期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 58, 期 -, 页码 100-106出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2020.03.071
关键词
Ni-Mn-In; Shape memory alloy; Martensitic transformation; Magnetic properties; First-principles calculations
资金
- National Natural Science Foundation of China [51771044]
- Natural Science Foundation of Hebei Province [E2019501061]
- Fundamental Research Funds for the Central Universities [N2023027]
- Programme of Introducing Talents of Discipline Innovation to Universities 2.0 (111 Project of China 2.0) [BP0719037]
- LiaoNing Revitalization Talents Program [XLYC1802023]
Composition dependence of martensitic transformations as well as the magnetic properties for the Ni2Mn1+xIn1-x(0.25 <= x <= 0.58) alloys were investigated by using the first-principles calculations. Key results demonstrate that the stability of parent austenite (A) decreases gradually with increasing Mn content whilst it is opposite for the martensitic phase. This causes the total energy difference between the austenite and martensite phases increscent with increasing Mn contents. When x = 0.33, the martensite transformation during cooling is PA -> FA -> NM. When x >= 0.42, an intermartensitic transformation occurs from modulated 6 M martensite to non-modulated (NM) martensite with the martensite transformation sequence of PA -> FA -> 6M -> NM. The martensitic transformation from austenite to martensite accompanies the transition from ferromagnetic to ferrimagnetic state. This is a typical magneto-structural coupling transformation. The analysis of the density of states demonstrates that the Ni 3d state plays an important role in the phase stability. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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