431 Relationship between Aging Behaviors and Interfacial Reaction of Al_<18>B_4O_<33> Whisker Reinforced Magnesium Alloy Composites
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概要
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Aluminum borate (Al_<18>B_4O_<33>) whisker reinforced ZK60 (Mg-Zn-Zr) and AZ91D (Mg-Al-Zn) magnesium alloy composites were fabricated by squeeze and compo castings. Then influences of precipitate phase on hardness and interfacial reactions were investigated. All composites had good aging ability, but compo casting ZK60 matrix composites has low ability because of interfacial reaction at interface. As aging progressed isothermally, hardness of ZK60 composites decreased after peak aging. Nevertheless, when the hardness of AZ91D composite reached the peak, it would scarcely decrease. The time required to reach peak hardness of composites was shorter than that of monolithic alloy. The increment of hardness by aging treatment was approximately duplicate both monolithic alloy and composite fabricated by squeeze casting. As the ageing progressed distinct precipitates became apparent, sequence of precipitates in ZK60 composite was β_1 (MgZn_2) ⟶β_2 (MgZn_2) ⟶β (Mg_2Zn_3). In AZ91D composite, only continuous equilibrium β (Mg_<17>Al_<12>) phase was observed. After solution heat treatment, the effects of interfacial reactions on aging precipitates were negligible in ZK60 and AZ91D composites.
- 一般社団法人日本機械学会の論文
著者
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YANAGISAWA Osamu
Mechanical System Engineering, Graduate School of Engineering, Hiroshima University
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Sasaki Gen
Mechanical System Engineering Course Graduate School Of Engineering Hiroshima University
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Yanagisawa Osamu
Department Of Mechanical Materials Engineering Hiroshima University
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Sasaki Gen
Department Of Mechanical Materials Engineering Hiroshima University
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Sasaki Gen
Graduate school of Mechanical Engineering System, Hiroshima University
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MATSUGI Kazuhiro
Graduate School of Engineering, Hiroshima University
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YANAGISAWA Osamu
Graduate School of Engineering, Hiroshima University
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Wang Wenguang
Graduate School of Mechanical Engineering System, Hiroshima University
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Matsugi Kazuhiro
Mechanical System Engineering Course Graduate School Of Engineering Hiroshima University
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Wang Wenguang
Graduate School Of Mechanical Engineering System Hiroshima University:hiroshima University
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Matsugi Kazuhiro
Department Of Mechanical Materials Engineering Hiroshima University
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