After sinter + forging, certain amount of the specimens were machined for the tailored behaviour at high cutting speed with
low cutting force to eliminate certain damage on the surface of the specimens such as work hardening or the damage on the
cutting tool (point angle of cutting tool, θ ¼ 130
, feeding rate: 165 mm/min a cutting speed rate: 10 m/min) [6, 12, 13].
5.3 Results and Discussion
5.3.1 Microstructure and Mapping Analyses and Machinability of the Compositions Produced
by “Sinter + Forging Process”
Figure 5.1 present the 3P-Bending set up installed on the Zwick mechanical test system to conduct the 3P-Bending tests at the
strain rate of 1 mm/min. Here, typical sinter-forged specimen at the initial form before the cutting with water jet to prepare the
specimens according to the standard of ASTM 790 and the bended specimen after the plastic deformation. It seems that this
composite is very suitable for the tailoring behaviour with hyper elasticity capacity. Figure 5.2 indicate the chip morphology
of the Cu-Zn-Al-1X composite obtained during the manufacturing of the different shape of the pieces to be target in the
application of the connector-coupling and/or actuator, etc. It seems that very ductile chip form with easily machining
behaviour of this composite and evidently very suitable tailoring behaviour for new type of shape memory applications.
Cutting parameters: point angle of cutting tool, θ ¼ 130
, feeding rate: 165 mm/min a cutting rate: 10 m/min)
Figure 5.3 present general microstructure taken from a sintered forging specimen and “EDS” chemical analyses obtained
on the SEM with Back Scattered option for the composite called here “Zn-Cu-Al-1X”. Sintered-forging process has been
carried out at the 650
C followed slow quenching and final cooling operation. It seems a sound a tough microstructure under
this manufacturing process economic and easy manufacturing of the engineering pieces. In fact, the strength behaviour can be
increased with the addition of the copper in this composite without disturbing the super plasticity.
Fig. 5.1 Schematic presentation of the 3P-Bending test (ASTM790) and experimental set up with microstructure of the sandwich composite
structure before and after the bending test
5 Tailored Behaviour of Scrap Copper Matrix Composites Reinforced. . .
29
low cutting force to eliminate certain damage on the surface of the specimens such as work hardening or the damage on the
cutting tool (point angle of cutting tool, θ ¼ 130
, feeding rate: 165 mm/min a cutting speed rate: 10 m/min) [6, 12, 13].
5.3 Results and Discussion
5.3.1 Microstructure and Mapping Analyses and Machinability of the Compositions Produced
by “Sinter + Forging Process”
Figure 5.1 present the 3P-Bending set up installed on the Zwick mechanical test system to conduct the 3P-Bending tests at the
strain rate of 1 mm/min. Here, typical sinter-forged specimen at the initial form before the cutting with water jet to prepare the
specimens according to the standard of ASTM 790 and the bended specimen after the plastic deformation. It seems that this
composite is very suitable for the tailoring behaviour with hyper elasticity capacity. Figure 5.2 indicate the chip morphology
of the Cu-Zn-Al-1X composite obtained during the manufacturing of the different shape of the pieces to be target in the
application of the connector-coupling and/or actuator, etc. It seems that very ductile chip form with easily machining
behaviour of this composite and evidently very suitable tailoring behaviour for new type of shape memory applications.
Cutting parameters: point angle of cutting tool, θ ¼ 130
, feeding rate: 165 mm/min a cutting rate: 10 m/min)
Figure 5.3 present general microstructure taken from a sintered forging specimen and “EDS” chemical analyses obtained
on the SEM with Back Scattered option for the composite called here “Zn-Cu-Al-1X”. Sintered-forging process has been
carried out at the 650
C followed slow quenching and final cooling operation. It seems a sound a tough microstructure under
this manufacturing process economic and easy manufacturing of the engineering pieces. In fact, the strength behaviour can be
increased with the addition of the copper in this composite without disturbing the super plasticity.
Fig. 5.1 Schematic presentation of the 3P-Bending test (ASTM790) and experimental set up with microstructure of the sandwich composite
structure before and after the bending test
5 Tailored Behaviour of Scrap Copper Matrix Composites Reinforced. . .
29