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Microstructures of ...
Microstructures of high strength steel welding consumables from directed thermal cycles by shaped laser pulses
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- Robertson, Stephanie (författare)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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- Frostevarg, Jan, Teknologie doktor, 1982- (författare)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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- Ramasamy, Anandkumar (författare)
- Lincoln Electric Europe, Nijmegen, Netherlands
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- Kalfsbeek, Bert (författare)
- Lincoln Electric Europe, Nijmegen, Netherlands
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- Volpp, Jörg (författare)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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- Kaplan, Alexander F.H (författare)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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(creator_code:org_t)
- 2020-08-05
- 2020
- Engelska.
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Ingår i: The International Journal of Advanced Manufacturing Technology. - : Springer. - 0268-3768 .- 1433-3015. ; 109:9-12, s. 2653-2662
- Relaterad länk:
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https://link.springe...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Filler wire metallurgy was modified through temporally shaped laser pulses, controlling cooling cycles in a recently developed method. Trends were identified through efficient mapping while maintaining representative thermal cycles of welding processes. A primary pulse melted preplaced filler wires while a secondary, linearly ramped-down pulse elevated the nugget to re-austenization temperatures. Ramped-down pulses resulted in linear cooling rates comparable with and exceeding furnace-based methods, between 50 and 300∘C/s. The linear decay of laser output power guided the temperature through a regime to obtain desired microstructures. For three very high-strength steel filler wire chemistries, quenching resulted in smaller plates with cross-hatched microstructures, accompanied by grain boundary ferrite. Finer bainite microstructures started forming for fast linear temperature decay, about 250∘C/s. Slower decay or a weaker third cycle formed coarser microstructures with coalescent sheaves and less cross-hatching.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Nyckelord
- filler wire
- consumable
- welding
- thermal cycle
- microstructure
- cooling rate
- Produktionsutveckling
- Manufacturing Systems Engineering
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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