Martensite aging in ⟨001⟩ oriented Co49Ni21Ga30 single crystals in tension

被引：10

作者：

Lauhoff, C. ^{[1
]}

Krooss, P. ^{[1
]}

Langenkaemper, D. ^{[2
]}

Somsen, C. ^{[2
]}

Eggeler, G. ^{[2
]}

Kireeva, I. ^{[3
]}

Chumlyakov, Y. I. ^{[3
]}

Niendorf, T. ^{[1
]}

机构：

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

[2] Ruhr Univ Bochum, Inst Werkstoffe, D-44801 Bochum, Germany

[3] Tomsk State Univ, Siberian Phys Tech Inst, Novosobornay Sq 1, Tomsk 634050, Russia

来源：

FUNCTIONAL MATERIALS LETTERS | 2018年 / 11卷 / 02期

关键词：

High-temperature shape memory alloys; actuation; SIM aging; Co-Ni-Ga; martensite stabilization; SHAPE-MEMORY ALLOYS; CO-NI-GA; COMPRESSIVE STRESS; TEMPERATURE; STABILIZATION; BEHAVIOR; PSEUDOELASTICITY; MICROSTRUCTURE;

D O I：

10.1142/S1793604718500248

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co-Ni-Ga high-temperature shape memory alloys (HT-SMAs) are well-known candidate materials for damping applications at elevated temperatures. Recent studies showed that upon heat treatment in stress-induced martensite under compressive loads transformation temperatures can be increased significantly, qualifying Co-Ni-Ga for HT-actuation. The increase in transformation temperatures is related to a change in chemical order recently validated via neutron diffraction experiments. Since SMAs show distinct tension-compression asymmetry in terms of theoretical transformation strains and bearable stresses, understanding the impact of martensite aging in tension is crucial for future applications. The current results indicate that martensite aging in tension provides for a further improvement in functional properties.

引用

页数：4

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