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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Raising thermal stability of nanograins in a CuCrZr alloy by precipitates on grain boundaries
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Raising thermal stability of nanograins in a CuCrZr alloy by precipitates on grain boundaries

机译：沉淀物在晶界沉淀物中提高Cucrzr合金中纳米的热稳定性

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In this work, one group of solid solution CuCrZr alloy was pre-aged and followed by dynamic plastic de-formation to prepare nanograins with randomly distributed precipitates and the other group of solid solution CuCrZr alloy was subjected to dynamic plastic deformation and followed by aging treatment to prepare nanograins with precipitates on grain boundaries. We investigated the effect of precipitate distributions on the nanograin growth in the strain-induced nanostructured CuCrZr alloy. The results showed that the onset temperature of nanograin growth is similar to 523 K when precipitates are distributed randomly in the nanograins. Grain growth occurs at 723 K for the nanograins with precipitates located on grain boundaries. The precipitates located on grain boundaries much enhance Zener pinning effect than those distributed randomly in the nanograins, thus raising the thermal stability of nanograins. (C) 2021 Elsevier B.V. All rights reserved.
机译：在本研究中，一组固溶体CuCrZr合金经过预时效，然后进行动态塑性变形，以制备具有随机分布的析出物的纳米颗粒，另一组固溶体CuCrZr合金经过动态塑性变形，然后进行时效处理，以制备具有晶界析出物的纳米颗粒。我们研究了沉淀分布对应变诱导纳米结构CuCrZr合金中纳米晶粒生长的影响。结果表明，当沉淀在纳米颗粒中随机分布时，纳米颗粒生长的起始温度接近523K。对于晶界上有沉淀的纳米颗粒，晶粒生长发生在723K。晶界析出物比随机分布在纳米颗粒中的析出物更能增强齐纳钉扎效应，从而提高纳米颗粒的热稳定性。（c）2021爱思唯尔B.V.保留所有权利。

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