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| Reference : Equilibrium and non Equilibrium study of the Fine Pearlite Formation in two Cast High Sp... |
| Scientific journals : Article | |||
| Engineering, computing & technology : Materials science & engineering | |||
| http://hdl.handle.net/2268/113742 | |||
| Equilibrium and non Equilibrium study of the Fine Pearlite Formation in two Cast High Speed Steels after solidification and thermal treatment | |
| English | |
Tchuindjang, Jérôme Tchoufack  [Université de Liège - ULg > Département d'aérospatiale et mécanique > Science des matériaux métalliques >] | |
| Lecomte-Beckers, Jacqueline [Université de Liège - ULg > Département d'aérospatiale et mécanique > Science des matériaux métalliques >] | |
| 2011 | |
| International Journal of Materials Research | |
| International | |
| 1862-5282 | |
| [en] HSS ; crystallization behaviour ; carbides ; quasi isothermal transformation ; fine pearlite | |
| [en] Two High Speed Steels (HSS) have been studied both having chemical compositions
closed one to another. Both HSS grades exhibited similar matrix/carbides microstructure in the industrial as-cast conditions, except for M7C3 eutectic carbides only observed in one grade and fine pearlite only found in the other grade. Equilibrium diagrams were obtained from Thermodynamical simulations to enhanced predicted phase transformations whereas Differential Thermal Analysis was performed on both alloys in order to determine their crystallization behaviour in non equilibrium conditions. Light microscopy and Electron microscopy associated with microprobe analyses were done to characterize the microstructure of both alloys. Thermal treatments with related bulk hardness assessments were carried out to enhance conditions for pearlite formation at the end of the casting route. In continuous cooling conditions obtained from DTA simulations, the matrix of both as-cast HSS grades is composed of eutectic carbides, martensite and retained austenite, these phases exhibiting similar chemical compositions. The introduction of an intermediate isothermal stage in the solid state within the DTA cooling sequence leads to the formation of a fine pearlite phase mainly located in the vicinity of M2C eutectic carbides on one HSS grade. The origin of this fine pearlite is discussed in this paper. | |
| Researchers ; Professionals ; Students ; General public | |
| http://hdl.handle.net/2268/113742 |
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