Annealing effects on the structural and magnetic properties of off-stoichiometric Fe-Mn-Ga ferromagnetic shape memory alloys

Chen, Yan; Bei, Hongbin; Dela Cruz, Clarina R; Wang, Yandong; An, Ke

doi:10.1016/j.matdes.2016.04.098

Title: Annealing effects on the structural and magnetic properties of off-stoichiometric Fe-Mn-Ga ferromagnetic shape memory alloys

Abstract

Annealing plays an important role in modifying structures and properties of ferromagnetic shape memory alloys (FSMAs). The annealing effect on the structures and magnetic properties of off-stoichiometric Fe₄₅Mn₂₆Ga₂₉ FSMA has been investigated at different elevated temperatures. Rietveld refinements of neutron diffraction patterns display that the formation of the γ phase in Fe₄₅Mn₂₆Ga₂₉ annealed at 1073 K increases the martensitic transformation temperature and reduces the thermal hysteresis in comparison to the homogenized sample. The phase segregation of a Fe-rich cubic phase and a Ga-rich cubic phase occurs at the annealing temperature of 773 K. The atomic occupancies of the alloys are determined thanks to the neutron's capability of differentiating transition metals. The annealing effects at different temperatures introduce a different magnetic characteristic that is associated with distinctive structural changes in the crystal.

Authors:

Chen, Yan ^[1]; Bei, Hongbin ^[1]; Dela Cruz, Clarina R ^[1]; Wang, Yandong ^[2]; An, Ke ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Beijing Institute of Technology, China; Beijing Inst. of Technology (China)

Publication Date:: Sat May 07 00:00:00 EDT 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1254789

Alternate Identifier(s):: OSTI ID: 1326429

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Materials & Design

Additional Journal Information:: Journal Volume: 104; Journal ID: ISSN 0264-1275

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Chen, Yan, Bei, Hongbin, Dela Cruz, Clarina R, Wang, Yandong, and An, Ke. Annealing effects on the structural and magnetic properties of off-stoichiometric Fe-Mn-Ga ferromagnetic shape memory alloys.  United States: N. p., 2016. 
Web.  doi:10.1016/j.matdes.2016.04.098.

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                    Chen, Yan, Bei, Hongbin, Dela Cruz, Clarina R, Wang, Yandong, & An, Ke. Annealing effects on the structural and magnetic properties of off-stoichiometric Fe-Mn-Ga ferromagnetic shape memory alloys.  United States.  https://doi.org/10.1016/j.matdes.2016.04.098

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                    Chen, Yan, Bei, Hongbin, Dela Cruz, Clarina R, Wang, Yandong, and An, Ke. Sat .  
"Annealing effects on the structural and magnetic properties of off-stoichiometric Fe-Mn-Ga ferromagnetic shape memory alloys".  United States.  https://doi.org/10.1016/j.matdes.2016.04.098.  https://www.osti.gov/servlets/purl/1254789.

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@article{osti_1254789,

  title        = {Annealing effects on the structural and magnetic properties of off-stoichiometric Fe-Mn-Ga ferromagnetic shape memory alloys},

  author       = {Chen, Yan and Bei, Hongbin and Dela Cruz, Clarina R and Wang, Yandong and An, Ke},

  abstractNote = {Annealing plays an important role in modifying structures and properties of ferromagnetic shape memory alloys (FSMAs). The annealing effect on the structures and magnetic properties of off-stoichiometric Fe45Mn26Ga29 FSMA has been investigated at different elevated temperatures. Rietveld refinements of neutron diffraction patterns display that the formation of the γ phase in Fe45Mn26Ga29 annealed at 1073 K increases the martensitic transformation temperature and reduces the thermal hysteresis in comparison to the homogenized sample. The phase segregation of a Fe-rich cubic phase and a Ga-rich cubic phase occurs at the annealing temperature of 773 K. The atomic occupancies of the alloys are determined thanks to the neutron's capability of differentiating transition metals. The annealing effects at different temperatures introduce a different magnetic characteristic that is associated with distinctive structural changes in the crystal.},

  doi          = {10.1016/j.matdes.2016.04.098},

  journal      = {Materials & Design},

  number       = ,

  volume       = 104,

  place        = {United States},

  year         = {Sat May 07 00:00:00 EDT 2016},

  month        = {Sat May 07 00:00:00 EDT 2016}

}

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https://doi.org/10.1016/j.matdes.2016.04.098

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journal, January 2015

First In Situ Lattice Strains Measurements Under Load at VULCAN
journal, October 2010

EXPGUI , a graphical user interface for GSAS
journal, April 2001

Influence of annealing on magnetic field-induced structural transformation and magnetocaloric effect in Ni–Mn–In–Co ribbons
journal, September 2009

Influence of annealing on martensitic transformation and magnetic entropy change in Ni37.7Co12.7Mn40.8Sn8.8 magnetic shape memory alloy ribbon
journal, March 2015

Investigation on martensitic transformation behavior, microstructures and mechanical properties of Fe-doped Ni–Mn–In alloys
journal, May 2009

Influence of aging on phase transformation and microstructure of Ni 50.3 Ti 29.7 Hf 20 high temperature shape memory alloy
journal, December 2014

Structure and magnetic properties of low-temperature annealed Ni-Mn-Al alloys
journal, May 2013

Structure changes of Co–Ni–Al ferromagnetic shape memory alloys after vacuum annealing and hot rolling
journal, January 2008

Prediction of fully compensated ferrimagnetic spin-gapless semiconducting FeMnGa/Al/In half Heusler alloys
journal, May 2019

A variable pole magnet
journal, January 2018

First-Principles Study on a New All-d-Metal Full-Heusler-Based Shape-Memory Alloy Cd ₂ MnPd
journal, September 2019

Effect of annealing on interior Vickers hardness and surface work function of light alloys
journal, September 2019