Journal
MATERIALS
Volume 13, Issue 21, Pages -Publisher
MDPI
DOI: 10.3390/ma13214930
Keywords
nickel-based superalloy; γ ′ phase; laser powder bed fusion; alloy development
Categories
Funding
- Swedish Agency for Innovation Systems, (Vinnova grant) [2016-05175, 2018-00804]
- Linkoping University (SFO-MAT-LiU) [2009-00971]
- center for Additive Manufacture-Metal (CAM2)
- Vinnova [2018-00804] Funding Source: Vinnova
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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.
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