the mode of plastic deformation of the investigated Ti-alloys. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：71 / 78
页数：8
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