The influence of inter-layer dwell time on the residual stress formation in 316L stainless steel manufactured by laser powder bed fusion
Interlayer dwell time is considered an important process process parameter for Laser Powder Bed Fusion (LPBF), which is an additive manufacturing technique used to create complex components which are difficult or impossible to manufacture conventionally. The interlayer dwell time can strongly affect the thermal history of the built material, influencing the residual stresses, microstructure, defect and mechanical properties of manufactured parts. Understanding the correlation between the interlayer time and these resulting material conditions are one of the keys to optimising the build strategy in powder bed fusion in combination will other parameters which are out of scope for this experiment. The proposed experiment will study the influence of interlayer time on residual stress in LPBF 316L, which is widely used in a range of industries. The results will be compared against microstructure, NDT and mechanical testing in order to understand the relationships between the thermal history during production and resulting material performance.
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EVANS Alexander; BRUNO Giovanni; CABEZA Sandra; MISHUROVA Tatiana; PIRLING Thilo; Itziar Serrano-Munoz; SPRENGEL Maximilian and ULBRICHT Alexander. (2019). The influence of inter-layer dwell time on the residual stress formation in 316L stainless steel manufactured by laser powder bed fusion. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-02-276
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