STP1111

    Promoted Ignition-Combustion Behavior of Selected Hastelloys® in Oxygen Gas Mixtures

    Published: Jan 1991


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    Abstract

    Promoted ignition and more recently promoted combustion are terms which have been used to describe a situation where a substance with low oxygen compatibility ignites and supports the combustion of a more ignition resistant material. Previous papers by Union Carbide have reported on the investigation of this phenomenon as it related to carbon steel, 316L stainless steel, aluminum-bronze, Carpenter® 20Cb-3, Incoloy® 65, Inconel® 625 and Haynes® 25. In this paper, additional data will be presented on the promoted ignition-combustion behavior of various Hastelloy® type materials, which are significant engineering alloys that may be encountered in or considered for gaseous oxygen applications in severe environments.

    In this investigation, alloys have been evaluated via both flowing and static (fixed volume) approaches using the rod configuration used in the joint ASTM-CGA-NASA program. Static tests have been conducted in a vessel of the same volume as the apparatus used by NASA in the joint ASTM-CGA-NASA test program conducted at WSTF and also in a larger 6.0 liter vessel. Oxygen-nitrogen gas mixtures with purities ranging from approximately 40% to 99.7% at pressures of 3.55 MPa to 34.6 MPa were used in the comparative studies of five Hastelloy® compositions.

    As an adjunct to this investigation, neural network techniques were utilized in the analysis of the data. Neural network analysis is an artificial intelligence technique which mimics the human brain. The data generated in this investigation and other work was incorporated into a predictive tool.

    Keywords:

    Oxygen, Metals Ignition, Promoted Ignition-Combustion, Hastelloy® C-276, Hastelloy® C-22, Hastelloy® G-3, Hastelloy® G-30, Neural Network Analysis, Artificial Intelligence, Burn Predictions


    Author Information:

    Zawierucha, R
    Manager and Engineering Associate, Materials Engineering Laboratory, Union Carbide Industrial Gases Inc., Tonawanda, NY

    McIlroy, K
    Manager and Engineering Associate, Materials Engineering Laboratory, Union Carbide Industrial Gases Inc., Tonawanda, NY

    Mazzarella, RB
    Engineering Associate, Computer Applications, Union Carbide Industrial Gases Inc., Tonawanda, NY


    Paper ID: STP17768S

    Committee/Subcommittee: G04.01

    DOI: 10.1520/STP17768S


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