小冲杆试验技术测试国产800HT合金高温蠕变性能研究  

STUDY ON HIGH TEMPERATURE CREEP PROPERTIES OF DOMESTIC 800HT ALLOY USING SMALL PUNCH TEST TECHNIQUE

作　　者：江涛 关凯书[1] 钟继如 JIANG Tao;GUAN KaiShu;ZHONG JiRu(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《机械强度》2024年第4期999-1003,共5页Journal of Mechanical Strength

基　　金：国家磁约束核聚变能发展研究专项(2022YFE03120000);国家自然科学基金项目(52105146,52130511);核材料技术创新中心创新基金(ICNM⁃2022⁃ZH⁃02)资助。

摘　　要：通过小冲杆蠕变测试技术,研究了国产高温镍铬铁合金800HT的高温蠕变性能。分别采用欧洲标准CWA 15267推荐方法(CWA方法)以及全经验关联方法(EFS方法)和改进Chakrabarty方法(MCH方法)对小冲杆蠕变试验数据进行处理。并对比了单轴蠕变试验结果与小冲杆蠕变试验的结果。结果表明,采用CWA方法处理800HT合金的小冲杆蠕变数据要优于EFS和MCH转换方法。在拟合800HT合金单轴蠕变数据时,考虑了屈服状态蠕变激活能Q_(c)^(∗)的Wilshire函数与800HT蠕变数据关联效果较好。利用小冲杆蠕变试验技术,能够满足确定国产800HT合金的高温蠕变性能的要求。The creep performance of a domestic high⁃temperature incoloy 800HT alloy was tested using the small punch creep test technique.The CWA small punch creep test conversion method,and the EFS and MCH conversion methods were used respectively.The results of the uniaxial creep tests were compared with the small punch creep test results.The results show that,for small punch creep test data of 800HT alloy,the CWA method outperforms the EFS and MCH conversion methods.When fitting the uniaxial creep data,the Wilshire founction,which takes into account the creep activation energy in the yield state,correlates well with the 800HT creep data.With the small punch creep test technique,the requirements for determining the high temperature creep properties of the domestic 800HT alloy can be met.

关 键 词：800HT 镍铬铁合金 小冲杆蠕变试验 持久试验 Larson⁃miller 方法 Wilshire 方法 

分 类 号：TG144[一般工业技术—材料科学与工程]