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首页> 外文期刊>Materials Science and Engineering >Mechanical properties and microstructure evolutions of multilayered Al-Cu composites produced by accumulative roll bonding process and subsequent annealing
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Mechanical properties and microstructure evolutions of multilayered Al-Cu composites produced by accumulative roll bonding process and subsequent annealing

机译：累积轧制和后续退火过程制备的多层Al-Cu复合材料的力学性能和组织演变

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摘要

In this investigation different thicknesses of Cu and Al strips were accumulative roll bonded (ARBed) to form five dissimilar multilayered Al-Cu composites. Also, to investigate the effect of annealing on the mechanical properties, selected ARBed composites were annealed at three different temperatures (300, 400 and 500 ℃) for four different periods (10,30,60 and 360 min). Different microstructural characterizations were conducted on the produced composites. The results demonstrated that by increasing the amount of Cu in the composites, tensile strength improved while elongation deteriorated. By increasing the annealing time and temperature, the tensile strength of the composites was remarkably decreased, after which it was increased while the elongation was increased rapidly and then decreased. This behavior was considered to be due to the restoration of the work-hardened metallic layers as well as formation of intermetallic compounds during annealing process. Corresponding fracture surfaces also revealed a brittle fracture in most of the annealed composites.
机译：在这项研究中，将不同厚度的Cu和Al条带累积轧制（ARBed），以形成5种不同的多层Al-Cu复合材料。另外，为了研究退火对机械性能的影响，将选定的ARBed复合材料在三个不同的温度（300、400和500℃）下退火四个不同的时间段（10、30、60和360分钟）。对生产的复合材料进行了不同的微观结构表征。结果表明，通过增加复合材料中Cu的含量，拉伸强度提高而伸长率降低。通过增加退火时间和温度，复合材料的抗张强度显着降低，此后增加，而伸长率迅速升高然后降低。这种行为被认为是由于加工硬化的金属层的恢复以及退火过程中金属间化合物的形成。相应的断裂表面在大多数退火复合材料中也显示出脆性断裂。

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