Effect of plastic strain on the solidification cracking of Hastelloy-X in the selective laser melting process

There is a growing demand to produce parts from Hastelloy-X materials, which exhibit high unit cost per weight, by the selective laser melting (SLM) process. However, when material was employed, solidification crack occurred during SLM This cracking can be reduced or eliminated optimizing process parameters, such as power and scan speed, although optimization time- cost-intensive. In this study, we evaluated possibility of exploring change in plastic strain, obtained thermal elastoplastic analysis, process, an indicator occurrence cracking. The experimental observations single-track formation tests for various conditions, degree strain were compared. part foundational made clear correlation between maximum melted area existence less than 0.0041 no found, whereas it range larger 0.0048 cracks observed. These results indicated assessing cracking, terms area.