PowerPoint Multiple Quality Characteristics Optimization of Welding Inconel 718 alloy Using Taguchi methods coupled with Principal Component Analysis and Fuzzy logic theory

(A)CO2(B)(C)(D) (E)(F)(G)(H)
A1(1.8)B3(CO21400W)C1(250mm/min)D2(4L/min)E3(62A)F2(4L/min)G3(16L/min)H1(0.2L/min)
Inconel718

*
yi
Principal component Analysis (PCA) for MPCI optimizatuon
Control factors: A:Tip() B:CO2 Laser power C:Welding velocity D:Side gas flow E:Plasma base current F:Back gas flow G:Shielding gas H:Center gas
CO2 Laser+Plasma welding system
Fuzzy logic rule for multi performance characteristics optimization
Output [Butt weldments]
Input [butt metals]
*
Tensile strength
Bendin gstrength
Factors
MPCIopt = A1+B3+C1+D2+E3+F2+G3+H1-7 MPCIaverage
= 0.6394+0.6438 +0.6697+0.6377+0.6938+0.6130+0.6212+0.6230-7×0.6078
=0.8868
MPCIinitial = A1+B1+C1+D1+E1+F1+G1+H1-7 MPCIaverage
= 0.6394+0.5555+0.6697+0.5813+0.5543+0.6033+0.6207+0.6230-7×0.6078
= 0.5924
MPCI0.2943



0.8868
0.920

0.5924
0.596

0.2943
0.324
MPCI confirmed
Inconel 718B(CO2)C()E()