On the widths of the hysteresis of mechanically and thermally induced martensitic transformations in Ni–Ti-based shape memory alloys
On the widths of the hysteresis of mechanically and thermally induced martensitic transformations in Ni–Ti-based shape memory alloys
复制标题
DOI：
10.3139/146.111284
复制
发表时间：
2015-10
影响因子：
0.8
通讯作者：
S. Jaeger;B. Maass;J. Frenzel;Marvin Schmidt;J. Ullrich;S. Seelecke;A. Schütze;O. Kastner;G. Eggeler
中科院分区：
文献类型：
--
作者：
S. Jaeger;B. Maass;J. Frenzel;Marvin Schmidt;J. Ullrich;S. Seelecke;A. Schütze;O. Kastner;G. Eggeler
众所周知，在Ni-Ti基形状记忆合金中，奥氏体相和马氏体相的良好相容导致了较窄的热滞回(如Ball和James，Arch)。定量配给。机甲。肛门，1987)。目前的工作表明，良好的结晶学拟合还与较小的机械滞后宽度有关，这是在正向和反向应力诱导相变过程中观察到的。此外，具有良好结晶学拟合度的形状记忆合金具有较小的相变应变。研究结果表明，这些关联式是通用的，适用于二元Ni-Ti(不同Ni含量)和四元Ni-Ti-Cu-X(X=Cr，Fe，V)合金。对于Ni-Ti二元合金，观察到富Ni组分(良好的晶格适配性)在伪弹性循环过程中表现出较低的不可逆应变累积。
Abstract It is well known that a good crystallographic compatibility between austenite and martensite in Ni–Ti-based shape memory alloys results in narrow thermal hystereses (e.g. Ball and James, Arch. Ration. Mech. Anal., 1987). The present work suggests that a good crystallographic fit is moreover associated with a small mechanical hysteresis width, observed during a forward and reverse stress-induced transformation. Furthermore, shape memory alloys with a good crystallographic fit show smaller transformation strains. The results obtained in the present study suggest that these correlations are generic and apply to binary Ni–Ti (with varying Ni contents) and quaternary Ni–Ti–Cu–X (X = Cr, Fe, V) alloys. For binary Ni–Ti, it was observed that Ni-rich compositions (good lattice fit) show a lower accummulation of irreversible strains during pseudoelastic cycling.