APPLICATION OF APPLIED LOAD RATIO STATIC TEST SIMULATION TECHNIQUES TO FULL-SCALE STRUCTURES. VOLUME II. MATERIAL PROPERTIES STUDIES AND EVALUATION.
Engineering rept., vol-2,
NORTH AMERICAN AVIATION INC COLUMBUS OHIO
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Volume II contains the tensile program, tabulated data, derivation of Larson-Miller constants and parametric curves, and the relationships between actual stabilizer properties and the tensile coupon data for compatibility in the analytical-experimental phase of the program described in Volume IV. This study was performed on the two main structural materials of the horizontal stabilizer, i.e., 7079-T6 aluminum alloy bare plate and AZ31B-H24 magnesium alloy. Data from other sources was used for 7075-T6, 4340 steel, and stainless steel, and were regarded as sufficiently accurate for the intended usage. Parametric curves with temperature-time exposure defined by the Larson-Miller Parameter are derived for 7079-T6 aluminum alloy where the primary problem is over-aging produced by the elevated temperature test conditions. The curves derived are useful for defining the tensile yield stress and tensile ultimate stress of 7079-T6 aluminum alloy in complex temperature-time environments. No parametric curves are shown for the AZ31B-H24 magnesium alloy since low initial room temperature properties and relative insensitivity to exposure time at elevated temperature prevent an accurate definition of the Larson-Miller constant for this material. Author
- Metallurgy and Metallography