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Effect of Direct En...
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Sreekanth, SuhasHögskolan Väst,Avdelningen för svetsteknologi (SV),PTW,Department of Engineering Science, University West, Trollhättan, Sweden
(author)
Effect of Direct Energy Deposition Process Parameters on Single-Track Deposits of Alloy 718
- Article/chapterEnglish2020
Publisher, publication year, extent ...
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2020-01-07
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MDPI AG,2020
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Numbers
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LIBRIS-ID:oai:DiVA.org:hv-14922
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https://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-14922URI
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https://doi.org/10.3390/met10010096DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-47590URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The effect of three important process parameters, namely laser power, scanning speed and laser stand-off distance on the deposit geometry, microstructure and segregation characteristics in direct energy deposited alloy 718 specimens has been studied. Laser power and laser stand-off distance were found to notably affect the width and depth of the deposit, while the scanning speed influenced the deposit height. An increase in specific energy conditions (between 0.5 J/mm2 and 1.0 J/mm2) increased the total area of deposit yielding varied grain morphologies and precipitation behaviors which were comprehensively analyzed. A deposit comprising three distinct zones, namely the top, middle and bottom regions, categorized based on the distinct microstructural features formed on account of variation in local solidification conditions. Nb-rich eutectics preferentially segregated in the top region of the deposit (5.4–9.6% area fraction, Af) which predominantly consisted of an equiaxed grain structure, as compared to the middle (1.5–5.7% Af) and the bottom regions (2.6–4.5% Af), where columnar dendritic morphology was observed. High scan speed was more effective in reducing the area fraction of Nb-rich phases in the top and middle regions of the deposit. The <100> crystallographic direction was observed to be the preferred growth direction of columnar grains while equiaxed grains had a random orientation.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Hurtig, Kjell,1960-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW,Department of Engineering Science, University West, Trollhättan, Sweden(Swepub:hv)tkh
(author)
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Joshi, Shrikant V.,1960-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW,Department of Engineering Science, University West, Trollhättan, Sweden(Swepub:hv)shrjos
(author)
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Andersson, Joel,1981-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW,Department of Engineering Science, University West, Trollhättan, Sweden(Swepub:hv)joan0056
(author)
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Ghassemali, Ehsan,1983-Jönköping University,JTH, Material och tillverkning(Swepub:hj)GhaEhs
(author)
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Högskolan VästAvdelningen för svetsteknologi (SV)
(creator_code:org_t)
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In:Metals: MDPI AG10:1, s. 01-162075-4701
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