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Spinodal Decomposit...
Spinodal Decomposition in Functionally Graded Super Duplex Stainless Steel and Weld Metal
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- Hosseini, Vahid, 1987- (författare)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),Innovatum AB Trollhättan,Trollhättan,Sweden,PTW,Innovatum,University West
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- Thuvander, Mattias, 1968 (författare)
- Chalmers University of Technology, Department of Physics, Gothenburg,Sweden,PTW,Chalmers tekniska högskola
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- Wessman, Sten, 1967- (författare)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW,University West
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- Karlsson, Leif, 1956- (författare)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW,University West
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(creator_code:org_t)
- 2018-04-17
- 2018
- Engelska.
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Ingår i: Metallurgical and Materials Transactions. A. - : Springer Science and Business Media LLC. - 1073-5623 .- 1543-1940. ; 49A:7, s. 2803-2816
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Abstract
Ämnesord
Stäng
- Low-temperature phase separations (T < 500 °C), resulting in changes in mechanical and corrosion properties, of super duplex stainless steel (SDSS) base and weld metals were investigated for short heat treatment times (0.5 to 600 minutes). A novel heat treatment technique, where a stationary arc produces a steady state temperature gradient for selected times, was employed to fabricate functionally graded materials. Three different initial material conditions including 2507 SDSS, remelted 2507 SDSS, and 2509 SDSS weld metal were investigated. Selective etching of ferrite significantly decreased in regions heat treated at 435 °C to 480 °C already after 3 minutes due to rapid phase separations. Atom probe tomography results revealed spinodal decomposition of ferrite and precipitation of Cu particles. Microhardness mapping showed that as-welded microstructure and/or higher Ni content accelerated decomposition. The arc heat treatment technique combined with microhardness mapping and electrolytical etching was found to be a successful approach to evaluate kinetics of low-temperature phase separations in SDSS, particularly at its earlier stages. A time-temperature transformation diagram was proposed showing the kinetics of 475 °C-embrittlement in 2507 SDSS.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Korrosionsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Corrosion Engineering (hsv//eng)
Nyckelord
- Manufacturing and materials engineering
- Produktions- och materialteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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