GH4169合金激光选区熔化成形工艺与缺陷特征的相关性OA北大核心CSTPCD
Correlation of forming process and defect characteristics of selective laser melted GH4169 alloy
通过改变激光选区熔化成形工艺,即激光功率和扫描速度,制备多个GH4169试样.采用金相法观察显微组织及其内部缺陷的形貌与分布,采用X射线断层成像获得试样孔隙率,并统计分析缺陷三维特征,研究成形工艺与缺陷特征的相关性.结果表明:当能量输入密度为 59.1 J/mm3 的优化工艺时成形试样中互相搭接的熔道形貌齐整、随机分布的规则气孔尺寸小于 30 μm、致密度高达 99.9998%.在较窄的工艺窗口下(220～300 W、700～1300 mm/s)…查看全部>>
Multiple GH4169 samples were prepared with the regulation of the forming process of selective laser melting(SLM),particularly in laser power and scanning speed.The microstructure including defect morphology and distribution was observed by using metallography.The sample porosity was acquired using X-ray computed tomography(XCT),and the three-dimensional characteristics of defect were also statistically studied.The correlation of forming process and defect ch…查看全部>>
高祥熙;杨平华;张帅
中国航发北京航空材料研究院,北京 100095||航空材料检测与评价北京市重点实验室,北京 100095||中国航空发动机集团材料检测与评价重点实验室,北京 100095中国航发北京航空材料研究院,北京 100095||航空材料检测与评价北京市重点实验室,北京 100095||中国航空发动机集团材料检测与评价重点实验室,北京 100095中国航发北京航空材料研究院,北京 100095
金属材料
激光选区熔化GH4169合金成形工艺熔道缺陷
selective laser meltingGH4169 alloyforming processmelting tracedefect
《航空材料学报》 2024 (1)
104-111,8
评论