A5018672129- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Additive Manufacturing and 3D Printing Technologies
- Welding Techniques and Residual Stresses
- Advanced Measurement and Metrology Techniques
- Laser Design and Applications
- Advanced Fiber Laser Technologies
- High-Temperature Coating Behaviors
- Nuclear Materials and Properties
National Tsing Hua University
2002-2021
The microstructure and tensile property of Al0.2Co1.5CrFeNi1.5Ti0.3 high entropy alloy (HEA) processed by selective laser melting (SLM) have been studied in comparisons to that fabricated traditional cast & wrought (C&W) route. C&W samples were annealed then aged at 750 ℃ for 50 h promote precipitation strengthening L12 structured phase FCC matrix. By contrast, SLM directly from the as-built condition, which possessed sub-micron dendritic segregation, internal stress nano oxides; result was...
An effective strategy to strengthen a superalloy processed by selective laser melting (SLM) is proposed. The aim increase the yield strength of Inconel 718 fabricated SLM beyond 1400 MPa, which has never been achieved before. In this study, various NbC additions (0.0%, 0.5%, 1.0%, and 5.0% weight) were added in powder bed 718, two types post-SLM heat treatments investigated, i.e., solution treated plus aging (STA) direct (DA). With addition, smaller depth melt pool finer dendritic cells...
We present our work on the frequency measurement of iodine-stabilized 543 nm He-Ne laser. have finished following experiment: compact laser and cavity enhanced second harmonic generation CO/sub 2/ are preparing final measurement, results will be presented.