Liquid Metal Embrittlement of ASTM A723 Gun Steel by Indium and Gallium

An investigation was performed to determine the effects of gallium and indium on the liquid metal embrittlement of ASTM A723 gun steel. Liquid metal embrittlement tests were conducted slightly above the melting temperature of the embrittling metal in an elevated temperature furnace coupled to an Ins...

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Bibliographische Detailangaben
Hauptverfasser:	VIGILANTE, GREGORY N, TROlANO, EDWARD, MOSSEY, CHARLES
Format:	Report
Sprache:	eng
Schlagworte:	CYCLIC TESTS EMBRITTLEMENT FATIGUE LIFE FATIGUE TESTS(MECHANICS) FURNACES GALLIUM GUN BARRELS Guns HIGH SENSITIVITY HIGH TEMPERATURE INDIUM LIQUID METALS MELTING POINT Properties of Metals and Alloys STEEL TENSILE PROPERTIES TEST AND EVALUATION
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Zusammenfassung:	An investigation was performed to determine the effects of gallium and indium on the liquid metal embrittlement of ASTM A723 gun steel. Liquid metal embrittlement tests were conducted slightly above the melting temperature of the embrittling metal in an elevated temperature furnace coupled to an Instron mechanical tester. Low cycle fatigue and monotonic tensile testing of notched tensile specimens were performed. In addition, the effect of straln rate on the embrittlement of ASTM A723 by gallium was evaluated. The low cycle fatigue tests showed a high sensitivity to liquid metal embrittlement; both the gallium and the indium significantly degraded the fatigue life of the gun steel. Monotonic tests on ASTM A723 also showed an embrinling effect with both gallium and indium, although the effect was less severe than when tested in low cycle fatigue.