Coherency evaluation of <i>α</i>-Mg/C15-Al<sub>2</sub>Ca interface for a Mg-Al-Ca alloy

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  • Hisazawa Hiromu
    Graduate School of Technology, Industrial and Social Sciences, Tokushima University
  • Kashiwase Sakiko
    School of Materials and Chemical Technology, Tokyo Institute of Technology
  • Terada Yoshihiro
    School of Materials and Chemical Technology, Tokyo Institute of Technology

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Other Title
  • Mg-Al-Ca合金における<i>α</i>-Mg/C15-Al<sub>2</sub>Ca界面の整合性評価
  • Mg-Al-Ca合金におけるα-Mg/C15-Al₂Ca界面の整合性評価
  • Mg-Al-Ca ゴウキン ニ オケル a-Mg/C15-Al ₂ Ca カイメン ノ セイゴウセイ ヒョウカ

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Abstract

<p>The C15-Al2Ca precipitates were observed using high-resolution transmission electron microscopy (HRTEM) to identify the coherency of the α-Mg/C15-Al2Ca interface for the Mg-5Al-1.5Ca alloy aged at the temperature range from 548 to 598 K. The α/C15 coherent interface turned to the semi-coherent one by the introduction of misfit dislocations on the planar surface of the C15 precipitates for the alloy aged at 598 K for 1 h, whereas the coherency was maintained for the alloy aged at 548 K for 10 h. The curve showing the loss of interface coherency was drawn in the TTP diagram for the Mg-5Al-1.5Ca alloy, which is indicated that the α/C15 interface coherency has remained within 3.6×107 s (10000 h) at 500 K.</p>

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