文献类型：期刊文献

英文题名：Correlation Factor Study of Small Punch Creep Test and Its Life Prediction

作者：Wen, Cheng[1];Xu, Tong[2];Guan, Kaishu[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong St, Shanghai 200030, Peoples R China;[2]China Special Equipment Inspect & Res Inst, Bldg 2, Beijing 100029, Peoples R China

年份：2016

卷号：9

期号：10

外文期刊名：MATERIALS

收录：;EI(收录号：20164703032882);WOS:【SCI-EXPANDED(收录号:WOS:000384670800003)】；

基金：The authors of this paper would like to express their Acknowledgement to the State Bureau of Quality and Technical Supervision of China (201510070) for the funding. The authors of this paper would also like to express their Acknowledgement to Karel Matocha from Ostrava University of Technology (Czech Republic) for his help in the experiment.

语种：英文

外文关键词：small punch creep test; uniaxial creep test; correlation factor; life prediction

摘要：A small punch test is one of the innovative methods that can be used to evaluate the properties of a material without destructive harm to the in-service component. Conventionally identifying material properties by a uniaxial test is widely applied to engineering. How the properties obtained from a small punch test can be applied with the same utility has been a goal. In 2006, European Code of Practice (CoP) of small punch tests was first released, in which the correlation factor, ksp, was introduced to bridge the gap between the above methods. The author investigates the relationship between a uniaxial creep text and a small punch creep test by exploring the correlation factor k(sp). Various sets of experiments and a comparative study of the conventional uniaxial creep test and small punch creep test were carried out. Methods including Norton, Larson-Miller and Time versus Stress relation were employed to identify the value of k(sp). Different k(sp) values were found in different materials, which indicate that k(sp) values of materials need to be identified separately. In addition, the life prediction of a small punch creep test was carried out and the results of the life prediction predict a reasonable accuracy, which indicates that the small punch creep test is a reliable method for life prediction.