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- W2061330301 abstract "Abstract Molecular dynamics simulations of he crack-tip f.c.c. → b.c.c. martensitic transformation in Fe-20Ni and Fe-40Ni (at.%) were carried out. Embedded atom method potential functions were used to represent the interaction between the atoms in both crystal structures. The results show that in both alloys the crack-tip stresses are relaxed owing to formation of the b.c.c. phase which is twinned to help accommodate the transformation strain associated with the f.c.c. → b.c.c. transformation. As a result of the transformation, the crack tip becomes blunted which, in turn, enhances the material toughness. To quantify the effect of the crack-tip f.c.c. → b.c.c. transformation on material toughness, components of Eshelby's F conservation integral were evaluated in the two alloys. It was found that the F 1 component of the integral which represents the force acting to propagate the crack tip has become negative owing to the transformation. As a result, crack propagation has ceased. Comparison of the two alloys showed that in Fe-40Ni dislocation emission in addition to the transformation can take place at the crack tip, causing additional crack blunting." @default.
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- W2061330301 date "1995-08-01" @default.
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- W2061330301 title "Molecular dynamics embedded atom method simulations of crack-tip transformation toughening in FeNi austenite" @default.
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- W2061330301 doi "https://doi.org/10.1016/0921-5093(94)09727-5" @default.
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