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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure Evolution and Mechanical and Corrosion Behavior of Accumulative Roll Bonded Mg-2%Zn/Al-7075 Multilayered Composite
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Microstructure Evolution and Mechanical and Corrosion Behavior of Accumulative Roll Bonded Mg-2%Zn/Al-7075 Multilayered Composite

机译：累积辊粘结Mg-2％Zn / Al-7075多层复合材料的微观结构演化与机械和腐蚀行为

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摘要

Multilayered composite of Mg-2%Zn/Al-7075 was developed by accumulative roll bonding (ARB) of wrought Mg-2%Zn and aluminum 7075 alloy. The Mg-2%Zn/Al-7075 multilayered composite exhibited density of 2295 kg/m(3) and an average grain size of 1 and 1.3 mu m in Mg-2%Zn and Al-7075 layers, respectively. A thorough microstructural characterization was performed on the composites by scanning electron microscope, electron backscatter diffraction (EBSD), transmission electron microscope and phase analysis by x-ray diffraction. In addition, mechanical properties were evaluated by microhardness and tensile tests. Corrosion behavior of the multilayered composite was examined using electrochemical polarization test. EBSD analysis showed the presence of ultrafine grains with high-angle grain boundaries. The composite exhibited a significant improvement in ultimate tensile strength (similar to 1.82 times) and elongation (similar to 1.5 times) as compared with Mg-2%Zn alloy, after four-pass ARB process.
机译：Mg-2％Zn / Al-7075的多层复合材料是由锻造Mg-2％Zn和铝7075合金的累积辊粘合（Arb）开发的。 Mg-2％Zn / Al-7075多层复合材料表现出密度为2295kg / m（3）的密度，平均晶粒尺寸为1和1.3μm，分别为Mg-2％Zn和Al-7075层。通过扫描电子显微镜，电子背散射衍射（EBSD），透射电子显微镜和通过X射线衍射进行透射电子显微镜和相位分析对复合材料进行彻底的微观结构表征。此外，通过微硬度和拉伸试验评估机械性能。使用电化学偏振试验检查多层复合物的腐蚀行为。 EBSD分析显示出具有高角度晶界的超细晶粒。与Mg-2％Zn合金相比，复合材料在四相牛排工序后，延长抗拉强度（类似于1.82次）和伸长率（类似于1.82次）和伸长率（类似于1.5倍）。

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