INFLUENCE OF LASER DMD TECHNIQUES ON MICROSTRUCTURE OF INCONEL 718 HIGH-TEMPERATURE ALLOY
Direct Metal Deposition (DMD), combined with CAD/CAM technology, material powder metallurgy technology, optics technology, is an effective method of rapid manufacturing, which can be used to control the properties of metalwork by controlling the microstructure of metal deposition layer. As a hightemperature nickel-base alloy containing high Nb, Inconel 718 is widely applied in the key parts of aerospace engines in virtue of its excellent hightemperature intensity, antioxygenic property, hot corrosion resisting property, fatigue resistivity and rupture resistivity. Laser DMD technology supplied a new way for the direct manufacture and reparation of the complex parts made of Inconel 718. The laser DMD experiments were performed on Inconel 718 in this paper, the microstructure in different laser processing parameters were researched and analyzed by SEM and EBSD, and the DMD process variables were optimized. And the influence on the growth of crystal grain of laser deposition layer under different molten pool temperature was discussed as well. As a result, the discipline of microstructure under different technics condition was obtained, which establishes the foundation of DMD to control microstructure and then to control properties of metalwork.
Jianhua Yao Jyoti Mazumder
The MOE Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, Center for Laser Aided Intelligent Manufacturing, University of Michigan, Ann Arbor, MI 48109, USA
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
301-306
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）