Superplastic behaviour of Al-Mg-Zn-Zr-Sc-based alloys at high strain rates

被引：46

作者：

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

Yakovtseva, O. A. ^{[1
]}

Cheverikin, V. V. ^{[1
]}

Kotov, A. D. ^{[2
]}

Portnoy, V. K. ^{[1
]}

机构：

[1] Natl Univ Sci & Technol MISiS, Leninsky Prospekt 4, Moscow 119049, Russia

[2] Natl Res Univ Higher Sch Econ, Dept Mech & Math Simulat, B Trehsvyatitelskiy 3, Moscow 109028, Russia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 659卷

关键词：

Aluminium alloys; High strain rate superplasticity; Grain structure; Dislocation structure; Particle-stimulated nucleation; MICROALLOYING ADDITIONS; MECHANICAL-PROPERTIES; GRAIN-GROWTH; DEFORMATION; ALUMINUM; RECRYSTALLIZATION; MICROSTRUCTURE; FE; CU; STABILITY;

D O I：

10.1016/j.msea.2016.02.061

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Superplastic deformation behaviour of two aluminium-based AA7XXX type alloys with Sc and Zr additives distinguished by the presence and absence of coarse eutectic Al9FeNi particles are compared. An alloy with Al9FeNi particles exhibits high strain rate superplasticity at constant strain rate range of 5 x 10(-3)-8 x 10(-2) s(-1) with elongation of 915% due to extensive dynamic recrystallisation. Effective activation energy of superplastic deformation, surface relief of deformed samples, and grain structure evolution are analysed. Particle-depleted zones are found in the alloy with Al9FeNi particles at strains higher than 1.25. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：225 / 233

页数：9

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