30 research outputs found

    High temperature constitutive and crack initiation modeling of coated single crystal superalloys

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    The purpose of this program is to develop life prediction models for anisotropic materials used in gas turbine airfoils. In the base portion of the program, two coated single crystal alloys are being tested. They are PWA 286 overlay coated and PWA 273 aluminide coated PWA 1480 and PWA 286 overlay coated Alloy 185. Viscoplastic constitutive models for these materials are also being developed to predict the cyclic stress-strain histories required for life prediction of the lab specimens and actual airfoil designs

    KEYNOTE ADDRESS—THE ROLE OF EDUCATION IN VERTEBRATE PEST CONTROL

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    Lack of adequate information is emphasized as a major problem in attaining effective control of damage by vertebrate pests, and it is stressed that the problem is widespread in all elements of the public, including those directly involved, like producers and government officials, as well as those only indirectly involved, like the average citizen. A number of specific examples are cited to illustrate the problems of uninformed or inadequately informed publics

    Canada Jay in Southern Minnesota

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    Ring-necked Duck Nesting in Maine

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    Ring-Necked Duck Nesting in Maine

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    Canada Jay in Southern Minnesota

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