Microtexture investigation of the relationship between strain and anomalous grain growth
Microtexture investigation of the relationship between strain and anomalous grain growth
复制标题
应变与反常晶粒生长关系的微观结构研究
DOI：
10.1080/01418619308225356
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发表时间：
1993
影响因子：
1.6
通讯作者：
V. Randlè
中科院分区：
文献类型：
--
作者：
V. Randlè
本文研究了纯镍中应变诱导的反常晶粒长大。结果发现，缓慢加热到1000[ddot]C的保温温度与1000[ddot]C的等温退火相比，大大增加了反常生长的比例。两个标本的取向差分布也有差异，尽管两者的主要特征是大多数边界是高流动性类型。应变诱导晶粒生长的机制进行了讨论，无论是在目前的数据和在更广泛的背景下。它建议，经常观察到的“晶粒生长潜伏期”实际上是一个晶界恢复阶段时，边界能够重新排列向具有较低的能量和/或较高的流动性的连接组。这反过来又增加了晶粒生长起始位点的选择性，从而增加了异常晶粒生长的程度。
Abstract Strain-induced anomalous grain growth has been investigated in pure nickel. It was found that slow heating to a holding temperature of 1000[ddot]C greatly increased the proportion of anomalous growth compared with isothermal annealing at 1000[ddot]C. There were also differences in the misorientation distributions of the two specimens, although the main feature of both was that the majority of boundaries were high-mobility types. Mechanisms for strain-induced grain growth are discussed, both in terms of the present data and in a wider context. It is suggested that the often observed ‘grain growth incubation period’ is in fact a grain-boundary recovery stage when boundaries are able to rearrange towards connected groups having a lower energy and/or higher mobility. This in turn increases the selectivity of sites for the initiation of grain growth and hence the degree of anomalous grain growth.