Effect of intense plastic straining on microstructure and mechanical properties of an Al-Mg-Sc alloy

被引：3
作者：
Kaibyshev, R. [1 ]
Avtokratova, E. [2 ]
Sitdikov, O. [2 ]
机构：
[1] Belgorod State Univ, Pobeda 85, Belgorod 308015, Russia
[2] Inst Met Superplastic Problems, Ufa R-450001, Russia
来源：
15TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS (ICSMA-15) | 2010年 / 240卷
关键词：
RATE SUPERPLASTICITY; FATIGUE; DEFORMATION;
D O I：
10.1088/1742-6596/240/1/012120
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An Al-5% Mg-0.18% Mn-0.2% Sc-0.08% Zr-0.002% Be was subjected to equal-channel angular extrusion up to true strains of similar to 3 and similar to 8, that resulted in the formation of partially recrystallized and fully recrystallized structure, respectively. It was shown that the alloy with partially recrystallized structure exhibits highest strength and ductility. The material with fully recrystallized structure showed lowest fatigue crack growth rate and highest value of fracture toughness. Reasons of this unusual effect of microstructure on crack propagation resistance under fatigue are discussed.
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页数：4
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