Mechanical and microstructural investigation of Zn/Sn multilayered composites fabricated by accumulative roll bonding (ARB) process
Mechanical and microstructural investigation of Zn/Sn multilayered composites fabricated by accumulative roll bonding (ARB) process
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DOI：
10.1016/j.jallcom.2017.08.241
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发表时间：
2017-12
影响因子：
6.2
通讯作者：
Amir Mashhadi;A. Atrian;Laleh Ghalandari
中科院分区：
文献类型：
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作者：
Amir Mashhadi;A. Atrian;Laleh Ghalandari
在本研究中，首次采用7次循环的累积滚焊（ARB）工艺制备了Zn/Sn复合材料。采用扫描电子显微镜（SEM）、能谱仪（EDS）和x射线衍射仪（XRD）对复合材料的微观结构进行了表征，并通过维氏显微硬度和拉伸试验对复合材料的力学性能进行了测试。结果表明，随着ARB循环次数的增加，由于各层力学行为的差异，Zn层首先发生颈缩，然后断裂，分散在Sn层之间。经过7次ARB循环，得到了具有波浪形界面和均匀分布的透镜状Zn碎片的层合复合材料。XRD结果表明，ARB过程中未形成新相。通过扫描电镜观察拉伸后试样的断口形貌。断口形貌表明，Zn层在所有循环中均为脆性断裂，Sn层在初始循环时为韧性断裂，随着ARB循环次数的增加，断裂模式转变为剪切韧性断裂。
In the present research, Zn/Sn composites were produced for the first time by accumulative roll bonding (ARB) process up to seven cycles. The microstructure evolution was evaluated by scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDS), X-ray diffraction (XRD) and the mechanical properties of Zn/Sn multilayered composites were measured by Vickers microhardness and tensile tests at different cycles of ARB process. It was observed that by increasing the ARB cycles, due to the differences in the mechanical behavior of the layers, Zn layers were necked at first, fractured and dispersed between Sn layers. After seven ARB cycles, a laminated composite with wavy interfaces and homogeneously distributed lenticular fragments of Zn was achieved. The XRD results showed that no new phase has been formed during the ARB process. Fracture surfaces of the samples after tensile tests were observed by SEM. Fracture surfaces revealed that fracture mode for the Zn layers was brittle at all cycles and fracture mode for the Sn layers was ductile at initial cycles and then changed to shear ductile fracture by increasing the ARB cycles.