Residual stress state and Evolution during fatigue crack propagation Additively Manufactured 316L austenitic stainless steels
Additive manufacturing (AM) has evolved from a technology for rapid prototyping and starts to become a matured production process used in several industries. Laser Powder Bed Fusion (LPBF) is a AM technology which allows to fabrication of complex structures, which cannot be produced conventionally via subtractive manufacturing methods. The high temperature gradients during the LPBF process introduces residual stresses into the produced structures, which can impact both the production (cracking, distortion) and subsequent mechanical properties (mean stress in fatigue). This proposed experiment aims to explore the residual stress in fatigue crack growth specimens and the Evolution of residual stresses following fatigue loading in the presence of an advancing fatigue crack. In particular characterise the stability of the residual stresses under an advanced fatigue crack and observe the redistribution of the residual stress profile found in LPBF specimens.
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EVANS Alexander; BRUNO Giovanni; PIRLING Thilo and SPRENGEL Maximilian. (2021). Residual stress state and Evolution during fatigue crack propagation Additively Manufactured 316L austenitic stainless steels. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-02-341
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