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Park, Sung Soo
Metal Alloy Design (MADe) Lab
Research Interests
  • Metals and alloys, materials properties (mechanical/physical/electrochemical/functional), biomedical implants, metals corrosion

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Microstructure and mechanical properties of indirect-extruded Mg-8Sn-1Al-1Zn alloy with ultrafine grained structure

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Title
Microstructure and mechanical properties of indirect-extruded Mg-8Sn-1Al-1Zn alloy with ultrafine grained structure
Author
Cheng, WeiliHuo, RuiLu, YangjieYou, BongsunPark, Sung Soo
Issue Date
2014-11
Publisher
NORTHWEST INST NONFERROUS METAL RESEARCH
Citation
RARE METAL MATERIALS AND ENGINEERING, v.43, no.11, pp.2824 - 2828
Abstract
The microstructure evolution and mechanical properties of indirect-extruded Mg-8Sn-1Al-1Zn have been investigated by OM, SEM, XRD, EBSD, TEM and a stand universal testing machine. The results indicate that the high strength Mg-8Sn-1Al-1Zn alloy with ultrafine grained structure can be successfully fabricated by indirect extrusion at 250℃. During the extrusion process, most of the coarse grains were changed into fine equiaxed grains with average sizes of 1.92 μm. In addition, some nano-sized particles were observed by TEM in the alloy. The extruded alloy reveals a type of fiber texture in which basal poles are preferentially perpendicular to the ED. The formation of the ultra-fine grained structure was ascribed to the dynamic recrystallization and second phase. The tensile yield strength and compressive yield strength of the extruded alloys are 285 and 260 MPa, respectively. The R value of the alloy equals to 0.91. The superior strength and low yield asymmetry are mainly related to the fine-grained structure and dispersive fine second phase particles.
URI
https://scholarworks.unist.ac.kr/handle/201301/9627
ISSN
1002-185X
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