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界面对铜/铝异步轧制层状复合材料组织与性能的影响
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材料电磁过程研究教育部重点实验室

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NSFC(51690161)


Effect of interface on microstructure and mechanical properties of Cu/Al laminated composite produced by asymmetrical roll bonding and annealing
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Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University

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    摘要:

    利用异步轧制复合技术和退火工业制备铜/铝层状复合材料,利用扫描电子显微镜观察界面微观组织和拉伸断口形貌,进行剥离和拉伸实验研究界面的力学性能。实验结果表明,热处理过程促进了界面层的形成,而较高的退火温度破坏了界面结合。层状复合材料的拉伸性能介于两组元金属之间。经340 °C退火后,铜基体的延伸性能与铝基体接近,并且界面开裂程度较低。在拉伸过程中,两金属基体延伸率不同,导致界面发生内部断裂。界面作为铜、铝之间的过渡层,在强化复合材料方面起到重要作用。

    Abstract:

    The interfacial microstructure and fractography of Cu/Al laminated composite fabricated by asymmetrical roll bonding and annealing were studied by scanning electron microscope. The peeling and tension tests were carried out to investigate the mechanical properties of interface. The results show that the interfacial interlayer is improved by heat treatment and higher annealing tenmperature weaken the interfacial bonding. The tensile properties of laminated composites fall in between two metal components. After annealed at 340 °C, copper substrate is nearly equal to aluminium substrate in ductility, and the crack degree of interface is lower. The mismatch elongation of metal substrates leads to the internal fracture of interlayer during tension tests. The interface plays an important role in strengthening the laminated composite as a transition between copper and aluminum.

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常东旭,王平.界面对铜/铝异步轧制层状复合材料组织与性能的影响[J].稀有金属材料与工程,2020,49(1):85~92.[Chang Dongxu, Wang Ping. Effect of interface on microstructure and mechanical properties of Cu/Al laminated composite produced by asymmetrical roll bonding and annealing[J]. Rare Metal Materials and Engineering,2020,49(1):85~92.]
DOI:10.12442/j. issn.1002-185X.20180900

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  • 收稿日期:2018-08-30
  • 最后修改日期:2018-11-06
  • 录用日期:2018-11-08
  • 在线发布日期: 2020-02-16
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