Flexural Strength and Weibull Analysis of Bulk Metallic Glasses

Jijun Zhang^1,2，Diana Estévez^1,2，Yuan-Yun Zhao^1,2，Lishan Huo^1,2，Chuntao Chang^1,2，Xinmin Wang^1,2，Run-Wei Li^1,2

1. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences2. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences

摘 要：The flexural strength reliability of bulk metallic glasses（BMGs） plates is analyzed using Weibull statistics.The Weibull modulus（m） and characteristic strength（σ₀） of the Zr₄₈Cu₄₅Al₇ BMG are 34 and 2630 MPa,respectively,which are much higher than the values of fine ceramics（m<30,σ₀< 1600 MPa）.In particular,the m values obtained by flexural strength and compressive strength statistics of the Mg₆₁Cu₂₈Gd₁₁BMG are 5 and 33,respectively,indicating that the m values of BMGs are test method dependent,and only the m values obtained by flexural strength statistics can be used to make a convincible comparison with those of ceramics.

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