Multi-stage martensitic transformation in Ni-rich NiTi shape memory alloys

被引：34
|
作者：
Wang, Xiebin [1 ]
Verlinden, Bert [2 ]
Kustov, Sergey [3 ,4 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jingshi Rd 17923, Jinan 250061, Peoples R China
[2] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpark Arenberg 44,POB 2450, B-3001 Heverlee, Belgium
[3] Univ Illes Balears, Dept Fis, Cra,Valldemossa,km 7 5, E-07122 Palma de Mallorca, Spain
[4] ITMO Univ, 49 Kronverkskiy, St Petersburg 197101, Russia
来源：
FUNCTIONAL MATERIALS LETTERS | 2017年 / 10卷 / 01期
关键词：
NiTi; shape memory alloys; multi-stage martensitic transformation; aging; R-PHASE TRANSFORMATION; TI-NI; CONCENTRATION GRADIENTS; CYCLIC DEFORMATION; SINGLE-CRYSTALS; AGING TREATMENT; STRAIN FIELDS; BEHAVIOR; TEMPERATURE; PRECIPITATION;
D O I：
10.1142/S1793604717400045
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Precipitation hardening is an effective way to improve the functional stability of NiTi shape memory alloys. The precipitates, mainly Ni4Ti3, could be introduced by aging treatment in Ni-rich NiTi alloys. However, the presence of Ni4Ti3 precipitates could disturb the transformation behavior, resulting in the multi-stage martensitic transformation (MMT). With the presence of MMT, it is difficult to control the transformation behavior, and thus limits the applicability of NiTi alloys. In this work, previous efforts on explaining the observed MMT are summarized. The difficulties in developing a unified explanation are discussed, and a possible way to avoid the MMT is proposed.
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页数：8
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