Coexisting Multiple Martensites in Ni57-xMn21+xGa22 Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition

Huang, Lian; Cong, Daoyong; Wang, Mingguang; Wang, Yandong

doi:10.3390/met11101534

Title: Coexisting Multiple Martensites in Ni_57-xMn_21+xGa₂₂ Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition

Abstract

A comprehensive study of the crystal structure and phase transition as a function of temperature and composition in Ni_57–xMn_21+xGa₂₂ (x = 0, 2, 4, 5.5, 7, 8) (at. %) magnetic shape memory alloys was performed by a temperature-dependent synchrotron X-ray diffraction technique and transmission electron microscopy. A phase diagram of this Ni_57–xMn_21+xGa₂₂ alloy system was constructed. The transition between coexisting multiple martensites with monoclinic and tetragonal structures during cooling was observed in the Ni_51.5Mn_26.5Ga₂₂ (x = 5.5) alloy, and it was found that 5M + 7M multiple martensites coexist from 300 K to 160 K and that 5M + 7M + NM multiple martensites coexist between 150 K and 100 K. The magnetic-field-induced transformation from 7M martensite to NM martensite at 140 K where 5M + 7M + NM multiple martensites coexist before applying the magnetic field was observed by in situ neutron diffraction experiments. The present study is instructive for understanding the phase transition between coexisting multiple martensites under external fields and may shed light on the design of novel functional properties based on such phase transitions.

Authors:

Huang, Lian ^[1]; Cong, Daoyong ^[2]; Wang, Mingguang ^[3]; Wang, Yandong ^[2]

Hunan Inst. of Engineering, Xiangtan (China)
Univ. of Science and Technology Beijing (China)
Northeastern Univ., Shenyang (China)

Publication Date:: Sun Sep 26 00:00:00 EDT 2021

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1841199

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Metals

Additional Journal Information:: Journal Volume: 11; Journal Issue: 10; Journal ID: ISSN 2075-4701

Publisher:: MDPI

Country of Publication:: United States

Language:: ENGLISH

Subject:: 36 MATERIALS SCIENCE; magnetic shape memory alloy; martensitic transformation; external-field-induced structural transformation

Citation Formats


                    Huang, Lian, Cong, Daoyong, Wang, Mingguang, and Wang, Yandong. Coexisting Multiple Martensites in Ni57-xMn21+xGa22 Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition.  United States: N. p., 2021. 
Web.  doi:10.3390/met11101534.

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                    Huang, Lian, Cong, Daoyong, Wang, Mingguang, & Wang, Yandong. Coexisting Multiple Martensites in Ni57-xMn21+xGa22 Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition.  United States.  https://doi.org/10.3390/met11101534

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                    Huang, Lian, Cong, Daoyong, Wang, Mingguang, and Wang, Yandong. Sun .  
"Coexisting Multiple Martensites in Ni57-xMn21+xGa22 Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition".  United States.  https://doi.org/10.3390/met11101534.  https://www.osti.gov/servlets/purl/1841199.

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@article{osti_1841199,

  title        = {Coexisting Multiple Martensites in Ni57-xMn21+xGa22 Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition},

  author       = {Huang, Lian and Cong, Daoyong and Wang, Mingguang and Wang, Yandong},

  abstractNote = {A comprehensive study of the crystal structure and phase transition as a function of temperature and composition in Ni57–xMn21+xGa22 (x = 0, 2, 4, 5.5, 7, 8) (at. %) magnetic shape memory alloys was performed by a temperature-dependent synchrotron X-ray diffraction technique and transmission electron microscopy. A phase diagram of this Ni57–xMn21+xGa22 alloy system was constructed. The transition between coexisting multiple martensites with monoclinic and tetragonal structures during cooling was observed in the Ni51.5Mn26.5Ga22 (x = 5.5) alloy, and it was found that 5M + 7M multiple martensites coexist from 300 K to 160 K and that 5M + 7M + NM multiple martensites coexist between 150 K and 100 K. The magnetic-field-induced transformation from 7M martensite to NM martensite at 140 K where 5M + 7M + NM multiple martensites coexist before applying the magnetic field was observed by in situ neutron diffraction experiments. The present study is instructive for understanding the phase transition between coexisting multiple martensites under external fields and may shed light on the design of novel functional properties based on such phase transitions.},

  doi          = {10.3390/met11101534},

  journal      = {Metals},

  number       = 10,

  volume       = 11,

  place        = {United States},

  year         = {Sun Sep 26 00:00:00 EDT 2021},

  month        = {Sun Sep 26 00:00:00 EDT 2021}

}

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Title: Coexisting Multiple Martensites in Ni57-xMn21+xGa22 Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition

Abstract

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Title: Coexisting Multiple Martensites in Ni_57-xMn_21+xGa₂₂ Ferromagnetic Shape Memory Alloys: Crystal Structure and Phase Transition

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