Analytical modeling of hot behavior of Ti-6Al-4V alloy at large strain

被引：14

作者：

Jacques Tchein, Gnofam ^{[1
,2
]}

Jacquin, Dimitri ^{[1
]}

Aldanondo, Egoitz ^{[3
]}

Coupard, Dominique ^{[4
]}

Gutierrez-Orrantia, Esther ^{[2
]}

Girot Mata, Franck ^{[2
]}

Lacoste, Eric ^{[1
]}

机构：

[1] Univ Bordeaux, I2M, CNRS, UMR 5295, F-33400 Talence, France

[2] Univ Basque Country, UPV EHU, Fac Engn, Dept Mech Engn, Alameda Urquijo S-N, Bilbao, Bizkaia, Spain

[3] Lortek, Arranomendia Kalea 4A, Ordizia 20240, Gipuzkoa, Spain

[4] Arts & Metiers ParisTech, I2M, CNRS, UMR 5295,Esplanade Arts & Metiers, F-33400 Talence, France

来源：

MATERIALS & DESIGN | 2019年 / 161卷

关键词：

Large strain; Hot behavior; Ti-6Al-4V alloy; Flow stress; Analytical behavior law; Torsion test; TITANIUM-ALLOY; FLOW BEHAVIOR; DEFORMATION CHARACTERISTICS; DYNAMIC RECRYSTALLIZATION; BETA MICROSTRUCTURE; CONSTITUTIVE MODEL; WORKING; SIMULATION; EVOLUTION; STRESS;

D O I：

10.1016/j.matdes.2018.11.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hot deformation behavior of the Ti-6Al-4V alloy is studied through hot torsion tests. Cylindrical samples are twisted at different strain rates and temperatures in the beta phase domain. The recorded torque vs twisting angle data are converted to strain vs stress data using the appropriate methods. All the flow curves obtained are characteristic of continuous dynamic recrystallization. The flowstresses exhibit rapid growth to reach a single maximum followed by a decrease and a steady-state regime. The influence of strain rate and temperature is taken into account. An analytical model is proposed, which gives accurate flow curves for the Ti-6Al-4V alloy for processing temperatures between 1000 degrees C and 1100 degrees C and strain rates between 0.01/s and 1/s. The model is validated by further experimental tests. (c) 2018 Elsevier Ltd.

引用

页码：114 / 123

页数：10

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