SUPERPLASTIC DEFORMATION OF AN X7093 Al ALLOY

被引：0

作者：

Tadic, Srdjan ^{[1
]}

Sedmak, Aleksandar ^{[2
]}

Prokic-Cvetkovic, Radica ^{[2
]}

Eramah, Abdsalam M. ^{[1
]}

Rudolf, Rebeka ^{[3
]}

机构：

[1] Fac Mech Engn, Innovat Ctr, Belgrade 11000, Serbia

[2] Univ Belgrade, Fac Mech Engn, Belgrade 11000, Serbia

[3] Univ Maribor, Fac Mech Engn, SLO-2000 Maribor, Slovenia

来源：

MATERIALI IN TEHNOLOGIJE | 2014年 / 48卷 / 03期

关键词：

superplasticity; 7xxx Al alloys; deformation mechanisms; RATE-CONTROLLING MECHANISM; INTER-CRYSTALLINE; BEHAVIOR; CREEP; FLOW; ALUMINUM;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the superplastic deformation mechanism of a powder-metallurgy, high-zinc X7093 Al alloy. The objective was to examine the rate-controlling mechanisms that govern its superplastic deformation. The investigations were carried out in the temperature range 490-524 degrees C and strain rates of 4.17 x 10(-5) s(-1) to 2.1 x 10(-2) s(-1). The maximum ductility was slightly more than 500% at 524 degrees C and 4.2 x 10 s(-1). The values of the stress exponent (n) and the activation energy (Q) indicated that the deformation is rate-controlled by the climb within the grain-boundary diffusion path. The existence of a temperature-dependent threshold stress was confirmed.

引用

页码：321 / 325

页数：5

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