文献类型：期刊文献

英文题名：Hot-Working Properties of Ni-Based Superalloy GH4169 in Different Initial States

作者：Ling, Min Zhang, Zi-Sheng Liang, Yi-Long Tan, Yuan-Biao

第一作者：Ling, Min;凌敏

通信作者：Liang, YL[1];Liang, YL[2];Liang, YL[3]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyan 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyan 550025, Peoples R China;[3]Guizhou Aerosp Xinli Technol Co LTD, Zunyi 563000, Guizhou, Peoples R China;[4]Guizhou Univ, Coll Mat & Met, Guiyan 550025, Peoples R China;[5]Highperformance Met Struct Mat & Adv Mfg Technol, Natl & Local Joint Engn Lab, Guiyan 550025, Peoples R China;[6]Key Lab Mech Behav & Microstruct Mat Guizhou P, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyan 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyan 550025, Peoples R China;corresponding author), Highperformance Met Struct Mat & Adv Mfg Technol, Natl & Local Joint Engn Lab, Guiyan 550025, Peoples R China;corresponding author), Key Lab Mech Behav & Microstruct Mat Guizhou P, Guiyang 550003, Peoples R China.

年份：0

外文期刊名：JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

收录：;EI(收录号：20221011762561);Scopus(收录号：2-s2.0-85125771933);WOS:【SCI-EXPANDED(收录号:WOS:000766051200001)】；

基金：This study was funded by the Central Government Guides Local Science and Technology Development (Grant No. [2019] 4011), the Industrial and Information Development of Guizhou Province (Grant No. [2016] 034), and the Technology Development Project (Grant No. 2017033).

语种：英文

外文关键词：deformation mechanism; GH4169; hot deformation; initial state

摘要：The hot deformation behaviour of the GH4169 alloy in two different initial states (homogeneous and mixed-crystal states) was investigated by performing isothermal compression tests at different strain rates (0.01-1 s(-1)) and deformation temperatures (1050-1150 degrees C). Hot-working diagrams were established for both alloy types, and the microstructural evolution in both alloy types during hot deformation was analysed to determine the corresponding deformation mechanism. The experimental results showed that the peak stress of the homogeneous alloy was lower than that of the mixed-crystal alloy for the same temperature and strain rate. Based on the processing maps, the flow instability domain of the homogeneous alloy exceeded that of the mixed-crystal alloy. The optimal processing parameters of the homogeneous alloy were 0.01-0.1 s(-1)/1050-1100 degrees C, and 0.01-0.1 s(-1)/1050-1080 degrees C (at a lower strain state) or 1100-1150 degrees C (at a higher strain state) was optimal for the mixed-crystal alloy. Microstructural analysis revealed that the differences in the hot deformation behaviour of the homogeneous and mixed-crystal alloys were caused by the different initial grain sizes and dynamic recrystallization (DRX) mechanisms. The main DRX nucleation method of the homogeneous alloy was discontinuous DRX, whereas that of the mixed-crystal alloy was continuous DRX and discontinuous DRX.