张飞扬,王文焱,谢敬佩,王爱琴,朱晓龙,崔云峰

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:洛阳双瑞万基钛业有限公司

摘要(Abstract)：

采用分子动力学模拟方法研究了Zr含量对Cu/Al层状复合材料拉伸变形行为的影响，使用取代掺杂的方式用Zr取代Cu/Al层状复合材料中的Cu,取代比例分别为0.25%、0.45%、0.65%、0.85%和1.05%。结果表明：随着Zr取代比例的增加，Cu-Zr/Al复合材料的极限拉伸强度和最大拉伸应变呈现波动变化的趋势。当Zr的取代比例为0.85%时，复合材料的极限抗拉强度和最大拉伸应变最大，继续增加Zr的含量则会使极限拉伸强度和最大拉伸应变都减小。随着应变的增加，FCC结构、BCC结构以及HCP结构会发生相互转化，沿Y轴进行拉伸时，初始阶段相结构转变更加明显；随着Zr取代比例的增加，塑性变形过程中复合材料的晶型转变将会推迟进行，Shockley不全位错在塑性变形过程中起主导作用，且沿Y轴拉伸时的位错线长度大于沿Z轴拉伸时的位错线长度，同时由于Zr元素的加入，影响位错的扩散，导致复合材料的位错密度降低，从而提高其强度。

关键词(KeyWords)： Cu-Zr/Al复合材料;分子动力学模拟;拉伸变形机制

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2021YFB3701300)

作者(Author): 张飞扬,王文焱,谢敬佩,王爱琴,朱晓龙,崔云峰

DOI: 10.13289/j.issn.1009-6264.2023-0581

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