Kinetics of the α →γ ′ stress-induced martensitic transformation in a Fe - Mn - Al - Ni shape memory bicrystal

被引：0

作者：

Vallejos, Juan Manuel ^{[1
]}

Guerrero, Lina Maria ^{[2
]}

Giordana, Maria Florencia ^{[2
]}

Malarria, Jorge Alberto ^{[2
]}

Requena, Guillermo ^{[3
,4
]}

Maawad, Emad ^{[5
]}

Schell, Norbert ^{[5
]}

Vila, Pere Barriobero- ^{[6
]}

机构：

[1] Univ Nacl Nordeste, Fac Ingn, RA-3500 Resistencia, Argentina

[2] Inst Fis Rosario, RA-2000 Rosario, Argentina

[3] German Aerosp Ctr, Inst Mat Res, D-51147 Cologne, Germany

[4] Rhein Westfal TH Aachen, Met Struct & Mat Syst Aerosp Engn, D-52062 Aachen, Germany

[5] Inst Mat Phys, Helmholtz Zentrum Hereon, D-21502 Geesthacht, Germany

[6] Tech Univ Catalonia, Dept Mat Sci & Engn, Barcelona 08019, Spain

来源：

MATERIALS LETTERS | 2024年 / 370卷

关键词：

Shape memory materials; Grain boundaries; X-ray techniques; FEMNALNI SINGLE-CRYSTALS; SUPERELASTIC RESPONSE; ORIENTATION; ALLOYS;

D O I：

10.1016/j.matlet.2024.136861

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Fe-Mn-Al-Ni pseudoelastic system has garnered interest for diverse engineering applications owing to its promising characteristics. The poor pseudoelasticity in polycrystals is generally attributed to activation of new martensite variants and the high density of dislocations close to austenite/martensite interface. High-energy synchrotron X-ray diffraction and microscopy studies on a Fe-Mn-Al-Ni bicrystal reveal the sequence of transformation, deformation mechanisms, and grain boundary effects on martensite nucleation, shedding light on its limited pseudoelasticity in polycrystalline configurations. The results highlight challenges in achieving pseudoelasticity in polycrystalline configurations due to disparities in deformation between grains and at grain boundaries.

引用

页数：4

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