Effect of subgrain structure on the creep strength of alloy 1207

被引：3

作者：

Dudko, V. A. ^{[1
]}

Kaibyshev, R. O. ^{[1
]}

Salakhova, E. R. ^{[2
]}

机构：

[1] Belgorod State Univ, Belgorod 308015, Russia

[2] Ufa State Aviat Tech Univ, Ufa 450000, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2009年 / 107卷 / 01期

关键词：

MG-SC ALLOY; DEFORMATION-BEHAVIOR; THRESHOLD STRESS; AL;

D O I：

10.1134/S0031918X09010128

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of severe plastic deformation (SPD) on the creep resistance of the Al-6%Cu-0.48Mn-0.52Mg-0.3Sc-0.1Zr alloy has been examined in a temperature range of 125-180A degrees C. It has been shown that SPD performed by the method of equal-channel angular pressing at 300A degrees C to a true strain of similar to 1 leads to the formation of a well-defined subgrain structure, which is retained upon solution treatment before quenching because of the presence in the alloy of ultradisperse Al(3)(Sc, Zr) particles with coherent boundaries. It was established that the creep strength at 125-150A degrees C of the as-cast alloy and of the deformed material is approximately the same. At 180A degrees C, the creep rate of the deformed aluminum alloy is almost an order of magnitude lower than that of the as-cast alloy. The reasons for the influence of the subgrain structure on the creep strength of the Al-Cu-Sc-Zr alloy are discussed.

引用

页码：90 / 95

页数：6

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