文献类型：期刊文献

英文题名：Optimization of quasi-β forging parameters to control trimodal microstructure parameters and performance of TC21 forgings

作者：Li, Xiang Huang, Chaowen Yang, Jiang Liu, Fei Wei, Siyuan Wan, Mingpan Zhao, Fei Zhao, Yongqing

第一作者：Li, Xiang

通信作者：Huang, CW[1]

机构：[1]Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[3]Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore City 639798, Singapore;[4]Agcy Sci Tech & Res ASTAR, Inst Mat Res & Engn IMRE, Singapore City 138634, Singapore;[5]Northwest Inst Nonferrous Met Res, Xian 710016, 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.

年份：2024

卷号：909

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20242516263590);Scopus(收录号：2-s2.0-85195873964);WOS:【SCI-EXPANDED(收录号:WOS:001257882000001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 52061005, 52261025, and 52301137) , the Science and Technology Program of Guizhou Province (Nos. YQK [2023] 009, [2021] 310, and [2023] 278) . 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：TC21 forgings; Quasi-beta forging; Forging parameters; Trimodal microstructure; Mechanical properties

摘要：This study aims to explore the influence of distinct forging parameters on microstructure and mechanical properties of TC21 forgings. The trimodal microstructure, which includes equiaxial alpha (alpha eq), lath alpha (alpha lath), and fine alpha (alpha fine) phases, was achieved via quasi-beta forging and dual heat treatment. Subsequently, mechanical properties were evaluated through tensile, impact toughness (ak), and fracture toughness (KIC) tests. Results indicate that the content of alpha eq is higher at lower forging heating temperature, whereas the content of alpha lath is diminished and the size of alpha fine remains relatively small. This tendency reverses at higher forging heating temperature due to the increased driving force of the phase transition. The rise in alpha lath content implies more pronounced interface strengthening and plastic deformation, which significantly contributes to strength compared to alpha fine and alpha eq but exerts a weaker influence on plasticity. Moreover, the combined deformation and fracture of alpha lath and alpha fine exert a significant influence on the initiation and propagation of cracks in ak and KIC specimens. The limited coordination of deformations exhibited by alpha lath leads to preferential stacking dislocations and shear fractures at interfaces, which are further influenced by its higher aspect ratio affecting crack propagation paths. This not only increases the required energy for initiating cracks but also raises energy consumption during their propagation. Crucially, the presence of alpha fine significantly enhances the dislocation accumulation and the plastic deformation zone at the crack tip, thereby playing a pivotal role in determining local deformation capacity and crack deflection frequency.