Study on the effect of cold rolling and annealing process on the microstructure and mechanical properties of 5083 aluminum alloy sheet
This paper systematically studied the microstructure,tensile mechanical proper-ties,and bending properties of 5083O aluminum alloy sheet under different cold rolling re-ductions(5％-40％)and annealing temperatures(120 ℃-280 ℃)with metallographic microscope,tensile testing machine,and bending testing machine.The results show that grain size of 5083O aluminum alloy sheet is fine and uniform equiaxed.As the cold rolling reduction increases from 5％to 40％,the grain is gradually flattened and elongated.The bending performance of sheet with a cold rolling reduction≤10％is good.When the cold rolling reduction is 20％,uneven necking areas appear on the outer side of the bent sample.When the cold rolling reduction increases to 30％,microcracks appear in the bent sample.When the reduction increases to 40％,the number and size of cracks increase.For sheet with different cold rolling reduction.As the annealing temperature increases from 120 ℃ to 280 ℃,the yield strength and tensile strength show a monotonic decreasing trend,the decrease of yield strength is greater than that of tensile strength,and the elongation after fracture shows a monotonic increasing trend.When the cold rolling reduction is 20％,annealing treatment above 200 ℃ is required for the sheet to meet the bending performance requirements.When the cold rolling reduction increases to 30％and 40％,annealing treat-ment above 240℃is required for the sheet to meet the bending performance requirements.
new energy vehicle battery pack5083 aluminum alloy sheetmicrostruc-turemechanical properties
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