文献类型：期刊文献

英文题名：A novel small specimen testing method based on a pneumatic bulging test: Measurement of tensile properties at high temperatures

作者：Shi, Jin[1,2];Guo, Zi-Jian[1];Wang, Jia-Xing[1];Liu, Xin[2];Zhou, Yun[3];Tang, Jian-Qun[4];Wen, Jian-Feng[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety MOE, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]China Special Equipment Inspect & Res Inst, Bldg 2, Beijing 100029, Peoples R China;[3]Special Equipment Safety Supervis Inspect Inst Jia, 107 Caochangmen St, Nanjing 210036, Peoples R China;[4]Nanjing Tech Univ, 30 South Puzhu Rd, Nanjing 211816, Peoples R China

年份：2024

卷号：209

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：20242016088215);WOS:【SCI-EXPANDED(收录号:WOS:001241586900001)】；

基金：The authors are grateful for the supports provided by the National Natural Science Foundation of China (52130511, 52122506, 51875203) and Shanghai Gaofeng Project for University Academic Program Development. The authors are also grateful to Yong-Hua Gu, Yi-Ning Wang, Gao-Feng Song, Yang Chen, You-Jun Ye et al., from Special Equipment Safety Supervision Inspection Institute of Jiangsu Province for test apparatus development and experiment assistance, grateful to Si-Yuan Zhao from Nanjing Tech University for lots of microscopic exam- inations, grateful to Han-Kui Wang, Liang Sun from China Special Equipment Inspection and Research Institute for analysis guidance in this paper.

语种：英文

外文关键词：Pneumatic bulging test; Tensile properties; High temperature; Miniature specimen; Small punch test

摘要：A novel testing method based on a pneumatic bulging test (PBT) was proposed to measure the tensile strength of round -disc -shaped miniature specimens at high temperatures. As an alternative to the small punch test (SPT) method, the concentrated force loaded by the punch was replaced with the uniformly distributed pressure loaded by high-pressure argon. A unique PBT apparatus was developed. Bulging test on specimens of SUS 304 stainless steel were carried out at 600 degrees C. The results show that the maximum deflection due to the bulge is located at the region of the pole of the deformed specimen, and it was also the place where the cracks initiated. Formulas are developed to forecast the instantaneous radius of curvature and thickness at the pole during the deformation process. Furthermore, the tensile strength and yield strength of the material at high temperatures were determined using the pressure -deflection curve at the pole and recommended equations. Verified with data from the uniaxial tensile experiment, the PBT method was proven to be a reliable testing technique for assessing tensile properties at high temperatures using miniature specimens. With a good physical similarity in failure mode, eccentricity -free loading, and reduced impact of contact friction from loading, the PBT technique has promising potential for future applications in the determination of high temperature strength of materials.