Improving Joint Morphologies and Tensile Strength of Al/Mg Dissimilar Alloys Friction Stir Lap Welding by Changing Zn Interlayer Thickness
查看参考文献30篇
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文摘
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The pure Zn foils with diff erent thicknesses (0.02,0.05,0.1,0.2 and 0.3 mm) were selected as interlayers to improve the quality of friction stir lap welding joint of 7075-T6 Al and AZ31B Mg dissimilar alloys.The eff ects of the interlayer thickness on joint formation,microstructure and tensile strength were analyzed.The results displayed that the maximum length of the boundary between stir zone (SZ) and thermo-mechanically aff ected zone in lower plate was obtained by the addition of the Zn interlayer with 0.05 mm thickness.The Mg–Zn intermetallic compounds (IMCs) were discontinuously distributed in the SZ,replacing the continuous Al–Mg IMCs.The size of Mg–Zn IMCs increased with the increase in the thickness of the Zn interlayer.The maximum tensile shear strength of 276 N mm~(–1) was obtained by the addition of 0.05 mm Zn foil,which increased by 45.6% of that of the joint without the Zn foil addition. |
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来源
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Acta Metallurgica Sinica(English Letters)
,2019,32(11):1385-1395 【核心库】
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DOI
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10.1007/s40195-019-00937-9
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关键词
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Al/Mg dissimilar alloys
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Friction stir lap welding
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Zn foil thickness
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Microstructure
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Tensile shear strength
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地址
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1.
College of Aerospace Engineering,Shenyang Aerospace University, Shenyang, 110136
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Shenyang Institute of Standardization, Shenyang, 110021
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1006-7191 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:6613339
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