Dislocation analysis of a Mg–Al–Ca alloy by transmission electron microscopy

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

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  • 透過型電子顕微鏡法によるMg–Al–Ca合金の転位解析
  • トウカガタ デンシ ケンビキョウホウ ニ ヨル Mg-Al-Ca ゴウキン ノ テンイ カイセキ

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Abstract

<p>The dislocation structure was analyzed in a Mg–4.98Al–1.46Ca (mass%) alloy using invisible criterion with transmission electron microscopy. Basal and non-basal segment of dislocation induced during die-casting is determined as much 〈a〉 and a few 〈a+c〉 dislocation. After the aging at 523 K for 10 h and tensile deformation at 473 K, only basal 〈a〉 dislocation can be observed. This dislocation structure is not observed in crept specimens, which support the difference in dominant strengthening mechanism between creep and tensile deformation.</p>

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