航空材料学报2024，Vol.44Issue(3)：95-101,7.DOI:10.11868/j.issn.1005-5053.2021.000197
基于微尺度数字图像相关法的预腐蚀对增材制造AlSi10Mg损伤失效影响
Effect of pre-corrosion based on micro-scale digital image correlation on damage failure of additive manufacturing AlSi10Mg
摘要
Abstract
The damage evolution and failure process of pre-corroded additive manufacturing AlSi10Mg through in-situ tensile experiments under an optical microscope and micro-scale digital image correlation(μ-DIC)were investigates.Combining the microscopic deformation field evolution,material microstructure,three-dimensional corrosion morphology and fracture microscopic morphology to analyze the initiation and propagation of micro-cracks in pre-corroded AlSi10Mg.The results show that the stress concentration around the corrosion pits and subsurface defects(caused by the additive manufacturing process)leads to the initiation of micro-cracks.There are multiple micro-cracks initiating at the same time,and the propagation and coalescence of micro-cracks originated from the key damage regions dominate the final failure of the specimen.Material micro-structure and corrosion morphology have an important influence on crack propagation.关键词
增材制造铝合金/局部腐蚀/原位拉伸测试/数字图像相关法/损伤演化Key words
additive manufactured aluminum alloy/localized corrosion/in-situtensile test/DIC/damage evolution分类
航空航天引用本文复制引用
江圣,杜娟,宋海鹏..基于微尺度数字图像相关法的预腐蚀对增材制造AlSi10Mg损伤失效影响[J].航空材料学报,2024,44(3):95-101,7.基金项目
国家自然科学基金面上项目(11972364) （11972364）
天津市研究生科研创新项目(2021YJSS130) （2021YJSS130）
