Effect of annealing treatment on microstructure evolution and deformation behavior of 304 L stainless steel made by laser powder bed fusion

•Microstructural evolution of LPBF 304 L SS at all length scales during annealing was comprehensively investigated.•As-built samples contained the square lattice distortion networks composed of orthogonal strain ripples using HRTEM.•High annealing temperature resulted in the unidirectional dislocati...

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Veröffentlicht in:	International journal of plasticity 2022-08, Vol.155, p.103335, Article 103335
Hauptverfasser:	Zhang, Hongzhuang, Li, Changyou, Yao, Guo, Shi, Yanlin, Zhang, Yimin
Format:	Artikel
Sprache:	eng
Schlagworte:	304 L stainless steel Additive manufacturing Annealing Annealing treatment Austenitic stainless steels Deformation effects Design optimization Dislocation density Dislocation migration Distortion Elongation Evolution Grain sub boundaries Grains Microstructural evolution Microstructure Misalignment Powder beds Recrystallization Ripples Solution annealing Stainless steel Tensile deformation Work hardening
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Zusammenfassung:	•Microstructural evolution of LPBF 304 L SS at all length scales during annealing was comprehensively investigated.•As-built samples contained the square lattice distortion networks composed of orthogonal strain ripples using HRTEM.•High annealing temperature resulted in the unidirectional dislocation migration, which destroyed the as-built square lattice distortion networks.•TKD results disclosed that the local misorientation ranges of cellular interior, cellular walls, and newly formed subgrain boundaries were
ISSN:	0749-6419 1879-2154
DOI:	10.1016/j.ijplas.2022.103335