TY - JOUR
T1 - Productivity and workpiece surface integrity when WEDM aerospace alloys using coated wires
AU - Antar, MT
AU - Soo, Sein
AU - Aspinwall, David
AU - Jones, D
AU - Perez, R
PY - 2011/1/1
Y1 - 2011/1/1
N2 - Following a brief review of recent minimum damage EDM pulse generator developments, experimental data is presented for workpiece productivity & integrity when WEDM Udimet 720 nickel based superalloy and Ti-6Al-2Sn-4Zr-6Mo titanium alloy, using Cu core coated wires (ZnCu50 and Zn rich brass). Up to a 70% increase in productivity was possible compared to when using uncoated brass wires with the same operating parameters. Surfaces measuring ∼ 0.6 μm Ra, with near neutral residual stresses and almost zero recast were produced following two trim passes. Cross-sectional micrographs of specimens following rough machining (∼180mm2/min) showed the recast to be < 7 μm thick (up to 11 μm for uncoated wire), with comparable results for both alloys. Surface cracking, when evident, was restricted to within the recast layer.
AB - Following a brief review of recent minimum damage EDM pulse generator developments, experimental data is presented for workpiece productivity & integrity when WEDM Udimet 720 nickel based superalloy and Ti-6Al-2Sn-4Zr-6Mo titanium alloy, using Cu core coated wires (ZnCu50 and Zn rich brass). Up to a 70% increase in productivity was possible compared to when using uncoated brass wires with the same operating parameters. Surfaces measuring ∼ 0.6 μm Ra, with near neutral residual stresses and almost zero recast were produced following two trim passes. Cross-sectional micrographs of specimens following rough machining (∼180mm2/min) showed the recast to be < 7 μm thick (up to 11 μm for uncoated wire), with comparable results for both alloys. Surface cracking, when evident, was restricted to within the recast layer.
U2 - 10.1016/j.proeng.2011.11.071
DO - 10.1016/j.proeng.2011.11.071
M3 - Article
VL - 19
SP - 3
EP - 8
JO - Procedia Engineering
JF - Procedia Engineering
ER -