To clarify the influence mechanism of crack source location on aluminum alloy plastic deformation parts,aluminum alloy plastic deformation parts samples with different crack source locations were prepared,and the fracture morphology,mechanical properties,high-temperature oxidation resistance,and fatigue performance of the samples were tested.The experimental results indicate that the strength,toughness,fracture elongation,oxidation resistance,and fatigue life of aluminum alloy plastic deformation parts are significantly affected by the location of the crack source.Samples with crack sources far from stress concentration areas exhibit better performance,can withstand greater plastic deformation,have a uniform and stable oxide layer,and have a lower risk of fatigue failure.On the contrary,for samples with crack sources located in the middle or root of the notch,due to stress concentration and potential damage,all performance indicators have decreased,especially at the root of the notch,where performance is significantly reduced.Therefore,in the design,production,and use of aluminum alloy plastic deformation parts,the control of crack sources should be highly valued to ensure the optimal performance of plastic deformation parts.
关键词
铝合金塑性变形件/裂纹源位置/力学性能/疲劳性能/断裂伸长率
Key words
aluminum alloy plastic deformation parts/the location of the crack source/mechanical properties/fatigue performance/elongation at break
维普
万方数据