The evaluation of the effects of control factors on surface roughness in the drilling of Waspaloy superalloy

MOTORCU A. R., KUŞ A., Durgun I.

MEASUREMENT, vol.58, pp.394-408, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58
  • Publication Date: 2014
  • Doi Number: 10.1016/j.measurement.2014.09.012
  • Journal Name: MEASUREMENT
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.394-408
  • Keywords: Waspaloy, Drilling, Taguchi method (TM), Surface roughness, Chip formation, Tool wear, HOLE QUALITY, PROCESS PARAMETERS, STAINLESS-STEEL, CHIP FORMATION, TOOL WEAR, MACHINABILITY, INCONEL-718, PERFORMANCE, ALLOYS, INTEGRITY
  • Bursa Uludag University Affiliated: Yes

Abstract

In this study, the effects of cutting tool type (Ct), cutting speed (Vc), feed rate (f) and drill bit angle (A) on the average surface roughness (Ra) were investigated in the drilling of Waspaloy superalloy with coated and uncoated solid carbide drills. Experimental studies were performed in the orthogonal array of L18 (2(1) x 3(3)) by using Taguchi method. A second order predictive equation was developed with Linear Regression Analysis and coefficient of correlation for Ra calculated as R-2 = 96.9%. The most effective parameters on Ra were determined as A, f, Vc and Ct with 49.44%, 15.0%, 14.45% and 13.47% contribution ratios, respectively. Ra surface roughness values increased with the increasing tool wear. In this study, the chip formation and tool wear were also evaluated. Three types chip formation such as spiral chip, string chip and short chip were observed in the drilling of Waspaloy with solid carbide drills. (C) 2014 Elsevier Ltd. All rights reserved.