Misirli, CenkCan, Yilmaz2024-06-122024-06-1220102066-3919https://hdl.handle.net/20.500.14551/2240814th International Conference on Modern Technologies, Quality and Innovation (ModTech 2010) -- MAY 20-22, 2010 -- Slanic Moldova, ROMANIAThis paper overviews the metal forming process which is called forging-extrusion process. The aim of this process is manufactured of near net shape of many produce. In this study, two different shaped upper dies were used. A199.7 aluminum alloy was used for experiments. Aluminum billets which having same initial heights have been extruded with the same strokes. The forging loads were measured different deformation rate. Some of aluminum billets were lubricated and formed. Lubricated specimens were compared with the other specimens. The effect of metal forming process on the hardness distribution along the radial direction was investigated both of different geometries and lubricated conditions. In addition, the microstructures were investigated for clover shaped samples and rectangular shaped samples using transmission electron microscopy (TEM). It was found that both clover shaped samples and rectangular shaped samples have similar mechanical properties. The corresponding microstructure consisted of a mixture of elongated subgrains with dimensions similar to those observed in the initial billet. It is suggested that there is no considerable differences between two different geometries in terms of microstructure and lubrication.eninfo:eu-repo/semantics/closedAccessMetal FormingExtrusionHardnessA199.7CloverTransmission Electron MicroscopyConference Object399402N/AWOS:000282604000097