分析了含有β-Nb粒子的Ni-Ti-Nb基形状记忆合金的临界屈服应力，研究了合金化元素对其临界屈服应力的影响。结果表明，Ni-Ti-Nb基形状记忆合金的临界屈服应力可用Tresca屈服准则描述，其△σTrans-△T值应低于二元NiTi合金，这一理论分析与实验结果一致；V的微量加入能有效提高Ni-Ti-Nb记忆合金的临界屈服应力。
The critical yield stress of Ni-Ti-Nb-base shape memory alloy with β-Nb particles was analysed and the effect of Vanadium on the critical yield stress was studied. The results show that the critical yield stress of Ni-Ti-Nb-base shape memory alloy can be described by Tresca yield criterion and has lower △σTrans-△T compared with NiTi binary alloy , which agrees with the experimental results. Adding trace Vanadium to Ni-Ti-Nb alloy can raise the critical yield stress of it effectively.
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