Compression behavior of Mg-Cu-Gd bulk metallic glasses with various specimen height to diameter ratios

H. M. Chen, Y. C. Chang, T. H. Hung, X. H. Du, J. C. Huang, J. S.C. Jang, P. K. Liaw

研究成果: 雜誌貢獻期刊論文同行評審

12 引文 斯高帕斯(Scopus)

摘要

The mechanical behavior of the Mg65Cu25Gd 10 bulk metallic glasses (BMGs) in term of compression testing is reported in this study. Room-temperature compression tests are conducted on specimens with various height to diameter ratios (h/d) from 2 : 1, 1 : 1, 1 : 2, to 1 : 4. The failure strength, deformation strain, and the fracture surface morphologies are seen to vary systematically in accordance with the specimen h/d ratio. For specimens with h/d of 2 : 1 or 1 : 1, the compression response is similar to those in most reports. In contrast, for specimens with lower h/d ratios, especially at h/d = 1 : 4 (or 0.25), the shear band propagation appears to be constrained, resulting in the enhanced ductility. It suggests that different deformation mechanisms are operative for specimens with different h/d ratios. The possible deformation mechanisms in specimens of different geometries are discussed.

原文???core.languages.en_GB???
頁(從 - 到)1802-1805
頁數4
期刊Materials Transactions
48
發行號7
DOIs
出版狀態已出版 - 7月 2007

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