摘要
在Gleeble 1500热模拟试验机上进行等温热模拟压缩试验,研究了0Cr11Ni2MoVNb钢在变形温度950℃～1100℃应变速率0.01～10s-1之间的热压缩变形行为。通常使用的本构模型,大多采用Z参数来表示温度和应变速率对材料变形行为的影响,而研究发现本构方程中材料常数是随着应变有规律性的变化,通过加入应变补偿,用与应变有关的多项式表示材料常数,这种方法建立的本构方程能够更精确的预测出材料在不同变形温度和应变速率下的应力值。
The compressive deformation behavior of 0Cr11Ni2MoVNb steel has been investigated during the temperatures from 950℃ to 1100℃ and strain rates from 0.01 to 10s-1 on Gleeble-1500 thermo-simulation machine. The effects of temperature and strain rate on deformation behaviors have been represented by Zener-Holloman parameter in an exponent type equation,but in fact material constants change regularly with strains.The influence of strain has been incorporated in the constitutive analysis by considering the effect of strain on material constants.The constitutive equation（considering the compensation of strain）could precisely predict the flow stress in different temperatures and strain rates.
出处
《锻压装备与制造技术》
2011年第1期91-94,共4页
China Metalforming Equipment & Manufacturing Technology
