Superplastic behavior and deformation mechanisms of Al-Mg-based alloy processed by isothermal multidirectional forging

被引：0

作者：

Yakovtseva, Olga A. ^{[1
]}

Kishchik, Anna A. ^{[1
]}

Irzhak, Artemii, V ^{[1
]}

Mikhaylovskaya, Anastasia, V ^{[1
]}

Misis, Nust ^{[1
]}

机构：

[1] NUST MISiS, Moscow 119049, Russia

来源：

MATERIALS LETTERS | 2024年 / 377卷

关键词：

Aluminum alloys; Multidirectional forging; Microstructure; Grain boundary sliding; Diffusion;

D O I：

10.1016/j.matlet.2024.137538

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolutions of microstructure and superplastic deformation mechanisms for Al-Mg-based alloy with L12nanoprecipitates and recrystallized 1.8 mu m grains processed by multidirectional forging were studied. The alloy exhibiting excellent superplastic properties at 460 degrees C high strain rates of (1-6) x 10- 2s- 1. Due to a high fraction of high-angle grain boundaries and grain size stability, grain boundary sliding contributed -50 % to the total strain and it was accommodated by both dislocation slip/creep and diffusional creep mechanisms. The dislocation slip/creep contribution increased with increasing strain rate.

引用

页数：4

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