|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Controllable Thermal Stress and Micro-cracking in Processing Metallic Glasses by Selective Laser Melting
||Ning Li, Di Ouyang, Jianji Zhang, Lin Liu
|On-Site Speaker (Planned)
The ability to understand, predict and control thermal stress is crucial to selective laser melting of metallic glasses. Here, the origin of the thermal stress is probed through theoretical analysis, experiments and finite element simulation. The results revealed that the high thermal stresses caused mainly by the temperature gradient during rapid solidification, facilitates the initation of micro-cracks in three dimensional spaces. A 3D printing map that illustrates the correlation between fracture toughness and micro-crack is constructed, providing theoretical predication for choosing alloy systems lack of crack during SLM. The present results not only offer better in-depth understanding of the physical origin of micro-cracks, but also provide promising methods to moderate stress field near the crack tip and shield the initiation of crack propagation in the 3D printing of bulk metallic glasses.
||Planned: Supplemental Proceedings volume