Experimental Investigation on Mechanical and Turning Behavior of Al 7075/x% wt. TiB₂-1% Gr In Situ Hybrid Composite

Table 3

Experimental values of surface roughness by using 0.4 mm and 0.8 mm nose radius inserts.

Material	Feed (mm/rev)	Depth of cut (mm)	Cutting speed (m/min)	Average surface roughness (, in m)
				0.4 mm nose radius insert	0.8 mm nose radius insert
Al 7075 + 0% TiB2 + 1% Gr	0.1	0.5	180	0.948	0.358
			200	0.810	0.343
			220	0.740	0.319
			240	0.671	0.289
	0.2	1.0	180	2.570	1.310
			200	2.353	1.290
			220	2.289	1.100
			240	2.156	1.039
	0.3	1.5	180	3.754	2.756
			200	3.662	2.711
			220	3.461	2.661
			240	3.111	2.558
Al 7075 + 3% TiB2 + 1% Gr	0.1	0.5	180	0.882	0.507
			200	0.843	0.519
			220	0.736	0.456
			240	0.680	0.416
	0.2	1.0	180	2.134	1.240
			200	1.882	1.211
			220	1.877	1.111
			240	1.836	1.011
	0.3	1.5	180	3.875	2.809
			200	3.575	2.572
			220	3.545	2.473
			240	2.911	2.412
Al 7075 + 3% TiB2	0.1	0.5	180	1.117	0.761
			200	1.081	0.740
			220	1.011	0.685
			240	0.949	0.598
	0.2	1.0	180	2.657	1.318
			200	1.863	1.291
			220	1.751	1.210
			240	1.711	1.171
	0.3	1.5	180	3.692	2.238
			200	3.458	2.195
			220	3.342	2.115
			240	3.128	2.095