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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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Compressive deformation behavior of an indirect-extruded Mg-8Sn-1Al-1Zn alloy

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Title
Compressive deformation behavior of an indirect-extruded Mg-8Sn-1Al-1Zn alloy
Author
Cheng, Wei-liQue, Zhong-pingZhang, Jin-shanXu, Chun-xiangLiang, WeiYou, Bong SunPark, Sung Soo
Keywords
Compression tests;  Compressive deformation behavior;  Deformation conditions;  High strain rates;  Low strain rates;  Low temperatures;  Microstructural investigation;  Oriented nucleation;  Recrystallized grains;  Selective growth;  Strain-rate-dependent;  True stress true strain curve;  Warm deformation
Issue Date
201301
Publisher
SPRINGER
Citation
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, v.20, no.1, pp.49 - 56
Abstract
The medium and warm deformation behaviors of an indirect-extruded Mg-8Sn-1Al-1Zn alloy were investigated by compression tests at temperatures between 298 and 523 K and strain rates of 0.001-10 s(-1). It was found that the twinning-slip transition temperature was strain rate dependent, and all the true stress-true strain curves could be divided into two groups: concave and convex curves. Associated microstructural investigations indicated that the dynamic recrystallization (DRX) behavior of the alloy varied with deformation conditions. At high strain rate and low temperature, dynamically recrystallized grains preferentially nucleated and developed in the twinned regions, indicating that twinning-induced DRX was dominant. While, at low strain rate, DRX developed extensively at grain boundaries and twins, and the process of twinning contributed to both oriented nucleation and selective growth. For the studied alloy, cracks mainly initiated from the shear band and twinning lamellar over the ranges of temperature and strain rate currently applied.
URI
http://scholarworks.unist.ac.kr/handle/201301/3066
DOI
http://dx.doi.org/10.1007/s12613-013-0692-9
ISSN
1674-4799
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MSE_Journal Papers
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