Effects of cold rolling on the phase change of Al<sub>6</sub>Fe to Al<sub>3</sub>Fe in an Al-0.5%Fe alloy

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  • Ａｌ‐０．５Ｆｅ合金に生じるＡｌ?S６?TＦｅ相の相変化に及ぼす冷間加工の影響
  • Al 0 5パーセント Fe ゴウキン ニ ショウジル Al6Feソウ ノ ソ

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Abstract

The phase change of metastable Al6Fe to stable Al3Fe phase in an Al-0.5%Fe alloy affected by cold rolling was studied in detail by means of optical and transmission electron microscopies etc. The alloys as-cast and cold-rolled were isothermally annealed at 500 to 600°C for short times mainly up to 30sec. Working accelerates the phase change. The reason is attributed to the facts that: The Al6Fe rod is divided into several parts, the number of which increases with the rolling reduction; The Al3Fe phase nucleates during annealing at the front of divided rod. The total number of Al3Fe nuclei increases in the cold-rolled alloy than in the usual as-cast alloy.

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