GH5188合金流变行为研究  

Study on plastic deformation behavior of GH5188 superalloy

作　　者：东赟鹏[1] 王超渊 宋晓俊[1] 陈由红[1] 张敏聪[1] 王淑云[1] 

机构地区：[1]北京航空材料研究院焊接及锻压工艺研究室,北京100095

出　　处：《锻压技术》2013年第6期116-121,共6页Forging & Stamping Technology

摘　　要：通过在Gleeble3500型热模拟实验机上对GH5188合金进行等温热压缩实验，在变形温度为1030-1150℃、应变速率为0．01-10s-1的条件下，研究其热压缩变形的流变应力变化规律。在应力一应变结果的基础上，采用引入应变量因素的Arrhenius方程，建立了描述GH5188合金高温变形特性的本构方程。结果表明：变形温度和应变速率对GH5188合金流变应力影响显著，随变形温度升高和变形速率的降低，相同变形程度下合金的流变应力显著降低，并且在较低的应变下合金即可达到稳态流变状态。GH5188合金流变应力计算值和实验值相对误差较小，所建立的本构方程具有良好的预测能力。The flow stress behavior of GH5188 superalloy during hot compression deformation conditions was investiga- ted by isothermal hot compression on Gleeble-3500 hot simulation machine with the temperature range of 1030 -1150 ℃ and strain rate range of 0.01 - 10 s-1. The constitutive equation based on the result of stress-strain, for describing the plastic deformation behavior of GH5188 superalloy during hot compression process was established using, the Arrhe- nius equation with strain value. The results show that the flow stress of GH5188 superalloy is greatly affected by tem- perature and strain rate. With the temperature increases or the strain rate decreases, the flow stress of GH5188 super- alloy decreases greatly, and the plastic deformation gets in to the steady-going condition as soon as possible. The errors between calculated values and experimental values of GH5188 superalloy are nearly none. The constitutive equation has a good ability prediction.

关 键 词：GH5188高温合金 等温成形 流变应力 本构方程 

分 类 号：TG132.32[一般工业技术—材料科学与工程]