|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Quantifying Microstructure Heterogeneity for Qualification of Additively Manufactured Materials
|Synchrotron-based X-ray Microtomography Characterization of Solidification Cracks in Additively Manufactured IN738LC Alloy
|Haoxiu Chen, Yu Zou
|On-Site Speaker (Planned)
Additive manufacturing shows numerous unique advantages in the fabrication of complex nickel-based superalloy components. However, defect like solidification cracks is a major hindrance that impedes the further development of nickel-based superalloys in additive manufacturing technology seriously. Inconel 738LC samples were fabricated by laser powder bed fusion in different modes and investigated using a range of characterization techniques. Secondary electron microscopy and electron backscatter diffraction characterization confirm the solidification cracks. Synchrotron-based X-ray microtomography results reveal that from conduction mode to transition mode, the crack density increases four times, and the crack average thickness nearly doubled with the slight increase in the average crack length. The 3-dimensional data suggests that the larger plastic strain level leads to the formation of more cracks in the IN738LC alloy. This study reveals the critical mechanical factor affecting the cracking susceptibility of IN738LC and could be a guide for reducing solidification cracks in additive manufacturing.
|Additive Manufacturing, Characterization, Other