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

Table 4

Out-of-roundness results.

Material	Premachined surface [µm]	Finished surface [µm]	Difference [µm]	Relative [%]
Aluminium	7.40	7.37	0.03	−0.45
	20.08	7.32	12.76	−63.55
	22.93	7.83	15.1	−65.83
S355J2	11.03	5.37	5.66	−51.32
	19.95	7.65	12.30	−61.65
	23.23	8.43	14.80	−63.96
34-CrNiMo6	12.33	7.98	4.35	−35.23
	9.90	7.42	2.48	−25.08
	20.18	5.22	14.96	−74.14
Average		7.18