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。
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.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2012年第7期597-600,共4页
Special Casting & Nonferrous Alloys
基金
江苏省科技计划资助项目(SBE201000527)
江西省自然科学基金资助项目(20114BAB206016)
