Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg

Fatigue strength is largely affected by the influence of discontinuities: geometric notches like holes and corners in components, surface (roughness), pores inclusions material. Therefore fatigue structures materials a local problem calculations are best carried out using approaches such as stress concept, strain concept or fracture mechanical concepts. In this investigation, discontinuities on low cycle high was examined example additively produced material specimens made aluminium AlSi10Mg mechanics parameter. Results tests hourglass-specimens from four different series 3-D printed presented. The examination surfaces revealed that damage always started located near specimens. fractography gave information about geometry, size position crack-causing pores. investigated modification Murakami’s √area common scatter band test could thus be reduced significantly.