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- W617852175 abstract "Hot uniaxial compression tests were performed on a eutectoid steel using a Gleeble- 1500 hot simulation test machine.After austenized at 850℃,the specimens were cooled quickly to temperature between A_1 and A_(r1),and then deformed at various strain rates.With the increase of strain,pearlitic lamellae nucleated and grew in front of the proeutectoid ferrite formed along the grain boundaries of prior austenite.And then,dynamic pearlite transformation became the predominant process of dynamic transformation until the decomposition of austenite completed during deformation. After pearlite formed,there are two spheroidization process for lamellae under further deformation: firstly,The presence of bends and kinks of the lamellae led to the dissolution of lamellae through the Gibbs-Thompson effect,resulting in the coarse particles of cementite formed at the grain boundaries; Secondly,with the dynamic recovery and recystalization of ferrite,the fine carbides reprecipitated in the ferrite.At the same time,the Ostwald ripening made the number of fine particles decreased gradually. The duplex microstructure consisting of sub-micrometer ferrite grains and cementite particles can be obtained under proper deformation conditions." @default.
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- W617852175 date "2007-07-11" @default.
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- W617852175 title "Dynamic Transformation of Undercooling Austenite and Microstructure Refinement in a Eutectoid Steel" @default.
- W617852175 hasPublicationYear "2007" @default.
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