In recent years, multi-material additive manufacturing has gained significant interest due to its high level of design freedom, integrating structure and function to achieve tailored properties. The latest progress of multi-material laser powder-bed fusion (M2LPBF), makes it possible to print at least two different materials along the built direction and within a single layer of a component [1]. In such materials, interfacial defects such as pores, cracks, or delamination are critical challenges, as they can weaken the interface bonding of the multimaterial structures [2]. In particular, since the mechanical properties of the component depend on the interfacial bonding, a proper characterization of the microstructure and the presence of defects at the interface is a critical aspect of analyzing M2LPBF specimens.

In this respect, diffraction contrast neutron imaging also called Bragg Edge Imaging (BEI) has shown the capability to quantitatively map phases, residual stresses and crystallographic texture distributions with high spatial resolution. Here we will present the application of BEI to perform strain mapping and texture characterization of M2LPBF specimens of AISI 316/CuCrZr and Ni/CuCrZr built with different geometries, employing the neutron diffractometer POLDI at PSI.