Effect of ternary alloying elements on the shape memory behavior of Ti-Ta alloys

被引：117

作者：

Buenconsejo, Pio John S. ^{[1
]}

Kim, Hee Young ^{[1
]}

Miyazaki, Shuichi ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan

来源：

ACTA MATERIALIA | 2009年 / 57卷 / 08期

关键词：

Ti Ta; Shape memory alloy; omega phase; beta Phase; Aging; OMEGA-PHASE-TRANSFORMATION; METASTABLE BETA-PHASE; MO-GA ALLOYS; MECHANICAL-PROPERTIES; MARTENSITIC-TRANSFORMATION; TITANIUM-ALLOYS; HEAT-TREATMENT; SN ALLOYS; ZR ALLOYS; ADDITIONS;

D O I：

10.1016/j.actamat.2009.02.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of ternary alloying elements (X = V, Cr, Fe, Zr, Hf, Mo, Sn, Al) on the shape memory behavior of Ti 30Ta-X alloys was investigated. All the alloying elements decreased the martensitic transformation temperatures. The decrease in the martensitic transformation start (M-s) temperature due to alloying was affected by the atomic size and number of valence electrons of the alloying element. A larger number of valence electrons and a smaller atomic radius of an alloying element decreased the M-s more strongly. The effect of the alloying elements on suppressing the aging effect on the shape memory behavior was also investigated. It was found that the additions of Sn and Al to Ti-Ta were effective in suppressing the effect of aging on the shape memory behavior, since they strongly suppress the formation of omega phase during aging treatment. For this reason the Ti 30Ta 1al and Ti-30Ta-1Sn alloys exhibited a stable high-temperature shape memory effect during thermal cycling. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2509 / 2515

页数：7

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