Dynamic recrystallization and hot processing map of Ti-48Al-2Cr-2Nb alloy during the hot deformation
Chen, Xiaofei1; Tang, Bin1,2; Liu, Dong3; Wei, Beibei1; Zhu, Lei1; Liu, Renci3; Kou, Hongchao1,2; Li, Jinshan1,2
Corresponding AuthorTang, Bin(
AbstractDynamic recrystallization (DRX) mechanism of Ti-48Al-2Cr-2Nb (at. %) alloy was investigated by thermal uniaxial compression experiments in this work. The deformed microstructure showed that in addition to the discontinuous dynamic recrystallization (DDRX) with the typical feature of grain nucleation and growth, continuous dynamic recrystallization (CDRX) charactered by the crystal orientation accumulation also appeared in gamma grains during the hot compression at 1200 degrees C/0.01 s-1. The crystal orientations of CDRX grains were nearly close to the (001) orientation at the strain of 0.92. Also, the emergence of DRX in the gamma laths of lamellar colonies was confirmed by microstructure characterization, and the alpha 2 -* gamma phase transformation occurred simultaneously. On the other hand, the GOS threshold value for distinguishing the deformed grains and DRX grains was analyzed to quantitatively calculate the DRX volume fractions. A novel hot processing map with the strain of 0.92 based on the DRX volume fraction was established to obtain the deformation parameters for the full DRX and provide the theoretical results for optimizing the thermo-mechanical treatment of TiAl alloy (approximately 1100 degrees C/0.001 s-1 and 1200 degrees C/0.01 s-1).
KeywordTiAl alloy Discontinuous dynamic recrystallization (DDRX) Continuous dynamic recrystallization (CDRX) Hot processing map
Funding OrganizationNational Natural Science Foundation of China ; Aeronautical Science Foundation of China
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[51771150] ; Aeronautical Science Foundation of China[201936053001]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS IDWOS:000692236900001
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorTang, Bin
Affiliation1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
2.Northwestern Polytech Univ, Chongqing Innovat Ctr, Chongqing 401135, Peoples R China
3.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
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GB/T 7714
Chen, Xiaofei,Tang, Bin,Liu, Dong,et al. Dynamic recrystallization and hot processing map of Ti-48Al-2Cr-2Nb alloy during the hot deformation[J]. MATERIALS CHARACTERIZATION,2021,179:10.
APA Chen, Xiaofei.,Tang, Bin.,Liu, Dong.,Wei, Beibei.,Zhu, Lei.,...&Li, Jinshan.(2021).Dynamic recrystallization and hot processing map of Ti-48Al-2Cr-2Nb alloy during the hot deformation.MATERIALS CHARACTERIZATION,179,10.
MLA Chen, Xiaofei,et al."Dynamic recrystallization and hot processing map of Ti-48Al-2Cr-2Nb alloy during the hot deformation".MATERIALS CHARACTERIZATION 179(2021):10.
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