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Open AccessArticle

Enhancing the Mechanical Properties of AZ80 Alloy by Combining Extrusion and Three Pass Calibre Rolling

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School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
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Magnesium Department, Korea Institute of Materials Science, Changwon 51508, Korea
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Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology, Tianjin 300130, China
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National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China
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School of Materials Science and Engineering, Shannghai Jiao Tong University, Shuanghai 200240, China
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Magnesium Technology Innovation Center, School of Materials Science and Engineering, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul 08826, Korea
*
Authors to whom correspondence should be addressed.
Metals 2020, 10(2), 249; https://doi.org/10.3390/met10020249
Received: 12 January 2020 / Revised: 30 January 2020 / Accepted: 6 February 2020 / Published: 13 February 2020
(This article belongs to the Special Issue Rolling of Metals)
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. View Full-Text
Keywords: AZ80; caliber rolling; mechanical property; bimodal microstructure AZ80; caliber rolling; mechanical property; bimodal microstructure
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MDPI and ACS Style

Meng, S.; Yu, H.; Zhou, J.; Han, H.; Li, Y.; Dong, L.; Nan, X.; Li, Z.; Shin, K.S.; Zhao, W. Enhancing the Mechanical Properties of AZ80 Alloy by Combining Extrusion and Three Pass Calibre Rolling. Metals 2020, 10, 249.

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