Influence of Fe contents on fracture toughness of Al-7.5%Si-3%Cu-0.3%Mg alloy castings

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  • Ａｌ‐７．５％Ｓｉ‐３％Ｃｕ‐０．３％Ｍｇ合金鋳物の破壊じん性に及ぼすＦｅ量の影響
  • Al 7 5パーセント Si 3パーセント Cu 0 3パーセント Mg ゴウ

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Abstract

The influences of Fe and Fe+Mn contents were studied by a double torsion bending test. The fracture toughness of as cast and aged alloys is unsusceptible to Fe concentration less than 0.57wt%. When the Fe content is increased up to 1wt%, the fracture toughness lowers by about 20%. Although increase in Fe+Mn content from 0.32 to 1.67wt% has little effect on the fracture toughness, the alloy containing Fe 1wt% and Mn 0.71wt% has improved fracture toughness.

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