Cu-Ti合金におけるセルラー析出と粒界無析出帯について

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タイトル別名
  • Cellular Precipitation and Precipitate Free Zone in Cu-Ti Alloys
  • Cu Ti ゴウキン ニ オケル セルラー セキシュツ ト リュウカイ ム セ

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Previously we reported on the changes of aspects of matrix precipitates in Cu-0.5, 1.0, 1.3, 2.0 and 4.0%Ti alloys. In this paper, we studied on precipitation due to grain boundary reaction with the same alloys. The results are summarized as follows:<BR>(1) Cellular precipitates are observed in higher Ti content alloys, and grain-boundary precipitates attend with PFZ are observed in lower Ti content alloys at the same aging temperature.<BR>(2) Width of PFZ observed in Cu-1%Ti alloys during aging at 450∼550°C, becomes narrower with aging time and then broader again with preferential growth of grain-boundary precipitates.<BR>(3) Nucleation sites of the cellular precipitates are considered to be the grain boundary surface in 4%Ti alloys and grain boundary edge in 2%Ti alloys in the aging at 450°C by the thory of Cahn. Activation energy for growth of cellular precipitates is about 30 kcal/mol for both alloys.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 38 (12), 1186-1191, 1974

    公益社団法人 日本金属学会

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