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首页> 外文会议>European symposium on martensitic transformations >Influence of Omega-Phase Precipitation Hardening on the Static and Dynamic Properties of Metastable Beta Ti-Nb-Zr and Ti-Nb-Ta Alloys
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Influence of Omega-Phase Precipitation Hardening on the Static and Dynamic Properties of Metastable Beta Ti-Nb-Zr and Ti-Nb-Ta Alloys

机译：ω相沉淀硬化对亚稳βTi-Nb-Zr和Ti-Nb-Ta合金静态和动态性能的影响

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摘要

The influence of thermomechanical processing on the Ti-21.8Nb-6Zr (TNZ) and Ti-19.7Nb-5.8Ta (TNT) (at%) alloys' structure, phase composition, mechanical and functional properties is studied. Both alloys possess polygonized dislocation substructure (average subgrain size ~ 100 nm), and manifest superelastic behavior at room temperature and recovery stress generation during constant-strain temperature scanning experiments. After aging treatment, both alloys were co-phase precipitation hardened, but their mechanical behavior was impacted differently -- it was detrimental for TNZ and beneficial for TNT. The different impact of aging heat treatment on the mechanical behavior of these alloys is explained by the differences in the co-phase nucleation rate, precipitates' size, shape, volume fraction and distribution, and by their effect on the alloys' critical stresses and transformation temperatures.
机译：研究了热机械加工对Ti-21.8NB-6ZR（TNZ）和Ti-19.7NB-5.8TA（TNT）（TNT）（以％）合金结构，相组合物，机械和功能性质的影响。两种合金具有多边形的位错子结构（平均子粒尺寸〜100nm），并且在恒定应变温度扫描实验期间在室温和恢复应力产生时表现出超弹性行为。在衰老后处理后，两种合金都是相加的硬化，但它们的机械行为受到不同的影响 - 它对TNZ有害，有益于TNT。衰老热处理对这些合金的力学行为的不同影响是通过共相成核速率，沉淀的尺寸，形状，体积分数和分布的差异，以及它们对合金的临界应力和转化的影响温度。

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