AI found laser settings to print a rocket copper alloy within a 40-experiment budget
Published
What WSU reports: a team led by computer scientist Jana Doppa used an AI search to choose laser settings for printing GRCop-42, NASA's copper-chromium-niobium alloy for rocket combustion chambers, and says it printed the alloy at 500 W for the first time. The search started from 37 earlier unsuccessful configurations and used a budget of 40 experiments over three months, finding six working settings at different laser powers out of more than 100 million possible settings. The release links the paper in the Proceedings of the AAAI Conference on Artificial Intelligence (DOI 10.1609/aaai.v40i47.41428); the release itself names no process, but the paper's abstract names directed energy deposition. Why it matters for materials: for an alloy that is hard to print, each trial is costly, so finding a working window with few trials matters. The release says one print can cost hundreds of dollars and checking a sample can take days. Our take: it shows printability on a research setup, not qualified rocket-grade material. The release gives no strength, porosity or conductivity numbers for the parts. Democratizing and less expensive are not quantified beyond an unsourced claim that ninety percent of commercial printers cannot print this alloy, and the release gives no power figure for other printers and does not say 500 W is within their range, though it implies the new settings could let common commercial printers print the alloy. GRCop-42 has no profile of its own in our archive yet. The nearest copper chamber alloy we cover is CuCrZr, with a thermal conductivity of 320 W/m-K at 20 °C (Luvata) and yield strengths from 233 MPa for a heat-treated printed part (Desktop Metal) to at least 500 MPa for a wrought R540 temper (Aurubis); these are datasheet values, not rocket tests. Those are the kinds of numbers a GRCop-42 print will be judged against. What we would watch: the first measured conductivity and porosity of AI-found prints. What would you check first?