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| TEM STUDY OF MECHANISM OF STRAIN-AGE HARDENING OF INITIALLY DISORDERED (Co, Fe)_3V ALLOY |
| LIN Yijian (Shanghai Iron and Steel Research Institute); S.GIALANELLA (University of Trento; Italy); R. W. CAHN (University of Cambridge; U.K.) |
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Cite this article:
LIN Yijian (Shanghai Iron and Steel Research Institute); S.GIALANELLA (University of Trento; Italy); R. W. CAHN (University of Cambridge; U.K.). TEM STUDY OF MECHANISM OF STRAIN-AGE HARDENING OF INITIALLY DISORDERED (Co, Fe)_3V ALLOY. Acta Metall Sin, 1992, 28(11): 40-46.
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Abstract TEM study was made to explore the mechanism of the strain-age hardening of initially-disordered'(Co_(78)Fe_(22))_3V, which was found to be attributed to the formation of a special dislocation-stacking fault configuration in company with disorder-order transformation — dislocations extended to stacking faults on {111} planes and got connected with each other through partial dislocation reaction at intersections of {111} planes, leading to dense networks with cells bounded by stacking fault tetrahedrons. The results also indicated that ordered (Co_(78)Fe_(22))_3V has very low stacking fault energy on {111} planes and relative high and isotropic antiphase boundary energy, which implies that it is most likely to be Lomer-Cottrell locks, not Kear-Wilsdof locks, that are responsible for the high strength at high temperatures of this alloy.
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Received: 18 November 1992
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5 Liu C T. Int Metall Rey. 1984; 29: 168 |
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