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首页> 外文期刊>Materials Science and Engineering >Impurity effect on recrystallization and grain growth in severe plastically deformed copper
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Impurity effect on recrystallization and grain growth in severe plastically deformed copper

机译：严重塑性变形铜中重结晶和籽粒生长的杂质作用

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摘要

The impurity effect on commercial purity copper (4 N and 3 N) was investigated by comparing their annealing induced recrystallization and grain growth behavior after severe plastic deformation. Equal channel angular pressing (ECAP) with additional cryogenic rolling was applied to produce equiaxed ultra-fine grained (UFG) and nano-laminated (NL) coppers with high stored excess energy. The stored excess energy increased with decreasing purity from 4 N to 3 N, whereas the grain boundary velocity and recrystallized grain size decreased for both UFG and NL Cu. In particular, the NL structures were found to be more sensitive to impurities than equiaxed ultra-fine grained ones, and consequently the abnormal grain growth at the early stages of recrystallization in NL 4 N Cu was effectively suppressed in NL 3 N Cu. The analysis of the grain growth rate during recrystallization, using the microstructural path methodology (MPM), demonstrates that the correlation between the abnormal grain growth and the significantly enhanced grain boundary mobility cannot be solely explained by the high stored excess energy. Under all conditions, the impurity drag effect poses a kinetic constraint on the rate-controlling mechanism for grain boundary migration.
机译：通过比较重度塑性变形后的退火诱导的重结晶和晶粒生长行为来研究对商业纯度铜（4n和3n）的杂质影响。施加具有额外的低温轧制的等沟角压（ECAP），以产生具有高储存过量能量的等轴的超细晶粒（UFG）和纳米层压（NL）铜。储存的过量能量随着4 n至3 n的降低而增加，而UFG和NL Cu两种晶粒边界速度和再结晶晶粒尺寸降低。特别地，发现Nl结构对杂质更敏感而不是等轴的超细晶粒，因此在Nl 3 N Cu中有效地抑制了Nl 4 N Cu中重结晶早期阶段的异常谷物生长。使用微观结构路径方法（MPM）重结晶期间晶粒生长速率的分析表明，异常晶粒生长和显着增强的晶界移动性之间的相关性不能仅通过高储存的过量能量来解释。在所有条件下，杂质拖动效应对晶界迁移的速率控制机制造成动力学约束。

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  • 来源
    《Materials Science and Engineering》 |2021年第8期|141786.1-141786.11|共11页
  • 作者

    Yao Jiang; Rui Cong Gu; Martin Peterlechner; Yu Wei Liu; Jing Tao Wang; Gerhard Wilde;

  • 作者单位

    School of Materials Science and Engineering Nanjing University of Science and Technology Xiaolignwei Str. 200 210094 Nanjing PR China Institute of Materials Physics University of Muenster Wilheun-Klemm-Str. 10 48149 Muenster Germany Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Xiaolignwei Str. 200 210094 Nanjing PR China;

    School of Materials Science and Engineering Nanjing University of Science and Technology Xiaolignwei Str. 200 210094 Nanjing PR China;

    Institute of Materials Physics University of Muenster Wilheun-Klemm-Str. 10 48149 Muenster Germany;

    School of Materials Science and Engineering Nanjing University of Science and Technology Xiaolignwei Str. 200 210094 Nanjing PR China;

    School of Materials Science and Engineering Nanjing University of Science and Technology Xiaolignwei Str. 200 210094 Nanjing PR China Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Xiaolignwei Str. 200 210094 Nanjing PR China;

    Institute of Materials Physics University of Muenster Wilheun-Klemm-Str. 10 48149 Muenster Germany Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Xiaolignwei Str. 200 210094 Nanjing PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Impurity effect; Recrystallization; Abnormal grain growth; Severe plastic deformation; Nano-Iamellar; Copper;

    机译：杂质效应;重结晶;异常谷物生长;严重的塑性变形;Nano-iamellar;铜;

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