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Microstructural and...
Microstructural and mechanical evaluation of a cr-mo-v cold-work tool steel produced via electron beam melting (Ebm)
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- Botero, Carlos Alberto (author)
- Mittuniversitetet,Institutionen för kvalitets- och maskinteknik,Sports Tech Research Centre
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Şelte, A. (author)
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Ramsperger, M. (author)
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Maistro, G. (author)
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- Koptyug, Andrey, 1956- (author)
- Mittuniversitetet,Institutionen för kvalitets- och maskinteknik,Sports Tech Research Centre
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- Bäckström, Mikael, 1963- (author)
- Mittuniversitetet,Institutionen för kvalitets- och maskinteknik,Sports Tech Research Centre
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- Sjöström, William (author)
- Mittuniversitetet,Institutionen för kvalitets- och maskinteknik,Sports Tech Research Centre
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- Rännar, Lars-Erik, 1973- (author)
- Mittuniversitetet,Institutionen för kvalitets- och maskinteknik,Sports Tech Research Centre
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(creator_code:org_t)
- 2021-05-31
- 2021
- English.
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In: Materials. - : MDPI AG. - 1996-1944. ; 14:11
- Related links:
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https://doi.org/10.3...
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https://www.mdpi.com...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- In this work, a highly alloyed cold work tool steel, Uddeholm Vanadis 4 Extra, was manufactured via the electron beam melting (EBM) technique. The corresponding material microstructure and carbide precipitation behavior as well as the microstructural changes after heat treatment were characterized, and key mechanical properties were investigated. In the as-built condition, the mi-crostructure consists of a discontinuous network of very fine primary Mo-and V-rich carbides dispersed in an auto-tempered martensite matrix together with ≈15% of retained austenite. Adjusted heat treatment procedures allowed optimizing the microstructure by the elimination of Mo-rich carbides and the precipitation of fine and different sized V-rich carbides, along with a decrease in the retained austenite content below 2%. Hardness response, compressive strength, and abrasive wear properties of the EBM-manufactured material are similar or superior to its as-HIP forged counterparts manufactured using traditional powder metallurgy route. In the material as built by EBM, an impact toughness of 16–17 J was achieved. Hot isostatic pressing (HIP) was applied in order to further increase ductility and to investigate its impact upon the microstructure and properties of the material. After HIPing with optimized protocols, the ductility increased over 20 J.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Keyword
- Additive manufacturing
- Carbides
- Cold work
- Electron beam melting
- Hardness
- Mechanical properties
- Tool steel
Publication and Content Type
- ref (subject category)
- art (subject category)
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