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Effect of Thermo-Mechanical Processing on Grain Boundary Character Distribution of GH3625 Superalloy
Gao Yubi; Ding Yutian; Chen Jianjun; Xu Jiayu; Ma Yuanjun; Wang Xingmao
2019-11
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume48Issue:11Pages:3585-3592
AbstractWith this prerequisite that the chemical composition of GH3625 alloy will not be changed, the high temperature microstructure stability and service performance reliability of alloys are improved by optimizing grain boundary engineering (GBE) and controlling the microstructure of alloys. The effect of thermal-mechanical processing on the grain boundary character distribution (GBCD) of GH3625 superalloy was investigated by the electron backscattered diffraction (EBSD) technique and orientation image microcopy (OIM). The results show that the optimization of the grain boundary character distribution (GBCD) of GH3625 superalloy is mainly achieved by Sigma 3(n) grain boundaries formed during the recrystallization process, and is mainly affected by the cold deformation and annealing process. The length fraction of low Sigma CSL grain boundaries in GH3625 superalloy decreases with the increase of cold deformation, while increases with the increase of annealing temperature. Meanwhile, the length fraction of low Sigma CSL (coincident site lattice, Sigma <= 29 by Palunbo-Aust criterion) grain boundaries increases to more than 63.16% after 35% cold deformed and subsequent annealing at 1120 degrees C for 15 min. In addition, large sized grain-clusters appear in GH3625 superalloy, and boundaries have Sigma 3(n) misorientations inside the grains-cluster. The size of the grain-clusters and the amount of Sigma 3(n) grain boundaries inside the grains-cluster decrease with the increase of cold deformation, but increase with the increase of annealing temperature.
KeywordGH3625 alloy thermo-mechanical processing grain boundary character distribution grain boundary engineering low Sigma CSL grain boundary
Indexed BySCI
Language中文
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000500083600024
PublisherNORTHWEST INST NONFERROUS METAL RESEARCH
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64323
Collection兰州理工大学
省部共建有色金属先进加工与再利用国家重点实验室
Corresponding AuthorDing Yutian
AffiliationLanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Corresponding Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
First Signature AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Recommended Citation
GB/T 7714
Gao Yubi,Ding Yutian,Chen Jianjun,et al. Effect of Thermo-Mechanical Processing on Grain Boundary Character Distribution of GH3625 Superalloy[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(11):3585-3592.
APA Gao Yubi,Ding Yutian,Chen Jianjun,Xu Jiayu,Ma Yuanjun,&Wang Xingmao.(2019).Effect of Thermo-Mechanical Processing on Grain Boundary Character Distribution of GH3625 Superalloy.RARE METAL MATERIALS AND ENGINEERING,48(11),3585-3592.
MLA Gao Yubi,et al."Effect of Thermo-Mechanical Processing on Grain Boundary Character Distribution of GH3625 Superalloy".RARE METAL MATERIALS AND ENGINEERING 48.11(2019):3585-3592.
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