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7075鋁合金對AZ91鎂合金組織和性能的影響
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遼寧省工業(yè)公關(guān)計劃資助項目（2013201018）


Effect of 7075 Al Alloy on Microstructures and Mechanical Properties of AZ91 Mg Alloy
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    摘要:

    為了研究7075鋁合金對AZ91鎂合金組織與性能的影響，采用光學(xué)顯微鏡、掃描電鏡、X 射線衍射儀、萬能材料試驗機研究了AZ91鎂合金的顯微組織與力學(xué)性能。結(jié)果表明：向AZ91鎂合金中加入7075鋁合金可使該合金的鑄態(tài)組織明顯細(xì)化，當(dāng)7075鋁合金含量超過4%（質(zhì)量分?jǐn)?shù)，下同）時，AZ91鎂合金鑄態(tài)組織中Mg17Al12相數(shù)量明顯減少，并且組織中生成了Al6Mn新相。合金抗拉強度與延伸率隨著7075鋁合金加入量的增加而提高，當(dāng)7075鋁合金的加入達到4%，其抗拉強度與延伸率達到最大值，分別為186 MPa和8.2%

    Abstract:

    In order to investigate the effect of 7075 aluminum alloy on the microstructure and mechanical properties of AZ91 magnesium alloy, the optical microscope, scanning electron microscope, X-ray diffraction method and universal material testing machine were used to analysis the microstructure and the mechanical properties of AZ91 magnesium alloy. The results indicate that the addition of 7075 aluminum alloy can refine the as-cast microstructure of AZ91 alloy obviously. The volume fraction of Mg17Al12 phase is decreased, and Al6Mn phase is formed when the addition content of 7075 aluminum alloy exceeds 4%. The tensile strength and elongation of AZ91 magnesium alloy increase with increasing of the addition amount of 7075 aluminum alloy. When the addition of 7075 aluminum alloy is 4%, the tensile strength and elongation of AZ91 alloy are at the maximum value, which are 186 MPa and 8.2%, respectively

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毛萍莉,楊春海,張 越,王 峰,劉 正.7075鋁合金對AZ91鎂合金組織和性能的影響[J].稀有金屬材料與工程,2013,42(12):2576~2580.[Mao Pingli, Yang Chunhai, Zhang Yue, Wang Feng, Liu Zheng. Effect of 7075 Al Alloy on Microstructures and Mechanical Properties of AZ91 Mg Alloy[J]. Rare Metal Materials and Engineering,2013,42(12):2576~2580.]
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  • 收稿日期:2012-12-19
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