The effect of precipitates on the superelastic response of [100] oriented FeMnAlNi single crystals under compression

被引：103
作者：
Tseng, L. W. [1 ]
Ma, Ji [2 ]
Hornbuckle, B. C. [3 ]
Karaman, I. [1 ,2 ]
Thompson, G. B. [3 ]
Luo, Z. P. [4 ]
Chumlyakov, Y. I. [5 ]
机构：
[1] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA
[2] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
[3] Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487 USA
[4] Fayetteville State Univ, Dept Chem & Phys, Fayetteville, NC 28301 USA
[5] Tomsk State Univ, Siberian Phys Tech Inst, Tomsk 634050, Russia
来源：
ACTA MATERIALIA | 2015年 / 97卷
基金：
俄罗斯基础研究基金会; 美国国家科学基金会;
关键词：
Superelasticity; Fe-based shape memory alloys; B2; precipitates; Atom probe tomography; SHAPE-MEMORY ALLOY; MARTENSITIC TRANSFORMATIONS; BEHAVIOR; HYSTERESIS; TENSION; DEFORMATION; ORIENTATION; MECHANISMS; DEPENDENCE; ASYMMETRY;
D O I：
10.1016/j.actamat.2015.06.061
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
FeMnAlNi shape memory alloys were recently discovered to have a small temperature dependence of the superelastic critical stress in a large superelastic temperature window from -196 degrees C to 240 degrees C. In this work, we investigated the effect of B2 nanoprecipitates on the superelastic characteristics of [100] oriented Fe43.5Mn34Al15Ni7.5 single crystals under compression, and found that the size, volume fraction and composition of precipitates strongly influence the transformation temperature, superelastic strain, critical stress for stress-induced martensitic transformation and stress hysteresis of the single crystals. The single crystals aged at 200 degrees C for 3 h show 7.2% superelastic strain with the precipitate size of about 6-10 nm. Longer aging times or higher aging temperature reduces superelastic recovery due to the coarsening of the precipitates. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：234 / 244
页数：11
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