SEDL / STP / STP1561-EB / STP20120017

Burning of CP Titanium (Grade 2) in Oxygen-Enriched Atmospheres

Stoltzfus, Joel M.
Oxygen Group Project Leader, Materials and Components Laboratories Office, NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM

Jeffers, Nathan
Oxygen Group Project Leader, Materials and Components Laboratories Office, NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM

Gallus, Timothy D.
Oxygen Group Project Leader, Materials and Components Laboratories Office, NASA Johnson Space Center White Sands Test Facility, Las Cruces, NM

Pages: 16    Published: Nov 2012

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Abstract

The flammability in oxygen-enriched atmospheres of commercially pure (CP) titanium rods as a function of diameter and test gas pressure was determined. Test samples of varying diameters were ignited at the bottom and burned upward in 70 % O²/balance N² and in 99.5+ % O² at various pressures. The burning rate of each ignited sample was determined by observing the apparent regression rate of the melting interface (RRMI) of the burning samples. The burning rate or RRMI increased with decreasing test sample diameter and with increasing test gas pressure and oxygen concentration. The oxygen concentration had a much more marked affect on the burning rate than oxygen pressure.