Enhanced mechanical properties of Ti6Al4V alloy fabricated by laser additive manufacturing under static magnetic field

This study introduced a novel magnetic-field regulation method in metallic additive manufacturing to achieve the refined grain structure and enhanced mechanical properties without post-treatment composition changes. As showcase material, Ti6Al4V alloy was fabricated using direct energy deposition under static magnetic field (SMF). It is found that transverse SMF of 0.55 T can effectively regulate microstructure with twisted prior-β grains (strong <001> orientation weak <110> orientation) discontinuous α boundaries. The tensile test shows significant improvement elongation (εf) both longitudinal directions slight strength decrease.