Effect of cooling rate on the phase transformation behavior and mechanical properties of Ni-rich NiTi shape memory alloy

被引：71

作者：

Motemani, Y. ^{[1
]}

Nili-Ahmadabadi, M. ^{[2
]}

Tan, M. J. ^{[1
]}

Bornapour, M. ^{[2
]}

Rayagan, Sh. ^{[2
]}

机构：

[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

[2] Univ Tehran, Sch Met & Mat Engn, Fac Engn, Tehran 14395731, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 469卷 / 1-2期

关键词：

NiTi shape memory alloy; A(f) temperature; Martensite; Austenite; Cooling rate; Differential scanning calorimetry; NEAR-EQUIATOMIC NITI; HYBRID-COMPOSITES; TINI MARTENSITE; SMART SYSTEMS; PART II;

D O I：

10.1016/j.jallcom.2008.01.153

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：

TiNi alloy is a well-known shape memory alloy and has been widely used for bio-medical, mechanical and electrical applications. In this study, a Ni-rich NiTi alloy was prepared by vacuum arc melting in a water-cooled copper crucible. Three samples of this alloy were heated to 1000 degrees C and cooled in three media: furnace, water, and dry-ice bath. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), hardness measurement and tensile test were carried out to investigate the effect of cooling rate on transformation temperature and mechanical properties. The results show that Ni3Ti intermetallic compounds have a great influence on martensitic phase transformation temperature. These tests clearly showed the correlation between cooling rate and properties of the alloy. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：164 / 168

页数：5

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