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The Nature of the Change in Strength of Certain Materials During Creep,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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Test procedures, special equipment, and test results from research on the change in stress-rupture and tensile strength of steel 1Kh18N9T and the Al-alloy D16T are described. It was established that during creep softening of the material proceeds according to a complex law. Intensive softening occurs at the beginning and at the end of the creep the intermediate period of creep is characterized by virtually stable strength values. The possibility of sudden failure under overload of certain materials subjected to prolonged subcritical steady-state loading is demonstrated. Author
APPROVED FOR PUBLIC RELEASE