Additively manufactured (Fe, Ni)Al-reinforced nickel aluminum bronze with nearly-isotropic mechanical properties in build and transverse directions

Abstract

This work reports additive manufactured (Fe, Ni)Al-reinforced nickel aluminum bronze by the electron beam powder bed fusion (EB-PBF) method. All EB-PBF composites show a high relative density of >99% and a homogeneous microstructure with equiaxed grains and homogeneously distributed (Fe, Ni)Al precipitates, enabling their nearly-isotropic mechanical behavior in build and transverse directions. This isotropic mechanical behavior results from a collective effect of high relative density, homogeneously-distributed precipitates, equiaxed grains, and a subsequently sustainable strain-hardening ability from progressively twin-precipitate and dislocation-precipitate interactions. • (Fe, Ni)Al-reinforced nickel aluminum bronze is fabricated by electron beam powder bed fusion. • All built materials show a high relative density of >99% with nearly-equiaxed grains. • The built materials have isotropic mechanical properties in build and transverse directions. • The isotropic mechanical behavior is attributed to the outstanding sustainable strain-hardening ability.