论文信息 - Relationship between manufacturing defects and fatigue properties of additive manufactured austenitic stainless steel

Relationship between manufacturing defects and fatigue properties of additive manufactured austenitic stainless steel

Abstract Tensile properties, fatigue crack initiation, fatigue crack growth rate, and fatigue life are evaluated in 304L austenitic stainless steel fabricated by directed energy deposition (DED). Large lack of fusion (LoF) defects (often >1 mm in length) significantly reduce ultimate tensile strength and ductility, as well as accelerate fatigue crack initiation and reduce fatigue life. In comparison, small spherical defects (

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