On the effect of gamma phase formation on the pseudoelastic performance of polycrystalline Fe–Mn–Al–Ni shape memory alloys
On the effect of gamma phase formation on the pseudoelastic performance of polycrystalline Fe–Mn–Al–Ni shape memory alloys
复制标题
DOI：
10.1016/j.scriptamat.2015.06.013
复制
发表时间：
2015-11
影响因子：
6
通讯作者：
M. Vollmer;C. Segel;P. Krooss;J. Günther;L. Tseng;I. Karaman;A. Weidner;H. Biermann;T. Niendorf
中科院分区：
文献类型：
--
作者：
M. Vollmer;C. Segel;P. Krooss;J. Günther;L. Tseng;I. Karaman;A. Weidner;H. Biermann;T. Niendorf
近年来，铁基形状记忆合金如Fe-Mn-Al-Ni由于其上级伪弹性性能和低成本的合金元素而受到关注。多晶Fe-Mn-Al-Ni中韧性γ相的形成及其对伪弹性性能的影响尚未得到解决。通过改变淬火条件，研究表明，在晶界上控制γ相的析出可以抑制沿晶开裂，而不影响伪弹性，原位增量应变试验表明，在8%的应变范围内具有良好的回复性。
In recent years, iron-based shape-memory-alloys such as Fe–Mn–Al–Ni came into focus, due to superior pseudoelastic performance and concomitantly low costs of the alloying elements. The formation of the ductile γ-phase in polycrystalline Fe–Mn–Al–Ni and its impact on the pseudoelastic performance have not been addressed, yet. Based on modification of quenching conditions this study shows that controlled γ-phase precipitation at grain boundaries can suppress intergranular cracking without affecting pseudoelasticity.In situincremental strain tests revealed good recoverability up to about 8% strain.