Figure 9From: Evaluation of Surface Roughness of Aluminum Alloy in Burnishing Process Based on Chaos TheoryBurnishing friction coefficient power spectra: (a) Test 1, (b) Test 2, (c) Test 3, (d) Test 4, (e) Test 5, (f) Test 6, (g) Test 7, (h) Test 8, (i) Test 9Back to article page