Cyclic Fatigue Fracture of Zr55Al10Ni5Cu30 Bulk Amorphous Alloy with Quenched-in Crystallites

材料科学技术（英文）, 2003, 19(1): 13-15.

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1.Shenyang National Lab. for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

2.Shenyang National Lab. for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

3.Shenyang National Lab. for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

4.Shenyang National Lab. for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

5.Shenyang National Lab. for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

基金项目: This work was supported by the National Key Project for BasicResearch under(G2000067201) National DevelopmentProject for High Technology under(2001AA331010)

Cyclic Fatigue Fracture of Zr55Al10Ni5Cu30 Bulk Amorphous Alloy with Quenched-in Crystallites

Keywords： Bulk amorphous alloy

The effects of quenched-in crystallites on the fracture of bulk amorphous alloys under cyclic loading condition wereinvestigated in this paper. For the fully amorphous alloy and specimen with fine crystallites the fatigue crack initiationoccurred on the surface. For the specimen with larger crystallites the crack originated from a big broken crystallitenear the surface. The average striation spacing on amorphous area is much larger than that on the crystallite.Crack initiation occurred at the crystallites is due to that the brittle crystallites broke easily under cyclic deformationcondition. The fine crystallites seemed to be protruded from the amorphous matrix and some bulges appeared onthe surface of specimen with fine crystallites under cyclic loading.

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Cyclic Fatigue Fracture of Zr55Al10Ni5Cu30 Bulk Amorphous Alloy with Quenched-in Crystallites

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