J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (5): 489-492.DOI: 10.1016/j.jmst.2014.07.022

Special Issue: 铝合金专辑

• Orginal Article • Previous Articles     Next Articles

Devitrification-induced an Ultrahigh Strength Al-based Composite Maintaining Ductility

Dong Kan1, Xiaopeng Li2, Baijun Yang1, Hongwang Yang3, Jianqiang Wang1, *   

  1. 1 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 2 School of Mechanical and Chemical Engineering, M050, The University of Western Australia, 35 Stirling Highway, Grawley, Perth, WA 6009, Australia; 3 School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
  • Received:2014-04-24 Online:2015-05-20 Published:2015-07-23
  • Contact: Corresponding author. Prof.; Tel./Fax: +86 24 2397 1902. E-mail address: jqwang@imr.ac.cn (J. Wang).
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 51131006, 51071151). We appreciate the valuable discussion with Dr. F.K. Yan and essential experiment operating with Dr. S. Gao and Dr. X. Chen.

Abstract: A new Al-based composite consisting of submicron-sized α-Al matrix embedded with precipitated intermetallic phases was developed by controlling the devitrification process of an Al-Ni-Y-Co-La amorphous alloy. Such a homogeneous composite structure presented an ultrahigh strength of about 1.34 GPa and a large compressive plastic strain up to 22%. The unique mechanical properties during compression are mainly attributed to the dislocation slip deformation of ductile α-Al matrix and the shear-induced refinement of strengthening intermetallic phases.

Key words: Al-rich metallic glass, Devitrification, Composite, Mechanical properties