中国物理B ›› 2016, Vol. 25 ›› Issue (11): 113101-113101.doi: 10.1088/1674-1056/25/11/113101

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Theoretics-directed effect of copper or aluminum content on the ductility characteristics of Al-based (Al3Ti,AlTi,AlCu,AlTiCu2) intermetallic compounds

Yong Li(李勇), Xiao-Juan Ma(马小娟), Qi-Jun Liu(刘其军), Ge-Xing Kong(孔歌星), Hai-Xia Ma(马海霞), Wen-Peng Wang(王文鹏), Yi-Gao Wang(汪贻高), Zhen Jiao(焦振), Fu-Sheng Liu(刘福生), Zheng-Tang Liu(刘正堂)   

  1. 1 Key Laboratory of Advanced Technologies of Materials of Ministry of Education of China, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
    2 Sichuan Provincial Key Laboratory(for Universities) of High Pressure Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
    3 State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2016-06-08 修回日期:2016-07-03 出版日期:2016-11-05 发布日期:2016-11-05
  • 通讯作者: Xiao-Juan Ma E-mail:mxj_swjtu@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 41674088, 11574254, 11272296, and 11547311), the National Basic Research Program of China (Grant No. 2011CB808201), the Fundamental Research Fund for the Central Universities, China (Grant Nos. 2682014ZT30 and 2682014ZT31), and the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University, China (Grant No. SKLSP201511).

Theoretics-directed effect of copper or aluminum content on the ductility characteristics of Al-based (Al3Ti,AlTi,AlCu,AlTiCu2) intermetallic compounds

Yong Li(李勇)1,2, Xiao-Juan Ma(马小娟)1,2, Qi-Jun Liu(刘其军)1,2, Ge-Xing Kong(孔歌星)1,2, Hai-Xia Ma(马海霞)1,2, Wen-Peng Wang(王文鹏)1,2, Yi-Gao Wang(汪贻高)1,2, Zhen Jiao(焦振)1,2, Fu-Sheng Liu(刘福生)1,2, Zheng-Tang Liu(刘正堂)3   

  1. 1 Key Laboratory of Advanced Technologies of Materials of Ministry of Education of China, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
    2 Sichuan Provincial Key Laboratory(for Universities) of High Pressure Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
    3 State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2016-06-08 Revised:2016-07-03 Online:2016-11-05 Published:2016-11-05
  • Contact: Xiao-Juan Ma E-mail:mxj_swjtu@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 41674088, 11574254, 11272296, and 11547311), the National Basic Research Program of China (Grant No. 2011CB808201), the Fundamental Research Fund for the Central Universities, China (Grant Nos. 2682014ZT30 and 2682014ZT31), and the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University, China (Grant No. SKLSP201511).

摘要: First-principle simulations have been applied to investigate the effect of copper (Cu) or aluminum (Al) content on the ductility of Al3Ti, AlTi, AlCu, and AlTiCu2 alloys. The mechanical stable and elastic properties of Al-based intermetallic compounds are researched by density functional theory with the generalized gradient approximation (DFT-GGA). The calculated lattice constants are in conformity with the previous experimental and theoretical data. The deduced elastic constants show that the investigated Al3Ti, AlTi, AlCu, and AlTiCu2 structures are mechanically stable. Shear modulus, Young's modulus, Poisson's ratio, and the ratio B/G have also been figured out by using reckoned elastic constants. A further analysis of Young's modulus and Poisson's ratio reveals that the third added element copper content has significant effects on the Al-Ti-based ICs ductile character.

关键词: intermetallics, brittleness and ductility, elastic properties, ab-initiocalculations

Abstract: First-principle simulations have been applied to investigate the effect of copper (Cu) or aluminum (Al) content on the ductility of Al3Ti, AlTi, AlCu, and AlTiCu2 alloys. The mechanical stable and elastic properties of Al-based intermetallic compounds are researched by density functional theory with the generalized gradient approximation (DFT-GGA). The calculated lattice constants are in conformity with the previous experimental and theoretical data. The deduced elastic constants show that the investigated Al3Ti, AlTi, AlCu, and AlTiCu2 structures are mechanically stable. Shear modulus, Young's modulus, Poisson's ratio, and the ratio B/G have also been figured out by using reckoned elastic constants. A further analysis of Young's modulus and Poisson's ratio reveals that the third added element copper content has significant effects on the Al-Ti-based ICs ductile character.

Key words: intermetallics, brittleness and ductility, elastic properties, ab-initiocalculations

中图分类号:  (Ab initio calculations)

  • 31.15.A-
46.25.-y (Static elasticity) 47.54.Jk (Materials science applications)