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Wire laser metal de...
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Baghdadchi, Amir,1994-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW
(författare)
Wire laser metal deposition of 22% Cr duplex stainless steel : as-deposited and heat-treated microstructure and mechanical properties
- Artikel/kapitelEngelska2022
Förlag, utgivningsår, omfång ...
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2022-01-19
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Springer Science and Business Media LLC,2022
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electronicrdacarrier
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LIBRIS-ID:oai:DiVA.org:hv-18106
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https://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-18106URI
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https://doi.org/10.1007/s10853-022-06878-6DOI
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Språk:engelska
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Sammanfattning på:engelska
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Duplex stainless steel (DSS) blocks with dimensions of 150 × 70x30 mm3 were fabricated by Laser Metal Deposition with Wire (LMDw). Implementation of a programmable logic control system and the hot-wire technology provided a stable and consistent process producing high-quality and virtually defect-free deposits. Microstructure and mechanical properties were studied for as-deposited (AD) material and when heat-treated (HT) for 1 h at 1100 °C. The AD microstructure was inhomogeneous with highly ferritic areas with nitrides and austenitic regions with fine secondary austenite occurring in a periodic manner. Heat treatment produced a homogenized microstructure, free from nitrides and fine secondary austenite, with balanced ferrite and austenite fractions. Although some nitrogen was lost during LMDw, heat treatment or reheating by subsequent passes in AD allowed the formation of about 50% austenite. Mechanical properties fulfilled common requirements on strength and toughness in both as-deposited and heat-treated conditions achieving the highest strength in AD condition and best toughness and ductility in HT condition. Epitaxial ferrite growth, giving elongated grains along the build direction, resulted in somewhat higher toughness in both AD and HT conditions when cracks propagated perpendicular to the build direction. It was concluded that high-quality components can be produced by LMDw and that deposits can be used in either AD or HT conditions. The findings of this research provide valuable input for the fabrication of high-performance DSS AM components
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Valiente Bermejo, María Asunción,1972-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW(Swepub:hv)asuval
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Axelsson, BjörnAlfa Laval Tumba AB, Tumba (SWE)
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Harati, Ebrahim,1986-Högskolan Väst,Avdelningen för svetsteknologi (SV),ITW Welding AB, Partille (SWE),PTW(Swepub:hv)ebrhar
(författare)
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Högström, MatsHögskolan Väst,Avdelningen för svetsteknologi (SV),PTW(Swepub:hv)tmhs
(författare)
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Karlsson, Leif,1956-Högskolan Väst,Avdelningen för svetsteknologi (SV)(Swepub:hv)leikar
(författare)
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Högskolan VästAvdelningen för svetsteknologi (SV)
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Materials Science: Springer Science and Business Media LLC57:21, s. 9556-95750022-24611573-4803
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