Effect of grain size on superelasticity in Fe-Mn-Al-Ni shape memory alloy wire
Effect of grain size on superelasticity in Fe-Mn-Al-Ni shape memory alloy wire
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DOI：
10.1063/1.4820429
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发表时间：
2013-09
期刊：
影响因子：
6.1
通讯作者：
T. Omori;M. Okano;R. Kainuma
中科院分区：
文献类型：
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作者：
T. Omori;M. Okano;R. Kainuma
通过循环拉伸试验研究了晶粒尺寸对Fe-34 Mn-15 Al-7.5Ni合金丝材超弹性性能的影响。结果表明，诱发马氏体相变的临界应力和超弹性应变是相对晶粒尺寸d/D（d为平均晶粒直径，D为丝径）的函数，临界应力与（1-d/D）~ 2成正比。在相对晶粒尺寸大于d/D = 1的试样中获得约5%的大超弹性应变。
Effects of grain size on superelastic properties in Fe-34Mn-15Al-7.5Ni alloy wires with a ⟨110⟩ fiber-texture were investigated by cyclic tensile tests. It was confirmed that the critical stress for induced martensitic transformation and the superelastic strain are functions of relative grain size d/D (d: mean grain diameter, D: wire diameter), and that the critical stress is proportional to (1–d/D)2 as well as in Cu-based shape memory alloys. A large superelastic strain of about 5% was obtained in the specimen with a large relative grain size over d/D = 1.