文献类型：期刊文献

英文题名：Deformation and fracture mechanisms of Ti-55531 alloy with a bimodal microstructure under the pre- tension plus torsion composite loading

作者：Huang, Feiyu Huang, Chaowen Zeng, Hongtao Yang, Jiang Wang, Tao Wan, Mingpan Liu, Dan Ji, Shengli Zeng, Weidong

第一作者：Huang, Feiyu

通信作者：Huang, CW[1];Zeng, HT[2]

机构：[1]Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China;[2]Guizhou Anda Aviat Forging Co Ltd, Anshun 561000, Peoples R China;[3]Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China;[4]Hebei Univ Engn, Coll Mech & Equipment Engn, Handan 056038, Peoples R China;[5]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[6]Western Superconduct Technol Co Ltd, Xian 710018, Peoples R China

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;corresponding author), Hebei Univ Engn, Coll Mech & Equipment Engn, Handan 056038, Peoples R China.

年份：2023

卷号：26

起止页码：7425-7443

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20233814751514);Scopus(收录号：2-s2.0-85171423008);WOS:【SCI-EXPANDED(收录号:WOS:001150085700001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 52061005 and 52261025) , the Science and Technology Program of Guizhou Province (Nos. [2021] 310, YQK [2023] 009, and [2023] 278) . The authors would like to thank Dr. Xin Wen from Chongqing University, Dr. Changsheng Tan from Xi 'an University of Technology, and Dr. Chao Zhu from MogoEdit for their useful discussions and language help. We also thank Dr. Xuehao Zheng from ZKKF (Beijing) Science & Technology Company for supporting of TEM analysis.

语种：英文

外文关键词：Ti-55531 alloy; Pre-tension loading; Pre-tension plus torsion composite; loading; Deformation mechanism; Fracture mechanism

摘要：The deformation and fracture behavior of the Ti-55531 alloy with a bimodal microstructure (BM) under the pre-tension plus torsion composite loading were systematically investigated at room temperature. The results indicate that the pre-tension loading dramatically reduces the subsequent torsional strength of the alloy, while its torsional plasticity is almost not affected. A (1010) prismatic slip is initiated inside the primary equiaxed a (ap) phase during the pre-tension stage. Subsequently, several dislocation jogs form inside the ap particles due to the crossing of the (0002)[121 0] basal and (1101) [1 2 1 0] pyramidal slip systems during the torsion deformation stage, which may be a novel deformation mechanism of the Ti-55531 alloy. Moreover, the ap particles are cut by numerous parallel slip bands, resulting in ladder-like structures be formed at the ap/btrans (b transformed microstructure) interface, which can promote microcrack initiation at the ap/btrans interfaces. Furthermore, {1011}a deformation twins are only detected inside secondary a (as) phase just during the subsequent torsion deformation stage. In the main bearing phase, the ap particles elongate along specific directions in different deformation regions due to a change in the maximum shear stress. Thus, the cross-section profile from the surface to the center of the specimens after the pre-tension plus torsion deformation can be divided into three regions: torsion, tension plus torsion, and tension deformation regions. These findings can provide a theoretical basis for understanding the deformation damage of aerospace components under complex loads and optimizing their structural design.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).