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金屬間化合物對(duì)累積疊軋Mg/Al多層復(fù)合板材斷裂過(guò)程的影響
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國(guó)家材料服役安全科學(xué)中心,哈爾濱工業(yè)大學(xué)材料學(xué)院

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）;中國(guó)博士后科學(xué)基金


Effect of intermetallic compounds on the fracture behavior of a Mg/Al laminated composite fabricated by accumulative roll bonding
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National Center for Materials Service Safety,University of Science and Technology Beijing,School of Material Science and Engineering,Harbin Institute of Technology

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    摘要:

    本文采用分步拉伸觀測(cè)的方法研究了累積疊軋Mg/Al多層復(fù)合板材中界面金屬間化合物對(duì)復(fù)合板材斷裂過(guò)程的影響。結(jié)果表明：在單向拉伸過(guò)程中,Mg/Al界面處金屬間化合物導(dǎo)致了裂紋的萌生和擴(kuò)展,從而導(dǎo)致Mg/Al界面的分離；在后續(xù)拉伸過(guò)程當(dāng)中,由于Mg層強(qiáng)度較低,首先產(chǎn)生頸縮失效,致使整個(gè)樣品提前斷裂。

    Abstract:

    Large amounts of massive cracked intermetallic compounds were observed at the interface of the laminated Mg/Al composite fabricated by accumulative roll bonding. Scanning electron microscopy revealed that the effect of these cracked intermetallic compounds dominated the fracture behavior of the accumulative roll bonded Mg/Al composite during uniaxial tensile testing. The results indicated that (i) obvious Mg/Al interface delamination was promoted by the cracked the intermetallic compounds, and (ii) the crack propagated into the softer Mg layer and leading to the rupture of Mg layer. These two factors led to premature failure of the laminated Mg/Al composite.

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常海,鄭明毅.金屬間化合物對(duì)累積疊軋Mg/Al多層復(fù)合板材斷裂過(guò)程的影響[J].稀有金屬材料與工程,2016,45(9):2242~2245.[H. Chang, M. Y. Zheng. Effect of intermetallic compounds on the fracture behavior of a Mg/Al laminated composite fabricated by accumulative roll bonding[J]. Rare Metal Materials and Engineering,2016,45(9):2242~2245.]
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  • 收稿日期:2015-03-19
  • 最后修改日期:2015-06-03
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2016-10-09
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