Effect of cast process and microalloying on the fracture toughness of Zr-based bulk amorphous alloys

Y. S. Chang, K. T. Hsu, J. B. Li, P. H. Tsai, J. S.C. Jang, J. C. Huang

研究成果: 雜誌貢獻期刊論文同行評審

10 引文 斯高帕斯(Scopus)

摘要

In order to clarify the effects of tilt- or suction-cast processing and microalloying of minor Si on the three-point bending fracture toughness of the Zr-based bulk metallic glasses (BMGs), the tilt-cast and suction-cast Zr53-based and Zr48-based BMGs with and without Si were studied. The results revealed that the tilt-cast specimens present much better fracture toughness than the suction-cast counterparts as a result of their lower degrees of residual porosity. In addition, the microalloying of Si to 0.75 at.% in these BMGs would impose negative effects on their fracture toughness. The highest fracture toughness of 120 MPa m was achieved for the tilt-cast Zr53Cu 30Ni9Al8. Moreover, the morphology of fracture surface, the calculated fracture energy, and the Poisson's ratio show the similar trend to prove that the tilt-cast Zr-53 BMG without Si possesses the best fracture toughness among these BMGs in this study.

原文???core.languages.en_GB???
頁(從 - 到)87-93
頁數7
期刊Journal of Alloys and Compounds
614
DOIs
出版狀態已出版 - 25 11月 2014

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