Constitutive Equations of GH690-RE Alloy at Hot Deformation

Zhou Haitao1; Peng Qianzhi1; Yang Hongxing2; Liu Keming1; Liu Ruirui1; Zhou Xiao1; Zhong Fanghua1; Peng Yong1

doi:10.15980/j.tzzz.2012.07.026

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Constitutive Equations of GH690-RE Alloy at Hot Deformation
Vol. 32, Issue 7, Pages: 597-600(2012)
Published： 2012 ，
DOI： 10.15980/j.tzzz.2012.07.026

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[1]周海涛,彭谦之,杨红星,刘克明,刘瑞蕊,周啸,钟芳华,彭勇.GH690-RE合金高温塑性本构方程研究[J].特种铸造及有色合金,2012,32(07):597-600.

Zhou Haitao1, Peng Qianzhi1, Yang Hongxing2, et al. Constitutive Equations of GH690-RE Alloy at Hot Deformation. [J]. Special Casting & Nonferrous Alloys 32(7):597-600(2012)
[1]周海涛,彭谦之,杨红星,刘克明,刘瑞蕊,周啸,钟芳华,彭勇.GH690-RE合金高温塑性本构方程研究[J].特种铸造及有色合金,2012,32(07):597-600. DOI： 10.15980/j.tzzz.2012.07.026.

Zhou Haitao1, Peng Qianzhi1, Yang Hongxing2, et al. Constitutive Equations of GH690-RE Alloy at Hot Deformation. [J]. Special Casting & Nonferrous Alloys 32(7):597-600(2012) DOI： 10.15980/j.tzzz.2012.07.026.

摘要

采用Gleeble-3500热模拟机对GH690-RE合金进行高温压缩变形试验

在温度为950～1200℃

应变速率为0.001～2.000s-1的变形条件下测定并分析其应力-应变曲线。结果表明

流变应力随变形温度的升高和应变速率的降低而降低

且流变应力特征可用经典的双曲正弦模型描述。以应力-应变曲线为基础

采用线性回归法确定了GH690-RE合金的常数

建立了GH690-RE合金的高温本构关系方程。

Abstract

Hot compression deformation of GH690-RE alloy has been performed on the Gleeble-3500 hot simulator with strain rates of 0.001～2 s-1 at 950～1 200 ℃

and the flow stress-strain curves at different deformation conditions were analyzed.The results show that the flow stress is closely related to both deformation temperature and strain rate

and the flow stress is decreased with the increase of temperature and the decrease of strain rate.And the characteristics of flow stress can be described by the hyperbolic sine model.Material constants are determined by using the linear regression method based on the stress-strain curves

and the constitutive equation of GH690-RE alloy at hot deformation is presented.