文献类型：期刊文献

英文题名：Microstructural evolution and hardening mechanisms in A286 superalloy thin-walled tubes subjected to cold forging

作者：Tao, Liang Feng, Zhiguo Jiang, Yulian Mo, Ningning Lu, Rengang

第一作者：Tao, Liang;陶亮

通信作者：Feng, ZG[1]

机构：[1]Guizhou Univ, Sch Mech Engn, Guiyang, Peoples R China;[2]Guizhou Inst Technol, Sch Mech Engn, Guiyang, Peoples R China;[3]Guizhou Univ, Key Lab Special Equipment & Mfg Technol, Guiyang, Peoples R China

第一机构：Guizhou Univ, Sch Mech Engn, Guiyang, Peoples R China

通信机构：corresponding author), Guizhou Univ, Mech Engn Coll, JiaxiuSouth Rd, Guiyang, Guizhou, Peoples R China.

年份：2025

外文期刊名：PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE

收录：;EI(收录号：20250317709639);Scopus(收录号：2-s2.0-85215131167);WOS:【SCI-EXPANDED(收录号:WOS:001396741900001)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was funded by the National Natural Science Foundation of China (GrantNo.52165042), Guizhou Provincial Science and Technology Projects (Grant No.20201Z049, Grant No.20201Y236), Guizhou Provincial Science and Technology Supporting Program (Grant No.2023G308), Excellent Young Talents Project of Guizhou Province (Grant No.20215617), Guiyang Municipal Project for Fostering Science and Technology Talents(Grant No.202143-1). Guizhou University Talent Introduction Research Fund (Grant No.202209).

语种：英文

外文关键词：Hardening mechanisms; cold forging; microstructural evolution; A286 superalloy; thin-walled tube

摘要：This paper aims to elucidate the microstructural evolution and hardening mechanisms in the thin-walled tube of A286 rivet sleeves subjected to cold forging. The strain distribution, microstructure, and hardness changes within the thin-walled tube were analyzed using Optical Metallography, Electron Backscatter Diffraction, a microhardness tester, and numerical simulations. The results indicate that cold forging leads to a 54% increase in the tube's maximum hardness compared to the initial billet. Notable hardness gradients are observed along both the axial (329-356 HV) and radial (343-370 HV) directions. This hardness enhancement primarily originates from grain boundary strengthening and dislocation strengthening. The non-uniform strain distribution in the tube causes varying degrees of hardening effect, contributing to the observed hardness gradient. Additionally, Cold forging promotes the development of {111} fiber textures oriented parallel to the normal direction within the tube. These findings provide valuable insights for optimizing cold forging process parameters and enhancing the quality of aerospace blind rivets.