Journal Article

PUBDB-2021-02532

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png New Insights into the Intermartensitic Transformation and Over 11% Magnetic Field‐Induced Strain in 14 m Ni−Mn−Ga Martensite

Chulist, R. (Corresponding author)Extern* ; Pagounis, E. ; Czaja, P. ; Schell, N.Extern* ; Brokmeier, H.-G.Extern*

2021
Deutsche Gesellschaft für Materialkunde Frankfurt, M.

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Please use a persistent id in citations: doi:10.1002/adem.202100131

Abstract: Stress-induced intermartensitic phase transformation from 10 M to 14 M modulatedmartensite structure is characterized in Ni50.5Mn28.9Ga20.6 at%single crystals, with particular focus on periodic atomic shuffling by in situsynchrotron radiation diffraction. Under compression, along the [001] direction,at 6 MPa, the self-accommodated 10 M single crystal is found to transform to anearly single-variant state. Further stress increase up to 20 MPa triggers intermartensitictransformation to an intermediate, mixed martensite state.Intermartensitic transformation is hereby invoked at a considerably lower stressthan previously reported for NiMnGa alloys. However, the stress level appliedalong the [001] direction does not promote the complete 10 M!14 M martensitetransformation. The 14 M structure is then fully achievable, when a consecutivecompression along the [100] direction is applied. Such mechanically promoted14 M single crystals are stable at room temperature and yield about 11.4%magnetic-field induced strain—being the highest noted up to date for theNiMnGa system.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Helmholtz-Zentrum Hereon (Hereon)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2021

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; DEAL Wiley ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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