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Carbide Precipitati...
Carbide Precipitation during Processing of Two Low-Alloyed Martensitic Tool Steels with 0.11 and 0.17 V/Mo Ratios Studied by Neutron Scattering, Electron Microscopy and Atom Probe
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- Claesson, Erik (författare)
- KTH,Egenskaper,Swerim AB, Box 7047, Kista, SE-16407 Stockholm, Sweden,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Magnusson, Hans (författare)
- Swerim AB,Swerim AB, Box 7047, SE-16407 Kista, Sweden.
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- Kohlbrecher, Joachim (författare)
- Paul Scherrer Institut,Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland.
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- Thuvander, Mattias, 1968 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lindberg, Fredrik (författare)
- Swerim AB
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- Andersson, Magnus (författare)
- Swerim AB
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- Hedström, Peter, 1955- (författare)
- KTH,Egenskaper,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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(creator_code:org_t)
- 2022-04-28
- 2022
- Engelska.
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Ingår i: Metals. - Basel, Switzerland : MDPI AG. - 2075-4701. ; 12:5
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://doi.org/10.3...
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https://kth.diva-por... (primary) (Raw object)
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https://research.cha...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Two industrially processed low-alloyed martensitic tool steel alloys with compositions Fe-0.3C-1.1Si-0.81Mn-1.5Cr-1.4Ni-1.1Mo-0.13V and Fe-0.3C-1.1Si-0.81Mn-1.4Cr-0.7Ni-0.8Mo-0.14V (wt.%) were characterized using small-angle neutron scattering (SANS), scanning electron microscopy (SEM), Scanning transmission electron microscopy (STEM), and atom probe tomography (APT). The combination of methods enables an understanding of the complex precipitation sequences that occur in these materials during the processing. Nb-rich primary carbides form at hot working, while Fe-rich auto-tempering carbides precipitate upon quenching, and cementite carbides grow during tempering when Mo-rich secondary carbides also nucleate and grow. The number density of Mo-rich carbides increases with tempering time, and after 24 h, it is two to three orders of magnitude higher than the Fe-rich carbides. A high number density of Mo-rich carbides is important to strengthen these low-alloyed tool steels through precipitation hardening. The results indicate that the Mo-rich secondary carbide precipitates are initially of MC character, whilst later they start to appear as M2C. This change of the secondary carbides is diffusion driven and is therefore mainly seen for longer tempering times at the higher tempering temperature of 600◦C.
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
- STEM
- APT
- SANS
- martensite
- tool steel
- carbides
- tempering
- precipitation
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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