Abstract Scope |
Additive manufacturing (AM) is a powerful tool for alloy design and prototyping due to its ability to rapidly process complicated shapes with minimized wastes. However, the rapid heating and cooling cycle readily introduces texture with large columnar grains causing anisotropic properties and large residual stress, which significantly limits the application of the AM process over the traditional manufacturing methods. Therefore, there is an urgent need of discovering new alloys suitable for AM to reduce anisotropy in microstructure and properties. Through the ICME modeling and high-throughput characterization, a mixture of Stainless Steel 316L and Inconel 718 was designed using the laser powder bed fusion. After homogenization at high temperature, experimental observation confirms the expected phenomenon of grain refinement. Such a microstructure refinement due to a hybrid effect of entropy, residual stress, and Zener pinning particle indicates a pathway of using commercial powder mixture to design new alloys for AM. |