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Stress relief heat ...
Stress relief heat treatment and mechanical properties of laser powder bed fusion built 21-6-9 stainless steel
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- Edin, Emil (författare)
- Luleå tekniska universitet,Materialvetenskap,Division of Materials Science, Luleå University of Technology, Luleå (SWE)
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- Svahn, Fredrik (författare)
- GKN Aerospace Sweden AB, 46181, Trollhättan (SWE)
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- Neikter, Magnus, 1988- (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT
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- Åkerfeldt, Pia (författare)
- Luleå tekniska universitet,Materialvetenskap,Division of Materials Science, Luleå University of Technology, Luleå (SWE)
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(creator_code:org_t)
- Elsevier, 2023
- 2023
- Engelska.
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Ingår i: Materials Science and Engineering A. - : Elsevier. - 0921-5093 .- 1873-4936. ; 868
- Relaterad länk:
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https://doi.org/10.1...
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https://ltu.diva-por... (primary) (Raw object)
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https://hv.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- In this work, the effectiveness of residual stress relief annealing on a laser powder bed fusion (L-PBF) manufactured austenitic stainless steel, alloy 21-6-9 was investigated. Residual stress levels were gauged using geometrical distortion and relaxation testing results. In the investigated temperature interval (600–850 °C), shape stability was reached after subjecting the as-built material to an annealing temperature of 850 °C for 1 h. Microstructural characterization and tensile testing were also performed for each annealing temperature to evaluate the alloy's thermal stability and the resulting tensile properties. In the as-built state, a yield strength (YS) of 640 MPa, ultimate tensile strength (UTS) of 810 MPa and 4D elongation of 47% were measured. Annealing at 850 °C for 1 h had little measurable effect on ductility (48% 4D elongation) while still having a softening effect (UTS = 775 MPa, YS = 540 MPa). From the microstructural characterization, cell-like features were observed sporadically in the annealed condition and appeared stable up until 800 °C after which gradual dissolution began, with the last remnants disappearing after subjecting the material to 900 °C for 1 h.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Nyckelord
- Laser powder bed fusion
- stainless steel
- residual stress
- heat treatment
- tensile testing
- relaxation testing
- Engineering Materials
- Materialteknik
- Production Technology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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