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Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy
Hu Honglei1,2; Zhao Mingjiu1; Rong Lijian1
Corresponding AuthorZhao Mingjiu(mjzhao@imr.ac.cn)
2020
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume49Issue:1Pages:131-137
AbstractThe researches in the area of grain boundary engineering were mainly focused on the relationship between process, microstructure and properties. However, little attention had been paid to the formation and evolution process of low Sigma CSL grain boundaries. To better understand the dynamic process, electron backscatter diffraction (EBSD) was used to analyze the grain boundary migration and evolution in J75 alloy. Single-step deformation heat treatment with 5% pre-deformation and 1000 degrees C annealing was used to increase the proportion of low-Sigma CSL grain boundaries to over 70%, and formed grain clusters with Sigma 3(n) orientation relationship to break the connectivity of random grain boundaries. During the annealing process, the migration ability of Sigma 3(ic) was strong, and when it encountered other Sigma 3, Sigma 9 would be formed; in addition, Sigma 3 with Sigma 9 would lead to Sigma 3+Sigma 9 -> Sigma 27 or Sigma 9+Sigma 3 -> Sigma 3 processes, and the latter was more likely to occur. The Sigma 3 regeneration was closely related to the Sigma 3(ic) grain boundary; a mechanism for breaking the connectivity of random grain boundary network was proposed. When random grain boundary met low Sigma CSL grain boundary, R/Sigma would form. If the ratio (R/Sigma)<= 29, the connectivity of random grain boundaries network could be interrupted.
KeywordFe-Ni based alloys J75 low Sigma CSL grain boundary grain boundary character distribution grain boundary evolution
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000509418200017
PublisherNORTHWEST INST NONFERROUS METAL RESEARCH
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137468
Collection中国科学院金属研究所
Corresponding AuthorZhao Mingjiu
Affiliation1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Hu Honglei,Zhao Mingjiu,Rong Lijian. Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2020,49(1):131-137.
APA Hu Honglei,Zhao Mingjiu,&Rong Lijian.(2020).Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy.RARE METAL MATERIALS AND ENGINEERING,49(1),131-137.
MLA Hu Honglei,et al."Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy".RARE METAL MATERIALS AND ENGINEERING 49.1(2020):131-137.
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