Journal
JOURNAL OF LASER APPLICATIONS
Volume 28, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.2351/1.4943903
Keywords
laser forming repairing; K465 nickel-base superalloy; gamma ' phase; morphology evolution
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Laser forming repairing (LFR) was performed on the damaged K465 nickel-base cast superalloy parts. LFR presented the uneven microstructure characteristics at different positions of the LFRed K465 superalloy, such as substrate zone (SZ), heat affected zone (HAZ), and repaired zone (RZ), which experienced the different thermal history. Compared with the coarser gamma' precipitates in the cast SZ, the gamma' precipitates in RZ were refined obviously. As for HAZ, gamma' phase presented an incomplete solid solution and reprecipitation growth characteristics. This led to an increase in the microhardness from SZ, HAZ to RZ. (C) 2016 Laser Institute of America.
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