TR-81-4032, AFWAL TECHNICAL REPORT: COMPILATION OF MECHANICAL PROPERTY DATA FOR IMPROPERLY QUENCHED (SOFT) ALUMINUM PLATES (JUL-1981)

TR-81-4032, AFWAL TECHNICAL REPORT: COMPILATION OF MECHANICAL PROPERTY DATA FOR IMPROPERLY QUENCHED (SOFT) ALUMINUM PLATES (JUL-1981)., ata is summarized from a number of investigations that dealt with the overall issue of substrength aluminum plates. An improper heat-treatment resulted in localized areas of the plates with low mechanical properties. For these plates itisshown that:tensile, compression, and bearing strengths are significantly reduced; fatigue properties are reduced, particularly for 2000-series alloys; fatigue crack growth rates are faster in2000-series alloys but may be slower inhigh strength 7000-series alloys; stress corrosion properties are not reduced; toughness may increase; and the loss of strength can be reflected in electrical conductivity and hardness readings. The report also contains a statistical evaluation of tensile data from this study and other sources relating yield and ultimate tensile strength with electrical conductivity and hardness.