The `natural' metal–matrix composite formation by thermo-mechanical treatments

Effect of Thermomechanical Working on the Microstructure and Mechanical Properties of Hot Pressed Superalloy Inconel 718

“…Additionally the microstructure was examined using standard optical and electron microscopy techniques, SEM (Hitachi S-3400) and TEM (STEM) -(Jeol 2100). The present research work contributes some new information about the precipitation process which occurs in solution treated nickel based superalloy deformed at elevated temperatures and was inspired by the studies of previous researches performed on Cu-Ni-Si-Cr-Mg, Cu-Ti and low carbon steel [1][2][3][4][5][6]14,20]. The strain/precipitation interaction have revealed much more complex structural processes than those reported for HSLA steels [4].…”

“…A general conclusion follows from the consideration of the role of shear banding in the material structure -this particular mode of deformation may be used as a method of microstructure control. Oriented arrangement of the secondary phases may significantly reinforce the strength of a material without deterioration of the material ductility, as it was observed in case of Fe-Ni [6] and Cu alloys [1][2][3]. It is interesting to consider a condition when shear bands are formed in deformed material.…”

“…The contribution of flow localization to the strain hardening or flow softening and the flow stress-strain behavior during hot deformation of precipitation hardenable alloys is still a subject of extensive research. The interaction between the flow localization and dynamic precipitation process has been the subject of very limited research [1][2][3][4][5][6][7][8][9][10][11][12][13]. For instance, the retardation of dynamic recrystallization due to dynamic precipitation was tested for HSLA steels [4][5][6][7].…”

The Influence of Hot-Deformation Parameters on the Mechanical Properties and Precipitation Process in Nickel Based Superalloy

“…The interaction between the flow localization and dynamic precipitation process has been the subject of very limited research [1][2][3][4][5][6][7][8][9][10][11][12][13]. For instance, the retardation of dynamic recrystallization due to dynamic precipitation was tested for HSLA steels [4][5][6][7].…”

“…The flow stress value is strongly affected by temperature, deformation value, strain rate and the history of the course of deformation process [5]. To describe the relationship between deformation parameters and stress, the following mathematical formula can be used [6][7][8][9][10]:…”