Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11003039 | Journal of Loss Prevention in the Process Industries | 2018 | 8 Pages |
Abstract
The Ti6Al4V powder alloy combustion is studied in order to define dust explosion parameters for industrial safety and combustion mechanism for scientific analysis. No results exist in literature of dust explosion concerning titanium alloy like Ti6Al4V. Three different powders with different average particles size (around 13â¯Î¼m, 26â¯Î¼m and 55â¯Î¼m) were studied. The interest comes from its wide use in metallurgy, especially for aeronautical, dental and defense applications. This paper reports the minimum ignition energy (MIE) of the alloy powders as a function of the concentrations. Hartmann tube apparatus was used in this way. Results can be synthetized as: 3.5â¯mJ for 13â¯Î¼m, 4â¯mJ for 26â¯Î¼m and 357â¯mJ for 55â¯Î¼m particle size. When comparing the values of MIE for pure titanium (Ti) and pure aluminum (Al) powders, the alloy sensibility is near pure Ti. Severity parameters and temperature measured by IR pyrometry were investigated during 20â¯L spherical explosion vessel tests. Results shown 6â¯bar overpressure and rate of pressure rise at 546 and 474â¯bar/s for 13 and 26â¯Î¼m respectively. In case of the powders average diameter around 55â¯Î¼m, ignition occurred in only one condition: 1500â¯g/m3. Temperatures were measured during explosion following two different scales: versus time and versus concentration.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
M. Millogo, S. Bernard, P. Gillard, F. Frascati,