Effect of hydrogen content, melt cleanliness and solidification conditions on tensile properties of A356 alloy


Akhtar S., DIŞPINAR D. , Arnberg L., Di Sabatino M.

INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, cilt.22, ss.22-25, 2009 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 22
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1179/136404609x367245
  • Dergi Adı: INTERNATIONAL JOURNAL OF CAST METALS RESEARCH
  • Sayfa Sayısı: ss.22-25

Özet

In this study, the influence of hydrogen content, melt cleanliness and solidification conditions on the porosity distribution and mechanical properties have been investigated in a laboratory scale step mould casting with an A356 alloy. Three hydrogen levels, namely 0.10, 0.20 and 0.40 mL/100 g, were reached by treatment of the melt by Ar degassing, Ar-10H(2) and Ar water vapour mixture respectively. The hydrogen content of the melt was continuously measured. For each hydrogen level, two castings were produced, namely with and without filter. Porosity was increased with increasing hydrogen content but there was no significant effect of filtration. Moreover, similar tensile properties were achieved with different hydrogen levels and different porosity levels.