In Situ Synchrotron Diffraction Assessment of Reversibility of the Martensitic Transformation in Single-Crystalline Co-Ni-Ga Shape Memory Alloy Under Torsion

被引：0

作者：

Lauhoff, C. ^{[1
,2
]}

Degener, S. ^{[1
]}

Bolender, A. ^{[1
]}

Liehr, A. ^{[1
]}

Huebner, L. ^{[1
]}

Frenck, J. -m. ^{[1
]}

Molotnikov, A. ^{[2
]}

Niendorf, T. ^{[1
]}

机构：

[1] Univ Kassel, Inst Mat Engn, Monchebergstr 3, D-34125 Kassel, Germany

[2] RMIT Univ, RMIT Ctr Addit Mfg, Sch Engn, Melbourne, Vic 3000, Australia

来源：

SHAPE MEMORY AND SUPERELASTICITY | 2024年 / 10卷 / 03期

关键词：

Shape memory alloy; Pseudoelasticity; Martensitic transformation; Synchrotron diffraction; In situ testing; Torsion; X-RAY-DIFFRACTION; PHASE-TRANSFORMATION; STRESS; BEHAVIOR; PSEUDOELASTICITY; SUPERELASTICITY; MICROSTRUCTURE; STABILIZATION; TENSION;

D O I：

10.1007/s40830-024-00496-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Heusler-type Co-Ni-Ga shape memory alloys attracted significant attention due to their excellent functional properties in single-crystalline state under both compressive and tensile loading. The present study investigates the superelastic deformation behavior under torsion. Using a newly installed torsion testing setup, in situ synchrotron diffraction was carried out on single-crystalline material in order to investigate the martensitic phase transformation. Incremental deformation experiments reveal a fully reversible martensitic transformation under torsional loading at room temperature, leading to excellent strain recovery after deformation to 6.5% shear strain. Furthermore, relevant aspects towards the analysis of powder diffraction data obtained for single-crystalline material in transmission mode under torsional loading are presented and critically discussed.

引用

页码：326 / 333

页数：8

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