Exploring structural origins responsible for the exceptional mechanical property of additively manufactured 316L stainless steel via in-situ and comparative investigations

An, Dayong; Zhou, Yuhao; Liu, Xinxi; Wang, Haoliang; Li, Shilei; Xiao, Yao; Li, Rui; Li, Xifeng; Han, Xianhong; Chen, Jun

doi:10.1016/j.ijplas.2023.103769

Cited by 15 publications

(2 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average grain sizes of Face 1, Face 2, and Face 3 are 35.0 µm, 52.8 µm, and 27.9 µm, respectively. The dislocation structure is extremely important in adjusting the plastic deformation behavior of the sample [33]. The average orientation deviation can reflect the dislocation density [15].…”

Section: Microstructural Studymentioning

confidence: 99%

“…Therefore, we believe that the anisotropy of the mechanical properties of Face 1 and Face 2 are attributed to the presence of texture and columnar crystals in the sample. The dislocation structure is extremely important in adjusting the plastic deformation behavior of the sample [33]. The average orientation deviation can reflect the dislocation density [15].…”

Section: Microstructural Studymentioning

confidence: 99%

See 1 more Smart Citation

An Investigation of the Anisotropic Mechanical Properties of Additive-Manufactured 316L SS with SLM

Wang,

Jiang,

Yang

et al. 2024

Materials

View full text Add to dashboard Cite

Selective laser melting (SLM) forms specimens that often exhibit anisotropic mechanical properties. Most existing research only explains that the mechanical properties of specimens perpendicular to the build direction are superior to those parallel to the build direction. In this paper, the mechanical properties of SLM 316L SS specimens with different surfaces and different directions are compared. Finally, it was found that the mechanical properties of specimens on Face 3 are stronger than those on Face 1 and Face 2, while the mechanical properties of specimens on Face 1 and Face 2 are similar. For specimens in different directions on the same surface, the mechanical properties of Face 1 and Face 2 exhibit clear anisotropy, while the mechanical properties of Face 3 tend to be isotropic. In this paper, the EBSD technique was used to analyze the specimens. It was found that the anisotropy of the mechanical properties of Face 1 and Face 2 are attributed to the presence of texture and columnar crystals in the sample. This paper can provide accurate and reliable material performance data for the practical application of SLM 316L SS, thereby guiding the optimization of engineering design and manufacturing processes.

show abstract

Section: Microstructural Studymentioning

confidence: 99%

Section: Microstructural Studymentioning

confidence: 99%

An Investigation of the Anisotropic Mechanical Properties of Additive-Manufactured 316L SS with SLM

Wang,

Jiang,

Yang

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

The Role of Dislocation Type in the Thermal Stability of Cellular Structures in Additively Manufactured Austenitic Stainless Steel

An,

Xiao,

et al. 2024

Advanced Science

View full text Add to dashboard Cite

The ultrafine cellular structure promotes the extraordinary mechanical performance of metals manufactured by laser powder‐bed‐fusion (L‐PBF). An in‐depth understanding of the mechanisms governing the thermal stability of such structures is crucial for designing reliable L‐PBF components for high‐temperature applications. Here, characterizations and 3D discrete dislocation dynamics simulations are performed to comprehensively understand the evolution of cellular structures in 316L stainless steel during annealing. The dominance of screw‐type dislocation dipoles in the dislocation cells is reported. However, the majority of dislocations in sub‐grain boundaries (SGBs) are geometrically necessary dislocations (GNDs) with varying types. The disparity in dislocation types can be attributed to the variation in local stacking fault energy (SFE) arising from chemical heterogeneity. The presence of screw‐type dislocations facilitates the unpinning of dislocations from dislocation cells/SGBs, resulting in a high dislocation mobility. In contrast, the migration of SGBs with dominating edge‐type GNDs requires collaborative motion of dislocations, leading to a sluggish migration rate and an enhanced thermal stability. This work emphasizes the significant role of dislocation type in the thermal stability of cellular structures. Furthermore, it sheds light on how to locally tune dislocation structures with desired dislocation types by adjusting local chemistry‐dependent SFE and heat treatment.

show abstract

Determining the microstructure effects on the stress corrosion cracking initiation behavior of laser powder-bed-fusion printed 304L stainless steel in high-temperature hydrogenated water

Zhang,

Wang,

Hou

et al. 2024

Corrosion Science

View full text Add to dashboard Cite

Exploring structural origins responsible for the exceptional mechanical property of additively manufactured 316L stainless steel via in-situ and comparative investigations

Cited by 15 publications

References 78 publications

An Investigation of the Anisotropic Mechanical Properties of Additive-Manufactured 316L SS with SLM

An Investigation of the Anisotropic Mechanical Properties of Additive-Manufactured 316L SS with SLM

The Role of Dislocation Type in the Thermal Stability of Cellular Structures in Additively Manufactured Austenitic Stainless Steel

Determining the microstructure effects on the stress corrosion cracking initiation behavior of laser powder-bed-fusion printed 304L stainless steel in high-temperature hydrogenated water

Contact Info

Product

Resources

About