J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (8): 756-760.

• Regular Papers • Previous Articles     Next Articles

Microstructure Evolution of Zr50Cu18Ni17Al10Ti5 Bulk Metallic Glass during Cold-rolling

Honghong Yan, Yong Hu, Zhijie Yan, Xiaohua Zheng, Yongtang Li   

  1. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
  • Received:2011-07-19 Revised:2011-10-05 Online:2012-08-31 Published:2012-08-30
  • Contact: Yong Hu
  • Supported by:

    the National Natural Science Foundation of China (No. 50804032), the Natural Science Foundation of Shanxi Province, China (Nos. 2011021020-1 and 2012021018-3) and the Postgraduate Technology Innovation Project of Taiyuan University of Science and Technology, China (No. 20111002)

Abstract:

Zr50Cu18Ni17Al10Ti5 bulk metallic glass has been rolled at room temperature up to 95% in thickness reduction, and the dependence of microstructure on the strain was investigated. With increasing thickness reduction, the full width at half maximum (FWHM) and crystallization enthalpy decrease gradually till 80%, and then increase evidently at 95%. It is revealed that the reversible transition between the ordered and disordered atomic configurations was found in the metallic glass as the deformation proceeds, which is further verified by the high-resolution transmission electron microscopy images. The final microstructure in metallic glass during cold-rolling is the net result of two competing processes between shear-induced disordering and diffusion
controlled reordering.

Key words: Metallic glasses, Cold-rolling, Microstructure