High Power Laser Powder Deposition Repair of AISI 4340 Steel in Aircraft Applications

High Power Laser Powder Deposition Repair of AISI 4340 Steel in Aircraft Applications

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摘要 High power laser powder deposition (LPD) has been used to investigate the potential of repairing damaged aero-grade high strength steel.Metallurgical analysis was performed to analyze the integrity of the clad layer.A 4kW fiber laser was used to deposit two separate alloys (AISI 4340 and AISI 420 stainless steel) on an AISI 4340 steel substrate and metallurgical analysis was performed to analyze the integrity of the clad layer.No microcracks was observed on the clads,but porosity and high dilution was observed on most clads.However,microstructural analysis showed a crack and porosity free clad layer with low dilution can be achieved for some laser conditions. High power laser powder deposition (LPD) has been used to investigate the potential of repairing damaged aero-grade high strength steel.Metallurgical analysis was performed to analyze the integrity of the clad layer.A 4kW fiber laser was used to deposit two separate alloys (AISI 4340 and AISI 420 stainless steel) on an AISI 4340 steel substrate and metallurgical analysis was performed to analyze the integrity of the clad layer.No microcracks was observed on the clads,but porosity and high dilution was observed on most clads.However,microstructural analysis showed a crack and porosity free clad layer with low dilution can be achieved for some laser conditions.

作者 Mohammed Reza D Janardhana Madabhushi Brandt Milan Clark Graham

机构地区 School of Aerospace Aircraft Structural Integrity Section

出处《Journal of Iron and Steel Research(International)》 SCIE EI CAS CSCD 2011年第S1期447-451,共5页 钢铁研究学报（英文版）

关键词 laser powder deposition high strength steel fiber laser microstructure HARDNESS laser powder deposition high strength steel fiber laser microstructure hardness

分类号 V261.8 [航空宇航科学与技术—航空宇航制造工程] TG174.44 [金属学及工艺—金属表面处理]

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High Power Laser Powder Deposition Repair of AISI 4340 Steel in Aircraft Applications

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