Mechanical properties of Mn added Al-10%Si-0.7%Mg system alloys fabricated by selective laser melting

Mitsuru Adachi, Daisuke Terada, Shotaro Yusa, Shuji Koiwai, Yoshiki Hashizume, Isao Murakami, Shigeto Yamasaki, Wansong Li, Masatoshi Mitsuhara, Hideharu Nakashima

Research output: Contribution to journalArticlepeer-review

Abstract

The mechanical properties of Al-10%Si-Mg system alloys containing Mn up to 1.5% fabricated by selective laser melting (SLM) with preheat temperature of 160°Cor 200°Cfor 15hours were studied by means of tensile test, hardness measurement and DSC analysis. The strength of the Mn added alloys was about 100 to 150MPa higher than that of the Mn free alloy. The bottom of the 1.5%Mn added alloy showed about 500MPa and 400MPa under preheat condition of 160°C and 200°C, respectively. Many compounds containing Si with size of about 40nm were observed at the bottom of the 1.5%Mn added alloy with preheat temperature of 200°C by STEM-BF image. Mn enriched zone was observed at eutectic (α-Al, Si) area of the 1.5%Mn added alloy by STEM-EDS. It is possible that Mn enriched zone directly or indirectly causes the high strength.

Original languageEnglish
Pages (from-to)441-449
Number of pages9
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume71
Issue number10
DOIs
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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