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Dai J.,Shanghai JiaoTong University | Dai J.,Shanghai Key Laboratory of Materials Laser Processing and Modification SJTU | Huang J.,Shanghai JiaoTong University | Huang J.,Shanghai Key Laboratory of Materials Laser Processing and Modification SJTU | And 4 more authors.
Physics Procedia | Year: 2010

The weldability of a 9.5 mm thick Mg-Rare earth alloy NZ30K using 15 kW high power CO2 laser was studied. The microstructure and mechanical properties of the typical welded joints had been analyzed and tested. When using the right laser welding parameters, good weld forming can be obtained. The microstructure of the fusion zone is small equiaxed grains. There is no softening zone to be observed according to the micro-hardness distribution across the welded joints. The results show that the thick Mg-Rare earth alloy NZ30K plate can be welded by the high power CO2 laser with good weld quality. Source


Huang J.,Shanghai JiaoTong University | Huang J.,Shanghai Key Laboratory of Materials Laser Processing and Modification SJTU | Li Z.,Shanghai JiaoTong University | Li Z.,Shanghai Key Laboratory of Materials Laser Processing and Modification SJTU | And 6 more authors.
Physics Procedia | Year: 2010

For energy saving more and more high performance materials are to be applied. Welding of high performance materials or cladding of high wear resistance materials are critical research points for their wide application. In the paper laser welding of a 1000MPa complex phase steel and a novel TiB 2 reinforced aluminum metal matrix composite were investigated, where the weld formation, microstructure and mechanical properties of welded joints were discussed. Further a laser clad wear-resistant coating with a new designed Fe-based powder was introduced in term of microstructure and wear resistance. © 2010 Published by Elsevier B.V. Source

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