文献类型：期刊文献

英文题名：Damage evolution mechanism of notch high-cycle fatigue in Ti-55531 alloy with multilevel lamellar microstructure

作者：Zhang, Zhong Huang, Chao-wen Tan, Chang-sheng Yang, Jiang Wan, Ming-pan Liu, Fei Xiang, Song

第一作者：Zhang, Zhong

通信作者：Huang, CW[1];Xiang, S[1]

机构：[1]Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China;[2]Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[4]Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639789, Singapore

第一机构：Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China.

年份：2026

卷号：36

期号：2

起止页码：470-487

外文期刊名：TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001722697900001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 52061005, 52261025) , the Science and Technology Programs of Guizhou Province, China (Nos. YQK [2023] 009, CXTD [2023] 009) , and the Technology Innovation Leading Program of Shaanxi Province, China (No. 2024ZCYYDP92) . The authors would like to thank Prof. Yi-long LIANG from Guizhou University. We also thank Dr. Xue-hao ZHENG from ZKKF (Beijing) Science & Technology Company for supporting of TEM analysis.

语种：英文

外文关键词：damage mechanism; Ti alloy; interrupted fatigue; crack initiation; stacking fault; twin; prismatic slip system

摘要：The interrupted fatigue test method was utilized to investigate the damage evolution mechanism of the notch high-cycle fatigue (NHCF) in Ti-55531 alloy with a multilevel lamellar microstructure. The results reveal that significant microvoids and microcracks predominantly initiate at alpha/beta interfaces under various notch root radii (R). Notably, even under larger R (0.75 mm), mutual interactions of stacking faults (SFs)-deformation twins, twins-twins, and SFs-SFs are observed. Furthermore, with decreasing R (0.34 and 0.14 mm), the volume fraction of SFs escalates significantly and twins are almost absent. Moreover, activated prismatic slip system decreases with a decrease in Schmidt factor and with the further decrease in R. Finally, strain localization near alpha/beta interfaces contributes to the initiation of fatigue microcracks.