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首页> 外文期刊>Philosophical magazine: structure and properties of condensed matter >Compositional dependence of serrated flow in nickel binary solid solutions during high-temperature microindentation
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Compositional dependence of serrated flow in nickel binary solid solutions during high-temperature microindentation

机译：高温显微压痕过程中镍二元固溶体中锯齿状流的成分依赖性

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摘要

At 450 °C, pure nickel and nickel binary solid solutions, containing Ru, Rh, W, Re, Ir and Pt, have a smooth load-depth curves. In contrast, the alloying addition of Nb, Mo, Pd and Ta results in the occurrence of serrations in their load-depth profiles. Analyses show the load increment of the quasi-elastic segments scales linearly with the load at their starting point. The slope of such linear relationships was normalized by the solute concentration and then plotted against the diffusion rate of transition metal solutes within the nickel lattice and along dislocation cores. Linear relationships were observed in both cases. Results suggest that the solute diffusion along dislocation cores coupled with the atomic size misfit are mainly responsible for such serrations.
机译：在450°C下，含有Ru，Rh，W，Re，Ir和Pt的纯镍和镍二元固溶体具有平滑的负荷深度曲线。相比之下，Nb，Mo，Pd和Ta的合金添加会导致在其载荷深度曲线中出现锯齿。分析表明，准弹性线段的载荷增量与载荷在其起点处成线性比例关系。这种线性关系的斜率通过溶质浓度进行归一化，然后针对过渡金属溶质在镍晶格内和沿位错核的扩散速率作图。在两种情况下均观察到线性关系。结果表明，沿着位错核的溶质扩散以及原子尺寸失配是造成这种锯齿的主要原因。

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