Transmission electron microscopy study of phase compatibility in low hysteresis shape memory alloys

被引：113

作者：

Delville, Remi ^{[1
]}

Kasinathan, Sakthivel ^{[2
]}

Zhang, Zhiyong ^{[2
]}

Van Humbeeck, Jan ^{[3
]}

James, Richard D. ^{[2
]}

Schryvers, Dominique ^{[1
]}

机构：

[1] Univ Antwerp, Electron Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium

[2] Univ Minnesota, Dept Aerosp Engn & Mech, Minneapolis, MN 55455 USA

[3] Catholic Univ Louvain, Dept MTM, B-3001 Heverlee, Belgium

来源：

PHILOSOPHICAL MAGAZINE | 2010年 / 90卷 / 1-4期

关键词：

electron microscopy; martensitic transformation; interfaces; hysteresis; MARTENSITIC-TRANSFORMATION; MICROSTRUCTURE; DEPENDENCE; AUSTENITE;

D O I：

10.1080/14786430903074755

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recent findings have linked low hysteresis in shape memory alloys with phase compatibility between austenite and martensite. To investigate the evolution of microstructure as phase compatibility increases and hysteresis is reduced, transmission electron microscopy was used to study the alloy system Ti50Ni50-xPdx, where the composition is systemically tuned to approach perfect compatibility. Changes in morphology, twinning density and twinning modes are reported, along with special microstructures occurring when compatibility is achieved. In addition, the interface between austenite and a single variant of martensite was studied by high-resolution and conventional electron microscopy. The low energy configuration of the interface detailed in this article suggests that it plays an important role in the lowering of hysteresis compared to classical habit plane interfaces.

引用

页码：177 / 195

页数：19

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