METALLURGICAL AND MECHANICAL PROPERTIES EVALUATION OF A HEAT TREATED 7A1-4MO TITANTIUM ALLOY FORGING.
MCDONNELL AIRCRAFT CORP ST LOUIS MO
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The mechanical and metallurgical properties of a 7Al-4Mo Titanium alloy Gemini Main Landing Gear Strut forging 52-39057 were evaluated to insure conformance with MMS-124 requirements. The room temperature long transverse and short transverse tensile properties were evaluated in addition to the longitudinal tensile properties specified in MMS-124. The Rockwell C hardness across longitudinal and transverse cross sections of the forging was determined. The grain flow, microstructure, and chemical composition were determined. The chemical composition and longitudinal tensile properties, except for reduction in area, conformed to MMS-124. The short transverse and long transverse tensile properties, except for reduction in area, exceeded the required longitudinal properties. Author