
Is a crack-free FGM transition between Invar-36 and Zerodur feasible via DED if the CTE is matched?
Given that Invar-36 and Zerodur possess nearly identical CTE profiles (<1.5 \times 10^{-6}/\text{K}), we are simulating a scenario where the 300\text{K} thermal delta of a Lunar/Arctic transition is neutralized purely through isothermal equilibrium rather than active insulation. Does anyone think it’s possible to maintain a \pm 28\mu\text{m} dimensional stability in a real-world DED melt pool, or are we overestimating the stabilization power of CTE-matching in dissimilar material fusion? We’ve seen the math hold up in digital twins—is the hardware ready for this?