Effect of specimen geometry and orientation on tensile properties of Ti-6Al-4V manufactured by electron beam powder bed fusion

Tensile testing is often proposed as the preferred methodology to qualify builds and materials produced through additive manufacturing. While there already work demonstrating difference in measured properties between tensile specimens different build orientations, this does not extend specimen geometries. In addition, body of knowledge domain typically made up studies that utilize custom combinations geometries, part finishing, post-processing, making it challenging compare results. To study impact geometry on results, a selection standard types provided ASTM E8/E8M was prepared Ti-6Al-4V using an electron beam powder bed fusion manufacturing machine. These were characterized observe any porosity defects, dimensional deviations, surface topography could performance. It found changes geometry, size, orientation, internal porous defects; have significant effects specimens. The horizontally built had higher yield strengths, but lower elongation compared vertically With increase cross-sectional area, yield, strength, elastic modulus observed. area volume ratio, decrease strength. average solid fraction no influence properties. Furthermore, with maximum pore decreased.