Ductile ultrafine-grained Ti-based alloys with high yield strength

被引：90
作者：
Zhang, Lai-Chang
Lu, Hai-Bo
Mickel, Christine
Eckert, Jurgen
机构：
[1] IFW Dresden, Inst Komplexe Mat, D-01171 Dresden, Germany
[2] Inst Met Werkstoffe, D-01171 Dresden, Germany
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 05期
关键词：
D O I：
10.1063/1.2766861
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The authors report on ductile ultrafine-grained (Ti0.72Fe0.28)(100-x)Ta-x (0 <= x <= 4) alloys with not only high fracture strength but simultaneously high yield strength exceeding 2000 MPa along with distinct plasticity, which are superior to high-strength Ti-based bulk metallic glasses and bimodal composites. All alloys mainly consist of beta-Ti and FeTi solid solutions but display different microstructures. The alloys exhibit a high fracture strength > 2500 MPa and a high yield strength > 2000 MPa as well as large plasticity of similar to 5%-7.5%. The microstructure-property correlation of these ultrafine-grained alloys is discussed. (c) 2007 American Institute of Physics.
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