文献类型：期刊文献

英文题名：A new probabilistic control volume scheme to interpret specimen size effect on fatigue life of additively manufactured titanium alloys

作者：Tao, Zhi-Qiang[1,2,3];Wang, Zibiao[1];Pan, Xiangnan[1];Su, Tianxiong[1,4];Long, Xu[4];Liu, Bowen[5];Tang, Qingxiao[5];Ren, Xuechong[5];Sun, Chengqi[1];Qian, Guian[1];Hong, Youshi[1]

第一作者：Tao, Zhi-Qiang

通讯作者：Hong, YS[1]

机构：[1]Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China;[2]Beijing Union Univ, Coll Robot, Beijing 100020, Peoples R China;[3]Aircraft Strength Res Inst China, Natl Key Lab Strength & Struct Integr, Xian 710065, Shanxi, Peoples R China;[4]Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Shanxi, Peoples R China;[5]Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China

第一机构：Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China

通讯机构：[1]corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.

年份：2024

卷号：183

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20241215787954);WOS:【SCI-EXPANDED(收录号:WOS:001221864200001)】；

基金：The present research is supported by the National Natural Science Foundation of China (Nos. 11932020 and 12002186) , the Academic Research Projects of Beijing Union University (No. ZK80202101) , R & D Program of Beijing Municipal Education Commission (KM202211417012) , and the Open Foundation of National Key Laboratory of Strength and Structural Integrity (ASSIKFJJ202305002) .

语种：英文

外文关键词：Size effect; Fatigue life; Control volume; Probabilistic analysis; Titanium alloy

摘要：The effect of specimen size on the fatigue performance of additively manufactured (AMed) Ti-6Al-4V is investigated in this paper. The fatigue tests of Ti-6Al-4V specimens made by laser powder bed fusion were conducted via ultrasonic axial cycling up to very -high -cycle regime with stress ratio R = - 1. The S - N data of five group specimens show an evident size effect, that is, with the increase of specimen size, the fatigue life or fatigue strength decreasing gradually. A new probabilistic control volume scheme is developed to evaluate the fatigue life of large sized specimens by the tested data of small sized specimens. The applicability of the proposed model is validated by the present data and those of our previous investigation. Moreover, a general form of probabilistic control volume model is derived to show the original and present models are the special cases for conventional cast and AMed alloys.