Influence of Ultrasonic Burnishing Technique on Surface Quality and Change in the Dimensions of Metal Shafts

Table 3

Surface roughness results.

Material	Premachined surface [µm]	Finished surface [µm]	Difference [µm]	Relative [%]
S355J2	1.7	0.3	1.4	−82.4
	3.5	0.35	3.15	−90.0
	6.2	0.45	5.75	−92.7
34-CrNiMo6	1.7	0.3	1.4	−82.4
	2.6	0.4	2.2	−84.6
	5.6	0.45	5.15	−92.0
Aluminium	1.5	0.2	1.3	−86.7
	3.26	0.3	2.96	−90.8
	5.3	0.45	4.85	−91.5
Average		0.36		−88.1