Microstructures and microhardness of an aluminum alloy and pure copper after processing by high-pressure torsion
Microstructures and microhardness of an aluminum alloy and pure copper after processing by high-pressure torsion
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DOI：
10.1016/j.msea.2005.08.133
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发表时间：
2005-11-25
期刊：
影响因子：
6.4
通讯作者：
Langdon, TG
中科院分区：
文献类型：
--
作者：
Horita, Z;Langdon, TG
实验在Al-3 wt.% Mg-0.2重量% Sc合金和纯铜，以评估高压扭转（HPT）的效果。结果表明，在两种材料中实现了非常显著的晶粒细化，其应变晶粒尺寸分别为类似于150 nm和类似于140 nm。显微硬度测量结果表明，在这两种材料的溶液处理条件下，圆盘边缘附近的硬度分别增加了约3倍和2倍。在Al-Mg-Sc合金上的实验表明，在HPT处理期间，通过反转扭转应变的方向，没有实现额外的硬化。此外，对纯铜的实验证实，当样品在473 K的温度下进行15 s或3 min的短期退火时，不能保持高的硬度值。(c)2005 Elsevier B. V.保留所有权利。
Experiments were conducted on an Al-3 wt.% Mg-0.2 wt.% Sc alloy and pure Cu to evaluate the effect of high-pressure torsion (HPT). The results show that very substantial grain refinement is achieved in both materials with as-strained grain sizes of similar to 150 and similar to 140 nm, respectively. Microhardness measurements demonstrate increases in the hardness near the edges of the disks by factors of approximately three and two over the sol uti on-treated conditions for these two materials, respectively. It is shown in experiments on the Al-Mg-Sc alloy that no additional hardening is achieved by reversing the direction of the torsional straining during the HPT processing. In addition, experiments on pure Cu confirm that the high values of hardness are not retained when samples are subjected to short-term anneals for 15 s or 3 min at a temperature of 473 K. (c) 2005 Elsevier B.V. All rights reserved.