Microstructural characterization on martensitic α" phase in Ti-Nb-Pd alloys

被引：11

作者：

Wu, S. Q. ^{[1
,2
,3
]}

Ping, D. H. ^{[1
]}

Yamabe-Mitarai, Y. ^{[1
]}

Kitashima, T. ^{[1
]}

Li, G. P. ^{[2
]}

Yang, R. ^{[2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Being 100039, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷

关键词：

Metals and alloys; beta-Ti alloy; Martensitic transformation; Microstructure; SHAPE-MEMORY BEHAVIOR; TRANSFORMATIONS; OMEGA;

D O I：

10.1016/j.jallcom.2011.12.152

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The alloying effect of Pd on the martensitic transformation behavior in Ti-Nb alloys has been systematically investigated using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The composition field of the orthorhombic alpha '' martensite is determined on the Ti-Nb-Pd isothermal section, and appears close to the Ti-Nb edge. The addition of small amounts of Pd affects the lattice parameters of the alpha '' significantly. It was noticed that increasing Pd content will increase a but decrease b value of the alpha '' while c remain almost constant. Such variations could make the martensitic transformation easier and a fully martensitic structure containing single alpha '' has been detected by XRD and TEM in a Ti-18.2Nb-0.5Pd (at.%) alloy. Transformation twinning of the (1 1 0)(alpha '') type was observed in the transformed martensite although the density is low. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：S423 / S426

页数：4

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