Smart alloying and microstructural engineering mitigate challenges associated with laser-powder bed fusion additive manufacturing L-PBFAM. A novel AlNiTiZr alloy utilized grain refinement by heterogeneous nucleation and eutectic solidification to achieve superior performance-printability synergy. Conventional mechanical testing cannot delineate complex micromechanics of such alloys.
The high-throughput nanoindentation investigation successfully delineated various mechanisms occurring at meso and microscopic length scales in the newly designed and laser powder bed fusion additively manufactured Al3Ni1Ti0. 8Zr wt alloy. The high-resolution nano-hardness map captures mechanical signatures of hierarchical heat distribution associated with the L-PBFAM process. Microstructural investigation in the intended regions established a strong relationship between the microstructural heterogeneity and the observed mechanical responses. This map is effective in pinpointing the weakest and strongest sections in the pool with microscopic accuracy.
Date: 31Oct,2022
