Microstructure and grain growth inhomogeneity in austenitic steel produced by wire-feed electron beam melting: the effect of post-building solid-solution treatment

Астафурова, Е. Г.; Panchenko, M. Yu.; Moskvina, Valentina; Maier, Galina; Астафуров, С. В.; Melnikov, E.; Fortuna, A. S.; Reunova, K. A.; Рубцов, В. Е.; Колубаев, Е. А.

doi:10.1007/s10853-020-04424-w

Cited by 37 publications

(30 citation statements)

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“…The appearance of δ-ferrite is associated with the variation in chemical composition of the wire during deposition (Ni depletion) and the features of the EBAM process (thermal history and cooling rate). The solidification mode and morphology of austenite and ferrite in Cr-Ni stainless steels is governed by the cooling rate and Creq/Nieq ratio [8] and, for our EBAM-produced steel, they have been earlier described in detail in [5].…”

Section: Methodsmentioning

confidence: 99%

“…The thickness of δ-ferrite lamellae varies in the interval 0.5-1.5 μm. A full description of the grain structure and phase composition of this EBAM-fabricated steel can be found in our previous work [5]. The appearance of δ-ferrite is associated with the variation in chemical composition of the wire during deposition (Ni depletion) and the features of the EBAM process (thermal history and cooling rate).…”

Section: Methodsmentioning

confidence: 99%

“…There is a lot of data in the literature on the inhomogeneous, anisotropic structure of austenitic steel obtained by the AM methods. Wang et al [3] have reported that laser-based DED AM 304L steel is characterized by the coarse columnar structure and by the significant anisotropy of mechanical properties, and such peculiarities are typical for austenitic steels fabricated by AM [4,5]. Due to rapid cooling and complex thermal history of the AM-billets, a δ-ferrite is observed in AM austenitic steels [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al [3] have reported that laser-based DED AM 304L steel is characterized by the coarse columnar structure and by the significant anisotropy of mechanical properties, and such peculiarities are typical for austenitic steels fabricated by AM [4,5]. Due to rapid cooling and complex thermal history of the AM-billets, a δ-ferrite is observed in AM austenitic steels [5][6][7]. Chen et al [7] have pointed out that the brittle sigma phase arises in 316L stainless steel fabricated by gas metal arc AM.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al [7] have pointed out that the brittle sigma phase arises in 316L stainless steel fabricated by gas metal arc AM. The complex inhomogeneous heterophase structure of AM austenitic steels leads to a change in their basic mechanical properties in comparison with conventional cast material [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Hydrogen-Charging on Mechanical Properties of Austenitic CrNi Steel Fabricated by Wire-Feed Electron Beam Additive Manufacturing

et al. 2021

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A comparative study of the mechanical properties, fracture mechanisms and hydrogen embrittlement peculiarities was carried out using the specimens of austenitic CrNi steel produced by two different methods: wire-feed electron beam additive manufacturing and conventional casting followed by solid-solution treatment. Hydrogen-induced reduction of ductility and the increase in the yield strength are observed in steel specimens produced by both methods. Despite hydrogen embrittlement index is comparable in them, the increase in the yield strength after hydrogen-charging is different: 25 MPa for cast steel and 175 MPa for additively manufactured steel. This difference is associated with the peculiarities of phase composition and phase distribution in steels produced by different methods.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%