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祝贺欧阳迪文章被Intermetallics接受发表

发布时间:2017年07月13日 点击次数:

3D printing of Crack-free high strength Zr-based bulk metallic glass composite by selective laser melting


Abstract:

3D printing of crack-free bulk metallic glasses remains challenge due to the generation of huge thermal stress during selective laser melting and their intrinsic brittleness. Herein, Zr55Cu30Ni5Al10 system was selected and 3D printed by selective laser melting technique. The results indicated that bulk metallic glassy composite comprising a large fraction (about 83%) of amorphous phase and minor fraction of intermetallic compounds with free of cracks were successfully fabricated. The 3D printed metallic glassy composite exhibited high strength over 1500 MPa. Experiment combined with finite-element-method simulation not only revealed the mechanism of crystallization at heat affect zones, but demonstrated that low thermal stress reduce the risk of micro-cracks generation and fracture toughness plays a  crucial role in suppression the crack propagation during selective laser melting process.


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