Fatigue properties of Scalmalloy® processed by laser powder bed fusion in as-built, chemically and conventionally machined surface condition
نویسندگان
چکیده
Additive manufacturing of metallic parts via laser powder bed fusion has is attractive for applications such as aerospace engineering due to the high weight-saving potential, which based on ability process produce complex designs. The aluminum alloy Scalmalloy® can increase this potential lightweight design further with its strength and ductility. These advantages already led a variety use cases statically loaded parts. Research dynamic mechanical behavior far less extensive than other materials AlSi10Mg. There limited insight into fatigue mechanisms in as-built various surface-finished states. This study aims understand fatigue-fracture not only two different surface conditions but also machined chemically milled Fatigue specimens four modifications were produced, their morphology was characterized correlated performance. Fractographic analysis conducted reveal fracture-inducing defects. Defect-based modeling shown describe influence defect size verifies that properties are independent sample size. Kitagawa-Takahashi-diagrams drawn upon explain size, an equivalent initial flaw (EIFS) defined coupled El-Haddad-type model arrive at unified predicting all despite differences nature.
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ژورنال
عنوان ژورنال: Journal of Materials Processing Technology
سال: 2023
ISSN: ['0924-0136', '1873-4774']
DOI: https://doi.org/10.1016/j.jmatprotec.2022.117811