Elastic and superelastic properties of Co49Ni22Ga29 single crystal

被引：10
作者：
Chernenko, V. A. [2 ]
Besseghini, S.
Villa, E.
Gambardella, A.
Perez-Landazabal, J. I.
机构：
[1] Inst Magnetism, UA-03142 Kiev, Ukraine
[2] CNR, IENI, I-23900 Lecce, Italy
[3] Univ Publ Navarra, Dept Fis, Pamplona 31006, Spain
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 20期
关键词：
D O I：
10.1063/1.2740112
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Low-frequency-elastic modulus, internal friction, tensile stress-strain loops, and thermally induced strain recovery are studied in the vicinity of the martensitic transformation (MT) exhibited by the [001]-oriented Co49Ni22Ga29 single crystal in as-grown state. The mechanical and thermomechanical tests are conducted with TA Instruments Q800 dynamic mechanical analyzer. Elastic modulus shows softening during cooling and a deep minimum at MT concurrently with the abrupt increase of internal friction. The stepwise and jerky yield and recovery of the superelastic 7% strain alongside the appearance of the jumplike character of thermally induced MT are obtained after thermomechanical training. Thermodynamic estimations reveal a self-consistency of the results. (C) 2007 American Institute of Physics.
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页数：3
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