文献类型：期刊文献

英文题名：On specimen design for high cycle fatigue testing of welded joint

作者：Li, Shi-Chen[1]; Zhang, Wei-Chang[1]; Zhu, Ming-Liang[1]; Xuan, Fu-Zhen[1]

机构：[1] Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2020

卷号：136

外文期刊名：International Journal of Fatigue

收录：EI(收录号：20201108305365)

语种：英文

外文关键词：Molybdenum steel - Vanadium alloys - Welding - High-cycle fatigue - Welded steel structures - Chromium alloys - Low-cycle fatigue - Fatigue testing - Molybdenum alloys - Chromium steel - Deformation

摘要：Axially push-pull fatigue tests of a low-strength Cr-Ni-Mo-V steel welded joint using cross-weld specimens with two types of sampling, i.e., weld metal centered and heat-affected zone centered, were conducted up to 5 × 107 cycles at room temperature and 300 °C. Fatigue strength of heat-affected zone centered specimen was higher due to dynamic strain aging at weld metal at 300 °C and a locally mismatched deformation around heat-affected zone. The failure location varied as a result of mismatched deformation, structural soft zone, and micro-defects. The sampling dependence implied for a proper fatigue design and assessment of welded structures. ? 2020 Elsevier Ltd