Alloy design of FeMnSiCrNi shape-memory alloys related to stacking-fault energy
Alloy design of FeMnSiCrNi shape-memory alloys related to stacking-fault energy
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DOI：
10.1007/s11661-000-0001-x
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发表时间：
2000-03-01
影响因子：
2.8
通讯作者：
Jiang, Q
中科院分区：
文献类型：
--
作者：
Li, JC;Zhao, M;Jiang, Q
采用扩展位错节点法计算了铁基形状记忆合金的层错能γ（sf）。结果表明，Ni、Mn使奥氏体组织的γ（sf）增大，Cr、Si使γ（sf）减小，并建立了Ni、Cr、Mn、Si合金元素与γ（sf）的关系式。此外，根据合金的γ（sf）值和舍夫勒图，进行了铁基形状记忆合金的合金设计。发现具有最低γ（sf）的合金具有最好的形状记忆效应（SME），马氏体转变温度（M-s）略低于环境温度。合金的相应成分位于舍弗勒图中γ相区和γ + γ相区与α + γ + γ三相点之间的相线附近的γ相区。
The stacking-fault energy (gamma(sf)) of iron-based shape-memory alloys was calculated by the extended dislocation-node method. The results show that Ni and Mn increase the gamma(sf) of the alloys with an austenite structure, while Cr and Si decrease it. An expression relating the alloying elements of Ni, Cr, Mn, and Si to the gamma(sf) of the alloys is established. Moreover, in terms of the gamma(sf) values of the alloys and the Schaeffler diagram, the alloy design of iron-based shape-memory alloys is carried out. It is found that the alloy having the lowest gamma(sf) has the best shape-memory effect (SME), with a martensite transition temperature (M-s) being a little lower than ambient temperature. The corresponding composition of the alloy is located in the gamma-phase zone near the phase line between the gamma and gamma + epsilon phase zone and the triple point of alpha + gamma + epsilon in the Schaeffler diagram.