Published: Jan 2006
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It is believed that most people never intend to become metallurgists involved in materials selection issues for systems involving oxygen-enriched atmospheres. However, oxygen applications involve multiple engineering and scientific disciplines and as a consequence, metallurgists or materials scientists become involved, sometimes as failure analysts. ASTM Committee G-4 was formed in 1975. Its first standard was G-63, dealing with nonmetallic materials. In its first symposium conducted in 1982, this committee documented its intention to develop selection guidelines for metals. However, test standards for metals still remained in the future. It is the purpose of this paper to review materials testing techniques and criteria for engineering alloys in oxygen-enriched atmospheres. Metallurgical factors which influence materials performance and selection for oxygen applications are discussed. In addition, potential advanced oxygen applications and materials requirements for these applications are reviewed. Testing requirements for advanced applications are discussed. Advanced alloys capable of handling the complex and hazardous environmental conditions will be needed. Engineering trade-offs may be required.
metals, flammability, materials selection, promoted ignition-combustion, PICT behavior, oxygen-enriched atmospheres
Metallurgist and Oxygen Materials Specialist, East Aurora, NY