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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
Sponsored by：Jiangxi University Of Science And Technology
Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 15 Issue 1
Feb.  2024
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LIU Chunlin, TANG Yanchuan, ZHANG Qingzhu, QIN Xinbao, LANG Pengjiang, ZHANG Xinlei. Effect of layer hardness ratio on strength and toughness of Cu-Be/Cu layered composite materials with heterostructure[J]. Nonferrous Metals Science and Engineering, 2024, 15(1): 67-79. DOI: 10.13264/j.cnki.ysjskx.2024.01.009
Citation: LIU Chunlin, TANG Yanchuan, ZHANG Qingzhu, QIN Xinbao, LANG Pengjiang, ZHANG Xinlei. Effect of layer hardness ratio on strength and toughness of Cu-Be/Cu layered composite materials with heterostructure[J]. Nonferrous Metals Science and Engineering, 2024, 15(1): 67-79. DOI: 10.13264/j.cnki.ysjskx.2024.01.009
shu

Effect of layer hardness ratio on strength and toughness of Cu-Be/Cu layered composite materials with heterostructure

  • 1.

    School of Materials Science and Engineering, East China Jiaotong University, Nanchang330013, China

  • 2.

    State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang330013, China

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  • Received Date: January 30, 2023
  • Revised Date: May 07, 2023
    Graphical Abstract
    • Abstract
  • The Cu-Be/Cu layered heterogeneous composite materials with different layer hardness ratios (RCu-Be/Cu=3.0, 5.0, 7.0) were prepared by vacuum hot pressing bonding, cold rolling and subsequent heat treatments. The effects of RCu-Be/Cu with different interlayer hardness ratio on the balance of strength and ductility and the strain hardening rate of the composites were investigated. Furthermore, the effect of heterogeneous deformation induced (HDI) hardening on the strain hardening behavior of composites with different RCu-Be/Cu was also studied. The results show that the ultimate tensile strength increases and the uniform elongation decreases with the increase of the interlayer hardness ratio. However, the ultimate tensile strength of the composites is higher than the value calculated by the rule of mixture (ROM). Moreover, the uniform elongation is also higher than that of the corresponding Cu-Be component, among which the composites with RCu-Be/Cu of 5.0 possess the best balance of strength and ductility. The extra strain hardening effect in the layered composite materials with heterostructure can be caused by HDI hardening. The effect of HDI hardening on strain hardening is relatively weak in the composites with RCu-Be/Cu of 3.0, while the HDI hardening in the composites with RCu-Be/Cu of 7.0 reaches saturation at the initial stage of plastic deformation and then decreases rapidly. The HDI hardening in the composites with RCu-Be/Cu of 5.0 plays a dominant role during the strain hardening process and provides the extra strain hardening effect for the composites within a large strain range.
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