Superplastic deformation behavior of ultra-fine-grained Ti-1V-4Al-3Mo alloy: constitutive modeling and processing map

被引：12

作者：

Mosleh, A. O. ^{[1
,2
]}

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

Kotov, A. D. ^{[1
]}

Sitkina, M. ^{[1
]}

Mestre-Rinn, P. ^{[3
]}

Kwame, J. S. ^{[4
]}

机构：

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

[2] Benha Univ, Shoubra Fac Engn, Shoubra St 108,PO 11629, Cairo, Egypt

[3] Ecole Natl Super Mines, 158 Cours Fauriel, F-42100 St Etienne, France

[4] Univ Strathclyde, Adv Forming Res Ctr, 85 Inchinnan Dr, Inchinnan PA4 9LJ, Renfrew, Scotland

来源：

MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 09期

基金：

俄罗斯科学基金会;

关键词：

constitutive modeling; titanium alloy; activation energy; superplasticity; processing maps; HOT DEFORMATION; MICROSTRUCTURAL EVOLUTION; FLOW BEHAVIOR; MECHANICAL-BEHAVIOR; TI-6AL-4V ALLOY; STRAIN-RATE; TITANIUM; TEMPERATURE; COMPRESSION; SIMULATION;

D O I：

10.1088/2053-1591/ab31f9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper studies the superplasticity of conventional sheets of Ti-1V-4Al-3Mo (alpha + beta) alloy. The flow behavior was investigated in a temperature range of 775 degrees C-900 degrees C and a constant strain rate range of 2 x 10(-4)-5 x 10(-3) s(-1) via uniaxial tensile tests. The microstructure evolution during the superplastic deformation was analyzed. The results revealed that, the flow behavior of Ti-1V-4Al-3Mo (alpha + beta) alloy is characterized by strain softening phenomena. The experimental stress-strain data were used to build a power law constitutive model. A processing map, which shows the safe and unsafe regions of deformation, was also constructed for the studied alloy. The optimal deformation regime was attained at a temperature of 875 degrees C and strain rate of 1 x 10(-3) s(-1) which provided a beta phase fraction of 52%. Equiaxed fine-grained alpha and beta structure with size of 2-3 mu m as well as dislocation activity inside the alpha-grains were identified in the optimum deformation regime.

引用

页数：9

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