Bulletin of materials science | |
Microstructures and mechanical properties of Mg�?�Zn�?�Zr�?�Dy wrought magnesium alloys | |
J Xu3  K H Zheng3  Z H Huang2  M Liu3  X M Zhang1  W J Qi3  Z M Yu1  | |
[1] School of Materials Science and Engineering, Central South University, Changsha 410083, P.R. China$$School of Materials Science and Engineering, Central South University, Changsha 410083, P.R. ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, P.R. China$$;Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, P.R. China$$School of Materials Science and Engineering, Central South University, Changsha 410083, P.R. China$$Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, P.R. ChinaGuangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, P.R. China$$School of Materials Science and Engineering, Central South University, Changsha 410083, P.R. China$$School of Materials Science and Engineering, Central South University, Changsha 410083, P.R. ChinaGuangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, P.R. China$$School of Materials Science and Engineering, Central South University, Changsha 410083, P.R. China$$;Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, P.R. China$$Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, P.R. ChinaGuangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, P.R. China$$ | |
关键词: Wrought magnesium alloys; microstructure; mechanical property; extrusion.; | |
DOI : | |
学科分类:材料工程 | |
来源: Indian Academy of Sciences | |
【 摘 要 】
Microstructures and phase compositions of as-cast and extruded ZK60â€�?�ð�?�¥Dy (ð‘�? = 0â€�??5) alloys were analysed by optical microscope, scanning electron microscope, X-ray diffraction and differential scanning calorimetry. Meanwhile, the tensile mechanical property was tested.With increasing Dy content, Mgâ€�?�Znâ€�?�Dy new phase increases gradually, while MgZn2 phase decreases gradually to disappear. As-cast microstructure is refined gradually; meanwhile extruded one is refined further with decreasing average grain size to 1 ðœ‡m for ZK60â€�??4.32Dy alloy. Second phase, tending to distribute along grain boundary by continuous network in as-cast state, breaks and distributes dispersedly in extrusion state. As-cast tensile mechanical property remains almost unchanged at ambient temperature; however, extruded ones are enhanced significantly at ambient and elevated temperatures, respectively. Tensile strength at 298 and 473 K increases gradually from 355 and 120 MPa for ZK60 alloy to 395 and 171 MPa for ZK60â€�??4.32Dy alloy, respectively. Extruded tensile fractures exhibit a typical character of ductile fracture.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912010229755ZK.pdf | 1069KB | download |