TOPOGRAPHIC ANALYSIS OF HOLES DRILLED BY PULSED ND:YAG LASER ON DD6 SINGLE-CRYSTAL SUPERALLOY
Industrial applications of laser drilling include the production of cooling holes at vertical and acute angles in certain parts of the aero-engine components. Singlecrystal nickel base superalloy turbine blades are being utilized in rocket engine turbopumps and turbine engines because of their superior creep, stress rupture, melt resistance, and thermomechanical fatigue capabilities over polycrystalline alloys. In this paper, laser drilling is used to manufacture cooling holes in DD6 single-crystal superalloy. Holes having diameters about 580 μ m were percussion drilled with a ND: YAG laser. Defects such as delamination, spatter and micro-crack formed during laser drilling process is investigated through a study of vertical and acute angle drilled holes. Topographies of holes in DD6 singlecrystal superalloy by pulsed ND: YAG laser were analyzed. Recast layers, delamination, microcracks and spatters were found on the hole-walls. And the morphology of the recast layers, microcracks and spatters were clearly revealed by scanning electron microscope(SEM) in the present study.
Laser drilling DD6 single-crystal superalloy Recast layer spatter
Chen Changjun Zhang Min Zhang Shi-chang Chang Qing-ming Yan Wen-qing Zhang Xiao-bing
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Laser Proc Key Laboratory for High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturin
国际会议
第三届太平洋国际激光与光学应用会议(PICALO 2008)
北京
英文
430-435
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）