Experimental results are detailed when creep feed grinding (CFG) a gamma titanium aluminide intermetallic alloy (gamma-TiAl) Ti-45Al-8Nb-0.2C with SiC abrasives. When using low porosity wheels at a low wheel speed of 15 m/s and a material removal rate of 62.5 mm/s, G-ratios of about of 15 were produced with workpiece surfaces free of burn. At higher wheel speeds >25 m/s, cracks up to 1 mm deep were evident with extreme workpiece surface burn. By increasing the wheel porosity, specific power, cutting forces, workpiece surface burn and cracking were all reduced however, G-ratio was also reduced to about of 4 with heavy profile wear. Operation at 15 m/s with increasing feed rate and depth of cut reduced G-ratio still further to <1, whilst increasing power and forces by up to 250 and 300%, respectively. Surface integrity evaluation showed that it was possible to produce crack free surfaces with defects <10 micrometer from the workpiece surface at low depths of cut, irrespective of feed rate.


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    Title :

    Creep feed grinding of a gamma titanium aluminide intermetallic alloy using SiC abrasives


    Contributors:
    Hood, R. (author) / Aspinwall, D.K. (author) / Voice, W. (author)


    Publication date :

    2007


    Size :

    5 Seiten, 16 Bilder, 10 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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