Comprehensive analysis of minimum grain size in pure aluminum using friction stir processing
Comprehensive analysis of minimum grain size in pure aluminum using friction stir processing
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DOI：
10.1016/j.matlet.2010.06.003
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发表时间：
2010-09
影响因子：
3
通讯作者：
T. Morishige;T. Hirata;M. Tsujikawa;K. Higashi
中科院分区：
文献类型：
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作者：
T. Morishige;T. Hirata;M. Tsujikawa;K. Higashi
一种搅拌摩擦加工（FSP）技术已被开发用于铝和镁合金，与高应变速率处理的目标。在这项研究中，我们处理的微观结构的铝样品，三个级别的纯度，操纵他们的晶粒尺寸，使他们更细，使用FSP。在所有纯度水平下，晶粒尺寸随着Zener-Hollomon参数的增加而减小。然而，当经受相同的加工条件时，与较低纯度（99%和99.99%）铝的晶粒尺寸相比，FSP处理的超高纯度（99.999%）铝的再结晶晶粒特别大。在高应变率的加工过程中，晶粒尺寸达到了一定的最小值，我们在此报告了每个纯度水平。
A friction stir processing (FSP) technique has been developed for use with aluminum and magnesium alloys, with the goal of high-strain-rate processing. In this study, we treat the microstructures of aluminum samples, of three levels of purity, manipulating their grain sizes, making them finer, using FSP. Grain sizes decreased with an increase in the Zener–Hollomon parameter, at all purity levels. However, the recrystallized grain of FSP-ed ultra-high-purity (99.999%) aluminum was particularly large, compared to the grain sizes of lower-purity (99% and 99.99%) aluminum, when subjected to the same processing conditions. The grain size reached a certain minimum value at high-strain-rates of processing, which we report for each purity level herein.