Intragranular cellular segregation network structure strengthening 316L stainless steel prepared by selective laser melting

By Y. Zhong, Leifeng Liu, S. Wikman, D. Cui, Zhijian Shen. 2016

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High cycle fatigue life prediction of laser additive manufactured stainless steel: A machine learning approach (2019, background): “directional grains and melt pools at the macro-scale, and ultrafine sub-grains, porosities and inclusions at the micro-scale [16, 17], become relevant.”
Steels in additive manufacturing: A review of their microstructure and properties (2020, background): “The high tensile and yield strength have been related to the finer microstructure and dislocation substructure as per Hall-Petch relation [27,38,42,47].”
Fatigue and fracture behaviour of laser powder bed fusion stainless steel 316L: Influence of processing parameters (2017, background): “The ultrafine grains are in the order of a few microns [13, 14], which is much smaller than the length scale of casting where dendrite cells and second phase particles are in the order of tens of microns [15, 16].”