FATIGUE AND NOTCH BEND PROPERTIES OF HIGH-STRENGTH ALUMINUM ALLOYS

摘要

THIS IS THE THIRD REPORT ON AN INVESTIGATION OF THE MECHANICAL PROPERTIES OF HIGH-STRENGTH, STRUCTURAL ALUMINUM ALLOYS PRODUCED IN HEAVY SECTIONS. ALTHOUGH TENSILE STRENGTHS OF THE ALLOYS RANGED FROM 40,000 TO 75,000 PSI, LITTLE DIFFERENCE IN FATIGUE AND CORROSION FATIGUE PROPERTIES WAS FOUND AMONG ALLOYS ON THE SASIS OF A 10,000,000 CYCLE LIFE. TESTS RUN TO 100,000,000 CYCLES INDICATED SOME SUPERIORITY FOR THE LOWER STRENGTH ALLOYS OF THE GROUP.