TB8钛合金超塑性拉伸变形流变行为与本构方程

王明主; 董洪波; 邹忠波; 王鑫

doi:10.15980/j.tzzz.2016.01.028

轻有色合金 | 浏览量 : 0 下载量: 249 CSCD: 4

导出
分享
收藏
专辑

TB8钛合金超塑性拉伸变形流变行为与本构方程
Superplastic Tensile Deformation Behavior and Constitutive Equation of TB8 Titanium Alloy
2016年36卷第1期页码：103-106
纸质出版日期： 2016 ，
DOI： 10.15980/j.tzzz.2016.01.028

扫描看全文

[1]王明主,董洪波,邹忠波,王鑫.TB8钛合金超塑性拉伸变形流变行为与本构方程[J].特种铸造及有色合金,2016,36(01):103-106.

Wang Mingzhu, Dong Hongbo, Zou Zhongbo, et al. Superplastic Tensile Deformation Behavior and Constitutive Equation of TB8 Titanium Alloy[J]. Special Casting & Nonferrous Alloys, 2016,36(1):103-106.
[1]王明主,董洪波,邹忠波,王鑫.TB8钛合金超塑性拉伸变形流变行为与本构方程[J].特种铸造及有色合金,2016,36(01):103-106. DOI： 10.15980/j.tzzz.2016.01.028.

Wang Mingzhu, Dong Hongbo, Zou Zhongbo, et al. Superplastic Tensile Deformation Behavior and Constitutive Equation of TB8 Titanium Alloy[J]. Special Casting & Nonferrous Alloys, 2016,36(1):103-106. DOI： 10.15980/j.tzzz.2016.01.028.

摘要

在电子万能拉伸试验机上对TB8钛合金进行了恒应变速率超塑性拉伸试验(变形温度为720

80℃

应变速率为0.000 1

.01s

-1

)

研究了拉伸流变行为

计算了超塑性拉伸变形激活能和相应的应力指数

建立了TB8钛合金应力-应变本构模型。结果表明

在同一应变速率下

流变应力随变形温度的增加而减少

同一变形温度下

流变应力随应变速率的增加而增加。在变形温度为840℃

应变速率为10

-4

-1

合金的伸长率最大

为356%;超塑性拉伸变形激活能和应力指数分别为251.25kJ/mol、2.389 5。

Abstract

Superplastic tensile test of TB8 alloy was carried out with constant strain rate in the electronic universal tensile testing machine at 760

80 ℃ and strain rate of 0.000 1

.01s

-1

.Flow stress behavior was analyzed

and the superplastic tensile deformation activation energy and corresponding stress exponent were calculated.Stress-strain constitutive model of the TB8 titanium alloy was established.The results show that the flow stress is decreased with the increase of deformation temperature at a constant strain rate

while it is increased with the increase of strain rate at a constant deformation temperature.The maximum elongation of 356% can be obtained with the deformation at 840 ℃ and the strain rate at 10

-4

-1

.The superplastic deformation activation energy and the corresponding stress exponent are 251.25kJ/mol and 2.389 5

respectively.