Intrinsic strain aging, Σ3 boundaries, and origins of cellular substructure in additively manufactured 316L

By A. Birnbaum, J. Steuben, Erin J. Barrick, A. Iliopoulos, J. Michopoulos. Additive Manufacturing, 2018

188 citations recorded by the source corpus.

The observation of sub-grained cellular features in additively manufactured (AM)/selectively laser melted (SLM) 316L stainless steel components has remained an interesting, though incompletely understood phenomenon. However, the recently observed correlation linking the presence of these features with significantly enhanced mechanical strength in SLM 316L materials has driven a renewed interest and effort toward elucidating the mechanism(s) by which they are formed. To date, the dominant hypothesis, cellular solidification followed by dislocation-solute entanglement, remains incompatible with the ensemble of reported observations from multiple independent studies. This effort offers direct evidence of a previously unrecognized interaction of phenomena, that, when acting in concert, give rise to this commonly observed substructure. These phenomena include SLM-induced intrinsic strain-aging, Cottrell atmosphere formation, and twin-boundary enhanced mass diffusion to structural defects.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/38ab528b468419cd3a95a56f98a3e4d98f15b2ec

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Automotive Engineering

1. M. Thiele
2. C. Esen
3. W. Theisen
4. A. Edelmann
5. J. Boes
6. Ralf Hellmann
7. A. Röttger

In Mechanical Engineering

1. M. Thiele
2. Zhiqiang Li
3. C. Esen
4. W. Theisen
5. A. Edelmann
6. J. Boes
7. Ralf Hellmann
8. A. Röttger

Citations in the corpus

• The origin of high-density dislocations in additively manufactured metals (2020, background): “GNDs are then ready to form to accommodate the local misorientations [8].”
• Microstructure and mechanical properties of 316L austenitic stainless steel processed by different SLM devices (2020, background): “Additionally, the shell regions were found to possess a high dislocation density [31].”