Quantitative Research on the Effect of Natural Aging on the Mechanical Properties and Bake Hardening Properties of AA6014 Alloy within Six Months

This article is dedicated to quantitatively and systematically revealing the changes of mechanical properties bake hardening AA6014 alloy during six-month natural aging in detail. Three directions (0, 45, 90° relative rolling direction) aluminum sheets 16 time points within six months were selected conduct experiments. The change trend (0.2% offset yield strength, ultimate tensile plastic extension at maximum force, elongation after fracture, strain exponent) obtained by a large number micro-hardness measurements tests. results show that elongations along three are basically same do not drop significantly with progress but fluctuate certain range. trends n value before opposite leads ~0.07 decrease value. PLC phenomenon disappears 90 days aging, strengths also stabilize; thus, it can be inferred cluster tend stabilize aging. systematic dataset clearly intuitively presented, which only used provide data reference for industrial production automobile manufacturers reveal microscopic mechanism process.