Interaction of dislocations with nanoprecipitates of the metastable phase and dispersion strengthening of the Fe-Cu alloy |
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| Authors: | Yu N Gornostyrev I N Kar’kin L E Kar’kina |
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| Institution: | 1.Institute of Metal Physics, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;2.Institute of Quantum Materials Science,Yekaterinburg,Russia |
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| Abstract: | The interaction of dislocations with copper-enriched precipitates in the matrix of body-centered cubic iron has been investigated
by the molecular dynamics method. It has been shown that dislocations stimulate the development of a phase instability of
body-centered cubic copper precipitates in a specific range of their sizes. This process is accompanied by the pinning of
dislocations by precipitates and makes a significant contribution to strengthening. The results obtained provide an adequate
explanation for the observed dependence of the strengthening in the Fe-Cu system on the precipitate size. |
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