Al-Ag合金の優先析出現象

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タイトル別名
  • Preferential Precipitation Phenomena in an Aluminium-Silver Alloy
  • Al-Ag ゴウキン ノ ユウセン セキシュツ ゲンショウ

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An investigation has been carried out on preferential precipitation phenomena in an aluminium-5.5 wt% silver alloy using transmission electron microscopy. During aging at temperatures below 250°C of quenched and a few per cent tensile deformed specimens, narrow stacking faults were formed in each dislocation induced by the tensile deformation before aging and these stacking faults acted as nuclei for γ′ precipitates. When thin foils prepared from the same specimens were heated in the electron microscope using a hot stage, all dislocations were extended, but most of their configurations remained unchanged during the early aging. However, at the same time, nucleation of γ′ precipitates was observed at the surface of the foils and it reduced the preferential precipitation at dislocations. Observations of interaction between dislocations and precipitates in the deformed and aged specimens showed that most moving dislocations cut through these narrow stacking faults of dislocations and the dislocation cell structures were formed in a smilar way to those observed in the solid solution state of the alloy.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 28 (7), 378-384, 1964

    公益社団法人 日本金属学会

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