基于蠕变数据的应力松弛行为预测模型与方法  

PREDICTION MODELS AND METHODOLOGY OF STRESS RELAXATION PROPERTY FROM CREEP DATA

作　　者：郭进全[1] 田龙[1] 张勇[1] 王立新[1] 孟五洲[1] 

机构地区：[1]安阳工学院机械结构强度实验室,安阳455000

出　　处：《机械强度》2011年第5期685-689,共5页Journal of Mechanical Strength

基　　金：国家自然科学基金(51075003);河南省重点科技攻关计划项目(112102210125);河南省教育厅自然科学研究项目(2011C470006)资助~~

摘　　要：综合考虑三阶段蠕变速率的影响,克服现有蠕变方程不易求解的缺点,提出一种基于平均蠕变速率的线性蠕变—松弛转换模型;以幂律蠕变模型为基础,确立一套完整的基于蠕变数据的松弛性能预测方法。1Cr10NiMoW2VNbN为例的验证结果表明,该模型转换数据较好地与实际试验结果吻合,且远优于幂律蠕变模型,可推荐用于高温材料的松弛行为预测。A linear creep-relaxation conversion model based on average creep rate,which avoids the calculation limitation of existing creep formula,was developed by synthetically considering the effect of three rates of creep process and an integral prediction methodology of stress relaxation performance was established,linking to power creep functions.Validation results of alloy 1Cr10NiMoW2VNbN indicate that the developed conversion model leads to better consistent results with the experimental data which＇s accuracy is far more than power creep functions,and thus is recommended in the relaxation prediction of high temperature materials.

关 键 词：蠕变数据 蠕变—松弛转换模型 应力松弛性能 预测方法 平均蠕变速率模型 

分 类 号：TG111.8[金属学及工艺—物理冶金] O344.6[金属学及工艺—金属学]