Effect of strain path on structure and mechanical behavior of ultrafine grain Cu-Cr alloy produced by equal-channel angular pressing
Effect of strain path on structure and mechanical behavior of ultrafine grain Cu-Cr alloy produced by equal-channel angular pressing
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DOI：
10.1016/j.actamat.2005.01.046
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发表时间：
2005-05-01
期刊：
影响因子：
9.4
通讯作者：
Kopylov, VI
中科院分区：
文献类型：
--
作者：
Vinogradov, A;Ishida, T;Kopylov, VI
从晶粒形状、尺寸、择优取向和晶界分布等方面研究了等径角挤压剧烈塑性变形过程中应变路径对Cu-Cr合金晶粒细化和组织特征的影响。在单调和循环试验中评估不同处理试样的力学行为，旨在澄清不同结构因素在所得力学性能中所起的作用。它示出，尽管相当大的微观结构的差异，在晶粒形态和纹理，拉伸和疲劳强度仅轻微影响本研究中选择的处理路线。然而，应变路径，因此，晶粒形状和纹理的延性和应变局部化，这是特别明显的循环加载过程中有一些影响。(c)2005 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The effect of strain path during severe plastic deformation via equal-channel angular pressing on grain refinement and structural features of a model Cu-Cr alloy is investigated in terms of grain shape, dimensions, preferred crystallographic orientation and distribution of grain boundaries with respect to the angle of misorientation. The mechanical behavior of differently processed specimens is assessed in both monotonic and cyclic tests aimed at clarification of the role played by different structural factors in the resultant mechanical properties. It is shown, that despite the considerable microstructural differences in the grain morphology and texture, the tensile and fatigue strength is only slightly affected by the processing routes chosen in the present study. However, the strain path and, therefore, the grain shape and texture have some effect on ductility and strain localization, which is particularly pronounced during cyclic loading. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.