EXPERIMENTAL INVESTIGATION OF CUTTING FORCES GENERATED DURING TURNING OF QUENCHED AND UNQUENCHED CU-AL-BE ALLOYS
Résumé
This work aims to study the machining cutting forces acquired during dry turning with different cutting parameters in quenched and not quenched sample. Three workpiece materials are used in this study:Cu-11.8%Al-0.60%Be, Cu-11.8%Al-0.55%Be and Cu-11.8%Al-0.55%Be-0.50%Nb-0.27%Ni. The heat treatment was carried out in orderto obtain samples with DO3 and/or martensitic structures. The cutting forces were measured with a 3-component dynamometer and it was extracted ten sequential revolutions for each tested sample. For each alloy tested, three replicates were performed with quenched workpieces and three samples without heat treatment. It was found out that the resultant forces were higher in tempered alloys due to the presence of the shape memory effect. Among these, the resulting forces were higher for samples with lower percentage of Be. However, for the additional Nb alloys were obtained the lower resultant forces.
Domaines
Mécanique [physics.med-ph]
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