Effect of thermal treatment and ball milling on microstructure and phase transformation of Ni-Mn-Ga-Nb alloys

被引：2
作者：
Wang, Jun-song [1 ,2 ]
Tian, Bing [1 ,2 ]
Tong, Yun-xiang [1 ,2 ]
Chen, Feng [1 ,2 ]
Li, Li [1 ,2 ]
机构：
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Inst Mat Proc & Intelligent Mfg, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Engn Univ, Ctr Biomed Mat & Engn, Harbin 150001, Heilongjiang, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2019年 / 29卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Ni-Mn-Ga-Nb alloy; thermal treatment; ball milling; microstructure; phase transformation; FIELD-INDUCED STRAIN; MARTENSITIC-TRANSFORMATION; MECHANICAL-PROPERTIES; HEAT-TREATMENT; BEHAVIOR; TEMPERATURE; PROPERTY;
D O I：
10.1016/S1003-6326(19)65118-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
To clarify phase transformation evolution of Nb-doped Ni-Mn-Ga bulk alloys after aging and ball milling, the microstructure and phase transformation of the aged and ball-milled dual-phase Nb-doped Ni-Mn-Ga alloys were investigated by SEM, EDS, XRD, DSC and susceptibility measurements. The as-cast alloys were mainly composed of the second phase with layer-shape and presented a reduced martensitic transformation with increasing the second phase content. The second phase transformed from layer-shape to dense bar-shape and the martensitic transformation was enhanced after being quenched at 1173 K. After aging at 673 and 873 K, the 3% Nb alloy with less second phase exhibited a single-step phase transformation, whereas the 6% Nb and 9% Nb alloys with more second phase exhibited a two-step martensitic transformation and Curie transition. The martensitic transformation and Curie transition of the as-milled dual-phase particles disappeared and were retrieved after annealing at 1073 K due to the recovery of high ordered structure of the matrix.
引用
收藏
页码：2117 / 2127
页数：11
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