Effect of atomic order on the martensitic transformation of Ni-Fe-Ga alloys

被引：75
作者：
Santamarta, R
Cesari, E
Font, J
Muntasell, J
Pons, J
Dutkiewicz, J
机构：
[1] Univ Illes Balears, Dept Fis, E-07122 Palma de Mallorca, Spain
[2] Univ Politecn Catalunya, Dept Fis & Engn Nucl, E-08028 Barcelona, Spain
[3] Inst Met & Mat Sci, PL-30059 Krakow, Poland
来源：
SCRIPTA MATERIALIA | 2006年 / 54卷 / 12期
关键词：
shape memory alloys (SMA); Ni-Fe-Ga alloys; martensitic phase transformation; ordering;
D O I：
10.1016/j.scriptamat.2006.03.018
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of atomic order on martensitic transformation (MT) temperatures has been studied by differential scanning calorimetry in three polycrystalline alloys with compositions Ni53.5+x-Fe19.5-x-Ga-27.0 (x = 0, 0.5 and 1.5). Samples water quenched from different temperatures (470-1070 K) exhibit higher MT temperatures than ones slow cooled from the same temperature. This effect has been ascribed to a decrease of the L2(1) degree of order of the austenitic phase, which promotes an increase in the MT temperatures in these Ni-Fe-Ga alloys. The differences in ordering with cooling rate have been qualitative confirmed by electron diffraction patterns. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1985 / 1989
页数：5
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