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2020 Vol.30, Issue 3 Preview Page
Effect of Casting Speed on Microstructure and Mechanical Properties of Al-Mg-Si/Al Hybrid Material by Duo-Casting
Sung Jin Park1
,
Jun-Young Suh2
,
Hee-Kwon Lee3
,
Si Young Chang2†
1Dept. of Materials Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan
2Dept. of Materials Engineering, Korea Aerospace University, Goyang 10540, Republic of Korea
3Dept. of Metallurgy and Materials Engineering, Changwon National University, Changwon 51140, Republic of Korea
†Corresponding author E-Mail : sychang@kau.ac.kr (S. Y. Chang, Korea Aerospace Univ.)
March 2020. pp. 111-116
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Abstract

Two different casting speeds of 60 and 80mm/min are adopted to determine the effect of casting speed on the microstructure and mechanical properties of Al-Mg-Si/Al hybrid material prepared by duo-casting. The obtained hybrid material has a uniform and straight macro-interface between the pure Al side and the Al-Mg-Si alloy side at both casting speeds. When the casting speed is increased to 80mm/min, the size of primary α phases in Al-Mg-Si alloy decreases, without change of shape. Although the Al-Mg-Si alloy produced at higher casting speed of 80mm/min shows much higher ultimate tensile strength (UTS) and 0.2 % proof stress and lower elongation, along with higher bending strength compared to the case of the 60mm/min in casting speed, the tensile properties and bending strength of the hybrid material, which are similar to those of pure Al, are the same regardless of the increase of casting speed. Despite the different casting speeds, deformation and fracturing in hybrid materials are observed only on the pure Al side. This indicates that the macro-interface is well-bonded, allowing it to endure tensile and bending deformation in all hybrid materials.

Keywords
duo-casting
Al-Mg-Si hybrid material
macro-interface
casting speed
mechanical properties
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 30
  • No :3
  • Pages :111-116
  • Received Date : 2020-02-03
  • Revised Date : 2020-03-09
  • Accepted Date : 2020-03-12
  • DOI :https://doi.org/10.3740/MRSK.2020.30.3.111
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