中国物理B ›› 2023, Vol. 32 ›› Issue (6): 66201-066201.doi: 10.1088/1674-1056/acb48f

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Layer thickness dependent plastic deformation mechanism in Ti/TiCu dual-phase nano-laminates

Minrong An(安敏荣)1, Yuefeng Lei(雷岳峰)3, Mengjia Su(宿梦嘉)2, Lanting Liu(刘兰亭)2, Qiong Deng(邓琼)2,†, Haiyang Song(宋海洋)1,‡, Yu Shang(尚玉)1, and Chen Wang(王晨)4   

  1. 1 College of New Energy, Xi'an Shiyou University, Xi'an 710065, China;
    2 Fundamental Science on Aircraft Structural Mechanics and Strength Laboratory, Northwestern Polytechnical University, Xi'an 710072, China;
    3 School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
    4 College of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China
  • 收稿日期:2022-09-08 修回日期:2023-01-15 接受日期:2023-01-19 出版日期:2023-05-17 发布日期:2023-05-24
  • 通讯作者: Qiong Deng, Haiyang Song E-mail:dengqiong24@nwpu.edu.cn;hysong@xsyu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51902254 and 12072286), and the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2021JZ-53 and 2018JQ5108), and the Scientific Research Program Funded by Shaanxi Provincial Education Department, China (Grant No. 20JK0845).

Layer thickness dependent plastic deformation mechanism in Ti/TiCu dual-phase nano-laminates

Minrong An(安敏荣)1, Yuefeng Lei(雷岳峰)3, Mengjia Su(宿梦嘉)2, Lanting Liu(刘兰亭)2, Qiong Deng(邓琼)2,†, Haiyang Song(宋海洋)1,‡, Yu Shang(尚玉)1, and Chen Wang(王晨)4   

  1. 1 College of New Energy, Xi'an Shiyou University, Xi'an 710065, China;
    2 Fundamental Science on Aircraft Structural Mechanics and Strength Laboratory, Northwestern Polytechnical University, Xi'an 710072, China;
    3 School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
    4 College of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China
  • Received:2022-09-08 Revised:2023-01-15 Accepted:2023-01-19 Online:2023-05-17 Published:2023-05-24
  • Contact: Qiong Deng, Haiyang Song E-mail:dengqiong24@nwpu.edu.cn;hysong@xsyu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51902254 and 12072286), and the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2021JZ-53 and 2018JQ5108), and the Scientific Research Program Funded by Shaanxi Provincial Education Department, China (Grant No. 20JK0845).

摘要: Crystalline/amorphous nanolaminate is an effective strategy to improve the mechanical properties of metallic materials, but the underlying deformation mechanism is still under the way of exploring. Here, the mechanical properties and plastic deformation mechanism of Ti/TiCu dual-phase nanolaminates (DPNLs) with different layer thicknesses are investigated using molecular dynamics simulations. The results indicate that the influence of the layer thickness on the plastic deformation mechanism in crystalline layer is negligible, while it affects the plastic deformation mechanism of amorphous layers distinctly. The crystallization of amorphous TiCu is exhibited in amorphous parts of the Ti/TiCu DPNLs, which is inversely proportional to the layer thickness. It is observed that the crystallization of the amorphous TiCu is a process driven by stress and heat. Young's moduli for the Ti/TiCu DPNLs are higher than those of composite material due to the amorphous/crystalline interfaces. Furthermore, the main plastic deformation mechanism in crystalline part: grain reorientation, transformation from hexagonal-close-packed-Ti to face-centered cubic-Ti and body-centered cubic-Ti, has also been displayed in the present work. The results may provide a guideline for design of high-performance Ti and its alloy.

关键词: dual-phase nanolaminate, molecular dynamics simulation, deformation mechanism, crystallization

Abstract: Crystalline/amorphous nanolaminate is an effective strategy to improve the mechanical properties of metallic materials, but the underlying deformation mechanism is still under the way of exploring. Here, the mechanical properties and plastic deformation mechanism of Ti/TiCu dual-phase nanolaminates (DPNLs) with different layer thicknesses are investigated using molecular dynamics simulations. The results indicate that the influence of the layer thickness on the plastic deformation mechanism in crystalline layer is negligible, while it affects the plastic deformation mechanism of amorphous layers distinctly. The crystallization of amorphous TiCu is exhibited in amorphous parts of the Ti/TiCu DPNLs, which is inversely proportional to the layer thickness. It is observed that the crystallization of the amorphous TiCu is a process driven by stress and heat. Young's moduli for the Ti/TiCu DPNLs are higher than those of composite material due to the amorphous/crystalline interfaces. Furthermore, the main plastic deformation mechanism in crystalline part: grain reorientation, transformation from hexagonal-close-packed-Ti to face-centered cubic-Ti and body-centered cubic-Ti, has also been displayed in the present work. The results may provide a guideline for design of high-performance Ti and its alloy.

Key words: dual-phase nanolaminate, molecular dynamics simulation, deformation mechanism, crystallization

中图分类号:  (Mechanical properties of nanoscale systems)

  • 62.25.-g
31.15.xv (Molecular dynamics and other numerical methods) 61.82.Rx (Nanocrystalline materials)