Delayed deformation-induced martensite transformation and enhanced cryogenic tensile properties in laser additive manufactured 316L austenitic stainless steel

Karthik, G.M.; Kim, Eun Seong; Sathiyamoorthi, Praveen; Zargaran, Alireza; Jeong, Sang Guk; Xiong, Renlong; Kang, Suk Hoon; Cho, Jung‐Wook; Kim, Hyoung Seop

doi:10.1016/j.addma.2021.102314

Cited by 20 publications

(5 citation statements)

References 64 publications

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“…1(d). This SHR is consistent with previous studies that show presence of twinning, as obtained by Karthik et al [22].…”

Section: Resultssupporting

confidence: 94%

On the Development of Twinning-Induced Plasticity in Additively Manufactured 316l Stainless Steel

Della Crociata,

Maskery,

Hague

et al. 2023

Preprint

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“…1(d). This SHR is consistent with previous studies that show presence of twinning, as obtained by Karthik et al [22].…”

Section: Resultssupporting

confidence: 94%

On the Development of Twinning-Induced Plasticity in Additively Manufactured 316l Stainless Steel

Della Crociata,

Maskery,

Hague

et al. 2023

Preprint

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“…53 Compared with its wrought version, the L-PBF steel presents indeed a different microstructure, given its biphasic nature consisting of small columns of austenite with the presence of delta ferrite at grain boundaries. In this regard, and as also reported by other studies, [54][55][56] the austenite phase of L-PBF steel has a higher stability and tends to prevent secondary hardening to appear. Likely, the presence of both delta ferrite at grain boundaries and small-sized columns of austenite hinders the martensitic transformation of the austenite.…”

Section: Cyclic Stress Responsesupporting

confidence: 81%

Strain‐controlled fatigue loading of an additively manufactured AISI 316L steel: Cyclic plasticity model and strain–life curve with a comparison to the wrought material

Pelegatti

Benasciutti

Bona

et al. 2023

Fatigue Fract Eng Mat Struct

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Low cycle fatigue (LCF) regime was experimentally studied for a 316L steel additively manufactured by laser‐powder bed fusion (L‐PBF), a material widely used in sectors that require a reliable durability analysis. Material cyclic elastoplastic behavior is described by the Chaboche–Voce combined plasticity model, which displayed a great degree of accuracy. The fatigue life was modeled by both invoking the Manson–Coffin curve and other simplified models derived from static properties of the material; some of which showed remarkably good accuracy. A quantitative comparison with a wrought‐processed 316L steel displayed a markedly different cyclic elastoplastic response but comparable fatigue strengths.

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“…[37] Kumar et al [44] reported transformationinduced plasticity (TRIP) in S304L steel. However, Karthik et al [45] documented a retarded TRIP effect and the presence of δ ferrite in additively manufactured S316L. These contradictory results let us in the present case to investigate the presence of martensite using EBSD.…”

Section: Resultsmentioning

confidence: 83%

Influence of Hatch Strategy on Crystallographic Texture Evolution, Mechanical Anisotropy of Laser Beam Powder Bed Fused S316L Steel

et al. 2022

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The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are not fully understood yet. In this contribution, three different hatch strategies are used to fabricate rod‐like samples from S316L stainless steel, which are further investigated using synchrotron diffraction, optical microscopy, and tensile tests. The results indicate the presence of ⟨110⟩ biaxial and fiber textures, whose sharpness depends on the applied hatch strategy. Mechanical tests reveal a strong correlation of the samples’ response to the observed anisotropy in the plane perpendicular to the build direction. Even though the average yield and ultimate tensile strengths of around 475 and 500 MPa, respectively, do not differ significantly, the stress–strain behavior can be correlated with the observed in‐plane anisotropy. Particularly, twinning‐induced plasticity, a distinct increase of the work hardening rate at larger strains and elliptical necking are observed in some samples with biaxial (Goss) texture. These findings indicate that texture design by means of applying dedicated hatch strategies can be used to effectively tune the multiaxial deformation behavior of components produced by laser powder bed fusion.

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Delayed deformation-induced martensite transformation and enhanced cryogenic tensile properties in laser additive manufactured 316L austenitic stainless steel

Cited by 20 publications

References 64 publications

On the Development of Twinning-Induced Plasticity in Additively Manufactured 316l Stainless Steel

On the Development of Twinning-Induced Plasticity in Additively Manufactured 316l Stainless Steel

Strain‐controlled fatigue loading of an additively manufactured AISI 316L steel: Cyclic plasticity model and strain–life curve with a comparison to the wrought material

Influence of Hatch Strategy on Crystallographic Texture Evolution, Mechanical Anisotropy of Laser Beam Powder Bed Fused S316L Steel

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