Enhancing the Mechanical Properties of AZ80 Alloy by Combining Extrusion and Three Pass Calibre Rolling
Shuaiju Meng,
Hui Yu,
Jun Zhou,
Haisheng Han,
Yongyan Li,
Lishan Dong,
Xiaolong Nan,
Zhongjie Li,
Kwang Seon Shin,
Weimin Zhao
Affiliations
Shuaiju Meng
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hui Yu
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Jun Zhou
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Haisheng Han
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Yongyan Li
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Lishan Dong
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Xiaolong Nan
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China
Zhongjie Li
School of Materials Science and Engineering, Shannghai Jiao Tong University, Shuanghai 200240, China
Kwang Seon Shin
Magnesium Technology Innovation Center, School of Materials Science and Engineering, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul 08826, Korea
Weimin Zhao
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
An AZ80 alloy with ultra-high strength and good ductility has been successfully prepared by a novel processing route of combining extrusion and caliber rolling. The caliber rolled (CRed) AZ80 alloy has a necklace grain structure with ultrafine dynamic recrystallized (DRXed) grains formed around the micro-scale deformed grains, which is remarkably different from the uniform microstructure of as-extruded sample free from caliber rolling. In addition, both the deformed region and the DRXed part in CRed AZ80 alloy exhibit more random basal texture than that of the as-extruded sample. Furthermore, the CRed AZ80 alloy demonstrates an excellent comprehensive mechanical property with the ultimate tensile strength of 446MPa and elongation of 13%, respectively. These good mechanical properties of CRed AZ80 alloy can be attributed to the synthetic effects of necklace bimodal microstructure containing ultra-fine grains, profuse Mg17Al12 precipitates, and the modified texture.
