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Many alloys made by Additive Manufacturing (AM) require careful design ofpost-heat treatment as an indispensable step of microstructure engineering tofurther enhance the performance. We developed a high-throughput approach byfabricating a long-bar sample heat-treated under a monitored gradienttemperature zone for phase transformation study to accelerate the post-heattreatment development of AM alloys. This approach has been proven efficient indetermining the aging temperature with peak hardness. We observed that theprecipitation strengthening is predominant for the studied superalloy by laserpowder bed fusion, and the grain size variation is insensitive on temperaturebetween 605 and 825 Celcius. This new approach can be applied to post-heattreatment optimization of other materials made by AM, and further assist newalloy development.

A new high-throughput method using additive manufacturing for alloy design and heat treatment optimization