Production of nanoporous superalloy membranes by load-free coarsening of γ′-precipitates

► Nanoporous superalloy membranes can be manufactured by load-free aging. ► Advantages are the simple process and the potential to fabricate larger membranes. ► We explain the effect of annealing temperature and duration on the membrane strength. ► Guideline to produce high-strength membrane materials with nanoscale porosity.