Fatigue of a fine-grained high-strength Al-6Mg-Sc alloy produced by equal-channel angular pressing

被引：16
作者：
Avtokratova, E. V. [1 ]
Kaibyshev, R. O. [1 ]
Sitdikov, O. Sh. [1 ,2 ]
机构：
[1] Russian Acad Sci, Inst Problems Met Superplast, Ufa 450001, Russia
[2] Nagoya Inst Technol, Showa Ku, Nagoya, Aichi 4668555, Japan
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2008年 / 105卷 / 05期
关键词：
D O I：
10.1134/S0031918X08050116
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Room-temperature mechanical properties of a fine-grained high-strength Al-6Mg-Sc alloy 1570 produced by equal-channel angular pressing (ECAP) have been studied. The alloy was deformed to a true degree of deformation epsilon similar to 8 at a temperature of 325C. The average size and the volume fraction of new small grains after ECAP were 1.2 mu m and 0.7, respectively. It is shown that the formation of a submicrocrystalline structure makes it possible to increase the yield strength and endurance limit of the alloy 1570 with respect to the microcrystalline and coarse-grained states with small loss in plasticity. The influence of the microstructure which is formed in the process of ECAP on the behavior of the material upon high-cycle fatigue is discussed.
引用
收藏
页码：500 / 508
页数：9
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