研究目的
To understand the microstructural evolution during laser polishing of Ti-6Al-4V laser-based powder bed fusion samples and to evaluate the impact of laser polishing on material hardness and residual stresses.
研究成果
The study provided insights into the changes that occur in the material in the laser affected areas and presented a computational model that can rapidly estimate the depth of these zones. This enables a more informed decision about the suitability of laser polishing based on each part’s specific requirements.
研究不足
The fluid flow during melting was not directly considered in the model to maintain low computational time. The expected evident difference in the hardness of the laser polished samples within the HAZ and beyond was not observed in the current measurement results.
1：Experimental Design and Method Selection:
A thermal model was applied to predict the dimensions of the melted zones and the heat-affected areas. The process simulations were performed on COMSOL Multiphysics
2：Sample Selection and Data Sources:
Ti-6Al-4V blocks manufactured via L-PBF were analyzed in three conditions: after the AM process, after heat treatment for stress relief, and after sandblasting.
3：List of Experimental Equipment and Materials:
A combination of TruCell 3010 machine and TruDisk 3001 radiation source was used for the laser polishing process.
4：Experimental Procedures and Operational Workflow:
The laser polishing process was executed ex situ, with the parts being removed from the AM machine and processed in a separate laser system.
5：Data Analysis Methods:
The results obtained through simulations were discussed and compared to the experimental data.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
