DOI QR코드

DOI QR Code

EFFECT OF Fe CONTENT ON THE MECHANICAL PROPERTIES AND THERMAL CONDUCTIVITY OF THE Al-RE ALLOYS

  • HYO-SANG YOO (EV COMPONENTS & MATERIALS R&D GROUP (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY) ;
  • YONG-HO KIM (EV COMPONENTS & MATERIALS R&D GROUP (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY) ;
  • HYEON-TAEK SON (EV COMPONENTS & MATERIALS R&D GROUP (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY)
  • Published : 20200000

Abstract

In this study, we investigated the effect of Fe addition (0, 0.25, 0.50 and 0.75 wt.%) on the microstructure, mechanical properties and electrical conductivity of as-cast and as-extruded Al-RE alloys. As the Fe element increased by 0 and 0.75wt.%, the phase fraction increased to 5.05, 5.76, 7.14 and 7.38 %. The increased intermetallic compound increased the driving force for recrystallization and grain refinement. The electrical conductivity of Al-1.0 wt.%RE alloy with Fe addition decreased to 60.29, 60.15, 59.58 and 59.13 %IACS. With an increase in the Fe content from 0 to 0.75 wt.% the ultimate tensile strength (UTS) of the alloy increased from 74.3 to 77.5 MPa. As the mechanical properties increase compared to the reduction of the electrical conductivity due to Fe element addition, it is considered to be suitable for fields requiring high electrical conductivity and strength.

Keywords

Acknowledgement

This work was supported by the 'Energy Efficiency and Resources Core Technology Program' of Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Trade, Industry and Energy, Republic of Korea. (No. 2018201010633B).