Microstructural evolution and chemical corrosion of electron beam wire-feed additively manufactured AISI 304 stainless steel

Using an electron beam wire-feed additive manufacturing three sets of samples were obtained at different heat input levels. The samples contained different amounts of vermicular δ-ferrite that depended on the heat input value used. Chemical corrosion tests were carried out to find out that the corro...

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Vydáno v:Journal of alloys and compounds Ročník 803; s. 364 - 370
Hlavní autoři: Tarasov, S.Yu, Filippov, A.V., Shamarin, N.N., Fortuna, S.V., Maier, G.G., Kolubaev, E.A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Lausanne Elsevier B.V 30.09.2019
Elsevier BV
Témata:
Additive manufacturing
Austenitic stainless steels
Corrosion
Corrosion resistance
Corrosion tests
Cracks
Crystallography
Cube texture
Delta ferrite
Depletion
Electron beam
Electron beams
Ferrite
Organic chemistry
Stainless steel
Wire
Electron beam
Ferrite
Depletion
Additive manufacturing
Corrosion
Stainless steel
ISSN:0925-8388, 1873-4669
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Shrnutí:Using an electron beam wire-feed additive manufacturing three sets of samples were obtained at different heat input levels. The samples contained different amounts of vermicular δ-ferrite that depended on the heat input value used. Chemical corrosion tests were carried out to find out that the corrosion resistance of a sample is determined by the δ-ferrite amount in it. High δ-ferrite content in the sample obtained at medium used heat input value caused enhanced corrosion in the Cr-depleted austenite grains. Otherwise, when using the maximum heat input the additively manufactured sample contained the minimum amount of δ-ferrite and demonstrated the highest corrosion resistance as well as formation of a cubic crystallographic texture. No such texture was found in samples grown at lower heat input values. In addition, no inter-granular corrosion induced open cracks have been observed on all samples after 90° angle flexural test. •Wire-feed electron beam additive manufactured samples were characterized.•The amount of vermicular ferrite correlated with the heat input value.•High heat input deposition resulted in formation of a crystallographic texture.•High-ferrite sample was characterized by intense intragranular corrosion.•Flexural test showed no intergranular corrosion.
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ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.06.246