Microstructure and martensitic transformation in quaternary NiTiHfV alloy

被引：1
作者：
Shuitcev, Aleksandr, V [1 ]
Ren, Yi [1 ]
Zhang, Ze-zhong [1 ]
Vasin, Roman N. [2 ]
Sun, Bin [3 ]
Li, Li
Tong, Yun-xiang [1 ]
机构：
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Int Joint Lab Adv Nanomat Heilongjiang Prov, Harbin 150001, Peoples R China
[2] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Russia
[3] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Ctr Testing & Anal, Harbin 150001, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2024年 / 34卷 / 10期
基金：
中国国家自然科学基金;
关键词：
shape memory alloys; NiTiHfV; H-phase; Laves phase; martensitic transformation; SHAPE-MEMORY ALLOY; NI-RICH NITIHF; PHASE-TRANSFORMATION; NEUTRON-DIFFRACTION; BEHAVIOR; CU;
D O I：
10.1016/S1003-6326(24)66608-2
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of age hardening on the microstructure, martensitic transformation behavior, and shape memory properties of the (Ni50Ti30Hf20)95V5 alloy was investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, differential scanning calorimetry, microhardness, and bending tests. The results demonstrate a significant influence of V addition on the microstructure of the alloy. V addition leads to the formation of a (Ni,V)2(Ti,Hf)-type Laves phase, which coexists with B 19 ' martensite at room temperature. Aging at 550 degrees C results in precipitation hardening due to the formation of nano-scale orthorhombic H-phase, with the peak hardness observed after 3 h of aging. The alloy at peak hardness state exhibits higher transformation strain and lower unrecovered strain compared to the solution-treated sample. The aged sample achieves a maximum transformation strain of 1.56% under 500 MPa.
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页码：3282 / 3294
页数：13
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