Influence of aging treatment on mechanical properties was investigated in the CNT/Al–Cu–Mg rolled composites. The tensile strength of composites was strongly dependent on the aging annealing treatment, and stronger aging effect was observed in the composites compared with matrix alloy. The ultimate tensile strength was highest in the CNT/Al–Cu–Mg composites with peak-aging treatment, however, it sharply decreased when samples were over-aged. In addition to the load transfer and grain refinement, CNTs addition introduced strong back stress, and the aging nanoprecipitation strengthening promoted the strain hardening capability, which both significantly improved the ultimate tensile strength of composites.

中文翻译：

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时效处理对 CNT/Al-Cu-Mg 轧制复合材料力学性能的影响

研究了时效处理对 CNT/Al-Cu-Mg 轧制复合材料的力学性能的影响。复合材料的抗拉强度强烈依赖于时效退火处理，与基体合金相比，复合材料的时效效应更强。经峰值时效处理的 CNT/Al-Cu-Mg 复合材料的极限拉伸强度最高，然而，当样品过时效时，极限拉伸强度急剧下降。除了载荷传递和晶粒细化外，CNTs的添加引入了强背应力，时效纳米析出强化促进了应变硬化能力，均显着提高了复合材料的极限抗拉强度。