Forming abilities of monatomic chains of several fcc and bcc metals in different crystallographic orientations |
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Authors: | D. Liu |
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Affiliation: | Key Laboratory of automobile Materials (Jilin University), Ministry of Education, and Department of Material Science and Engineering, Jilin University, Changchun 130025, China |
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Abstract: | The forming abilities of monatomic chains (MC) of several fcc and bcc metals stretched in three principal crystallographic orientations of [1 1 1], [1 0 0] and [1 1 0] are analyzed in terms of a ratio between Peierls stress of a bulk crystal with dislocations (τp) and theoretical shear stress of a monatomic chain (τm). It is found that the structure and orientation dependent τm/τp values are proportional to the forming abilities of MC while τm/τp is a function of Possion's ratio ν. The above considerations are in agreement with known experimental and simulation results of Au. In addition, Nb as a candidate for MC formation is suggested. |
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Keywords: | 33.15.Fm 62.20.&minus x 62.20.Fe |
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