A Novel Y’ -Strengthened Nickel-Based Superalloy for Laser Powder Bed Fusion

An experimental printable gamma -strengthened nickel-based superalloy, MAD542, is proposed. By process optimization, a crack-free component with less than 0.06% defect was achieved by laser powder bed fusion (LPBF). After post-processing by solution heat treatment, a recrystallized structure was revealed, which was also associated with the formation of annealing twins. After the aging treatment, 60-65% gamma precipitates were obtained with a cuboidal morphology. The success of printing and post-processing the new MAD542 superalloy may give new insights into alloy design approaches for additive manufacturing.Funding Agencies|Swedish Agency for Innovation Systems, (Vinnova grant) [2016-05175, 2018-00804]; Linkoping University (SFO-MAT-LiU) [2009-00971]; center for Additive Manufacture-Metal (CAM2)