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Microstructure Formation Mechanism During a Novel Semisolid Rheo-rolling Process of AZ91 Magnesium Alloy
Alternative TitleMicrostructure Formation Mechanism During a Novel Semisolid Rheo-rolling Process of AZ91 Magnesium Alloy
Zhao Zhanyong; Guan Renguo; Wang Xiang; Liu Chunming
2013
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume26Issue:4Pages:447-454
AbstractA novel semisolid rheo-rolling process of AZ91 alloy was proposed. The microstructure formation mechanism of AZ91 magnesium alloy during the process was studied. The results reveal that the eruptive nucleation and the heterogeneous nucleation exist. During the grain growth process, the grain breakage took place and transformed into fine spherical or rosette grains on the sloping plate gradually, the other grain growth style is direct globular growth. Due to the secondary crystallization of the remnant liquids in the roll gap, the microstructure of the strip becomes finer with the increment of the casting temperature from 650 degrees C to 690 degrees C. But when the casting temperature reached 710 degrees C, a part of the liquid alloy transformed into the eutectic phases, and the primary grains ripened to form coarse dendrites. In the casting temperature range from 650 degrees C to 690 degrees C, AZ91 alloy strip with fine spherical or rosette grains was prepared by the proposed process.
Other AbstractA novel semisolid rheo-rolling process of AZ91 alloy was proposed. The microstructure formation mechanism of AZ91 magnesium alloy during the process was studied. The results reveal that the eruptive nucleation and the heterogeneous nucleation exist. During the grain growth process, the grain breakage took place and transformed into fine spherical or rosette grains on the sloping plate gradually, the other grain growth style is direct globular growth. Due to the secondary crystallization of the remnant liquids in the roll gap, the microstructure of the strip becomes finer with the increment of the casting temperature from 650℃ to 690℃. But when the casting temperature reached 710℃, a part of the liquid alloy transformed into the eutectic phases, and the primary grains ripened to form coarse dendrites. In the casting temperature range from 650℃ to 690℃, AZ91 alloy strip with fine spherical or rosette grains was prepared by the proposed process.
KeywordSLOPING PLATE PROCESS SOLIDIFICATION BEHAVIORS EVOLUTION TEXTURE EXTRUSION AL Semisolid Rolling AZ91 alloy Microstructure
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation for Outstanding Young Scholars of China] ; [National Natural Science Foundation of China] ; [Fok Ying Tong Education Foundation] ; [Basic Scientific Research Operation of Center University] ; [Chinese National Program for Fundamental Research and Development]
CSCD IDCSCD:4896504
Citation statistics
Cited Times:8[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155540
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhao Zhanyong,Guan Renguo,Wang Xiang,et al. Microstructure Formation Mechanism During a Novel Semisolid Rheo-rolling Process of AZ91 Magnesium Alloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2013,26(4):447-454.
APA Zhao Zhanyong,Guan Renguo,Wang Xiang,&Liu Chunming.(2013).Microstructure Formation Mechanism During a Novel Semisolid Rheo-rolling Process of AZ91 Magnesium Alloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,26(4),447-454.
MLA Zhao Zhanyong,et al."Microstructure Formation Mechanism During a Novel Semisolid Rheo-rolling Process of AZ91 Magnesium Alloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS 26.4(2013):447-454.
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