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Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells
Alternative TitleSemisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells
Guan Renguo1; Chen Liqing2; Cao Furong1; Zhao Zhanyong1; Ren Yong2
2011
Source PublicationINTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN1674-4799
Volume18Issue:6Pages:665-670
AbstractA semisolid slurry of AZ31 magnesium alloy was prepared by vibrating wavelike sloping plate process, and the semisolid die forging process, microstructures, and properties of the magnesium alloy mobile telephone shell were investigated. The semisolid forging process was performed on a YA32-315 four-column universal hydraulic press. The microstructures were observed by optical microscopy, the hardness was analyzed with a model 450SVD Vickers hardometer, the mechanical properties was measured with a CMT5105 tensile test machine, and the fractograph of elongated specimens was observed by scanning electron microscopy (SEM). The results reveal that with the increase of die forging force, the microstructures of the product become fine and dense. A lower preheating temperature and a longer dwell time are favorable to the formation of fine and dense microstructures. The optimum process conditions of preparing mobile telephone shells with excellent surface quality and microstructures are a die forging force of 2000 kN, a die preheating temperature of 250 degrees C, and a dwell time of 240 s. After solution treatment at 430 degrees C and aging at 220 degrees C for 8 h, the Vickers hardness is 61.7 and the ultimate tensile strength of the product is 193 MPa. Tensile fractographs show the mixing mechanisms of quasi-cleavage fracture and ductile fracture.
Other AbstractA semisolid slurry of AZ31 magnesium alloy was prepared by vibrating wavelike sloping plate process, and the semisolid die forging process, microstructures, and properties of the magnesium alloy mobile telephone shell were investigated. The semisolid forging process was performed on a YA32-315 four-column universal hydraulic press. The microstructures were observed by optical microscopy, the hardness was analyzed with a model 450SVD Vickers hardometer, the mechanical properties was measured with a CMT5105 tensile test machine, and the fractograph of elongated specimens was observed by scanning electron microscopy (SEM). The results reveal that with the increase of die forging force, the microstructures of the product become fine and dense. A lower preheating temperature and a longer dwell time are favorable to the formation of fine and dense microstructures. The optimum process conditions of preparing mobile telephone shells with excellent surface quality and microstructures are a die forging force of 2000 kN, a die preheating temperature of 250°C, and a dwell time of 240 s. After solution treatment at 430°C and aging at 220°C for 8 h, the Vickers hardness is 61.7 and the ultimate tensile strength of the product is 193 MPa. Tensile fractographs show the mixing mechanisms of quasi-cleavage fracture and ductile fracture.
KeywordSLOPING PLATE PROCESS ALUMINUM-ALLOY ALSI7MG STATE magnesium alloys semisolid forging microstructure mechanical properties fracture
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Ministry of Education of China]
CSCD IDCSCD:4381279
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/145416
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.东北大学
Recommended Citation
GB/T 7714
Guan Renguo,Chen Liqing,Cao Furong,et al. Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2011,18(6):665-670.
APA Guan Renguo,Chen Liqing,Cao Furong,Zhao Zhanyong,&Ren Yong.(2011).Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,18(6),665-670.
MLA Guan Renguo,et al."Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 18.6(2011):665-670.
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