溶湯直接圧延法によるＡｌ‐Ｃｕ超塑性合金薄板の製造

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書誌事項

タイトル別名
  • Production of Al-Cu superplastic sheets by means of the melt direct rolling.
  • 溶湯直接圧延法によるAl-Cu超塑性合金薄板の製造
  • ヨウトウ チョクセツ アツエンホウ ニ ヨル Al-Cu チョウソセイ ゴウキン ウスイタ ノ セイゾウ

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抄録

In order to clarify the possibility of simple and novel process to produce superplastic thin sheet, melt direct rolling of Al–Cu alloys was investigated. Sound strips of Al–6%∼20%Cu alloys were successfully produced from molten state by the melt direct rolling process. 47%∼64% of rolling reduction was applied to the materials during melt direct rolling. Fine θ (Al2Cu) particles were distributed in the deformed matrix, though the distribution of θ phase was quite inhomogeneous through thickness location in the melt direct-rolled strips: θ (Cu) concentrated near the surface to show inverse segregation. The Al–Cu melt direct-rolled strips were provided for tensile tests at 520°C. Although elongation of the Al–6%–15%Cu melt direct-rolled strips was not large and hardly depended on strain rate, elongation of the Al–20%Cu strip largely depended on strain rate and showed the maximum value of 354% at a strain rate of 4.2 × 10−3s−1. At the strain rates where large elongation appeared, the strain rate sensitivity (m-value) reached up to 0.32. It could be concluded that it is possible to produce the supelplastic sheets of Al–20%Cu directly from molten state by means of the melt direct rolling.

収録刊行物

  • 軽金属

    軽金属 49 (8), 395-400, 1999

    一般社団法人 軽金属学会

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