Al-1.0%Fe合金に生じる準安定相の相変化

鈴木 寿; 菅野 幹宏; 田辺 英男; 糸井 一博

doi:10.2464/jilm.28.284

The metastable to stable phase change in an Al-1.0%Fe alloy

Hisashi SUZUKI, Motohiro KANNO, Hideo TANABE, Kazuhiro ITOI

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JOURNAL FREE ACCESS

1978 Volume 28 Issue 6 Pages 284-291

DOI https://doi.org/10.2464/jilm.28.284

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Published: June 30, 1978 Received: February 02, 1978 Available on J-STAGE: July 23, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 23, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : Optical and transmission electron microscopies and X-ray diffraction were carried out on transformation of a metastable Al₆Fe or AlmFe in the eutectic structure in relation to the "fir tree structure". Specimens containing either Al₆Fe or AlmFe in the eutectic were isothermally annealed at 500° to 600°C. As for Al₆Fe→Al₃Fe transformation, stable Al₃Fe nucleates at the edge of rod-shaped Al₆Fe contacting to the matrix-eutectic interface in the early stage of annealing. It grows with dissolution of Al₆Fe facing to the stable Al₃Fe. The AlmFe transforms into Al₃Fe in the same mode. The estimated activation energy 1.4 to 1.6eV for Al₆Fe→Al₃Fe transformation suggests that the transformation is controlled by the diffusion of dissolved Fe atoms in the α-phase in the eutectic. None of intermediate phase is found during the transformation. The time required for eliminating AlmFe is shorter than that for eliminating Al₆Fe, probably due to a narrower region of the eutectic in the former.
Right : Optical and transmission electron microscopies and X-ray diffraction were carried out on transformation of a metastable Al₆Fe or Al_mFe in the eutectic structure in relation to the "fir tree structure". Specimens containing either Al₆Fe or Al_mFe in the eutectic were isothermally annealed at 500° to 600°C. As for Al₆Fe→Al₃Fe transformation, stable Al₃Fe nucleates at the edge of rod-shaped Al₆Fe contacting to the matrix-eutectic interface in the early stage of annealing. It grows with dissolution of Al₆Fe facing to the stable Al₃Fe. The Al_mFe transforms into Al₃Fe in the same mode. The estimated activation energy 1.4 to 1.6eV for Al₆Fe→Al₃Fe transformation suggests that the transformation is controlled by the diffusion of dissolved Fe atoms in the α-phase in the eutectic. None of intermediate phase is found during the transformation. The time required for eliminating Al_mFe is shorter than that for eliminating Al₆Fe, probably due to a narrower region of the eutectic in the former.

Date of correction: July 23, 2008 Reason for correction: - Correction: CITATION Details: [in Japanese]

Date of correction: July 23, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

Optical and transmission electron microscopies and X-ray diffraction were carried out on transformation of a metastable Al₆Fe or Al_mFe in the eutectic structure in relation to the "fir tree structure". Specimens containing either Al₆Fe or Al_mFe in the eutectic were isothermally annealed at 500° to 600°C. As for Al₆Fe→Al₃Fe transformation, stable Al₃Fe nucleates at the edge of rod-shaped Al₆Fe contacting to the matrix-eutectic interface in the early stage of annealing. It grows with dissolution of Al₆Fe facing to the stable Al₃Fe. The Al_mFe transforms into Al₃Fe in the same mode. The estimated activation energy 1.4 to 1.6eV for Al₆Fe→Al₃Fe transformation suggests that the transformation is controlled by the diffusion of dissolved Fe atoms in the α-phase in the eutectic. None of intermediate phase is found during the transformation. The time required for eliminating Al_mFe is shorter than that for eliminating Al₆Fe, probably due to a narrower region of the eutectic in the former.

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