Effect of heat treatment on the mechanical properties of FeCoZrWB bulk metallic glass

Pingjun Tao; Yuanzheng Yang; Guangji Guan; Deqiang Zhao; Guangyi Guan; Zhiwei Xie

doi:10.1007/s11595-012-0502-7

Journal of Wuhan University of Technology Materials Science Edition ›› 2012, Vol. 27 ›› Issue (3) : 547 -549. DOI: 10.1007/s11595-012-0502-7

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Effect of heat treatment on the mechanical properties of FeCoZrWB bulk metallic glass

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Abstract

A Fe₆₁Co₁₀Zr₅W₄B₂₀ bulk metallic glass (BMG) with a diameter of 2 mm was prepared by using copper mould suction casting. The X-ray diffraction (XRD), differential scanning calorimetry (DSC), micro-hardness and compression tests were adopted to investigate the structure, thermal stability, especially, the effect of heat treatment on the micro-hardness and compression strength of this BMG. The BMG exhibits micro-hardness of about 1 207 Hv and compression fracture strength of about 1 707.6 MPa. After being annealed below the onset of crystallization temperature, the micro-hardness almost keeps constant. But after being annealed above the peak of crystallization temperature, the micro-hardness increases firstly and then declines gradually with the elongation of annealing time. However, annealed for the same period of time, the micro-hardness will increase with the rise of annealing temperature, while the compression fracture strength will apparently decrease.

Keywords

bulk metallic glass / heat treatment / micro-hardness / compression strength

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Pingjun Tao, Yuanzheng Yang, Guangji Guan, Deqiang Zhao, Guangyi Guan, Zhiwei Xie. Effect of heat treatment on the mechanical properties of FeCoZrWB bulk metallic glass. Journal of Wuhan University of Technology Materials Science Edition, 2012, 27(3): 547-549 DOI:10.1007/s11595-012-0502-7

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