Fig. 8: Uncertainty of the tensile property and microstructure of as-built 90 wt.% P91 alloy.

a Uniaxial tensile stress-strain curves of as-built samples. b SEM image of the test 1 fracture, (c) SEM image of the test 3 fracture, SEM image showing the difference of porosity at (d) bottom, (e) middle, (f) and top of the 90% P91 build, SEM image using secondary electron of the (g) test 1, (h) test 3 gauge length part of the 90% P91 build, and (i) schematic showing the variation of pores at different locations.