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Influence of homogenisation treatments on the hot ductility of cast ATI® 718Plus®: Effect of niobium and minor elements on liquation characteristics
Chalmers University of Technology, Department of Industrial and Materials Science, Gothenburg, SE-41296, Sweden.
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT). (PTW)ORCID-id: 0000-0002-1607-9177
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för svetsteknologi (SV). (PTW)ORCID-id: 0000-0001-9065-0741
2021 (engelsk)Inngår i: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 799, artikkel-id 140151Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

homogenisation heat treatments. The hot ductility deteriorated significantly after long-dwell homogenisation heat treatments for 24 h at temperatures of 1120 and 1190 °C as compared with those treated at a short dwell time of 4 h at the same temperatures. The observed ductility deterioration was related to more extensive liquation along the grain boundaries caused by different mechanisms, e.g., liquation by solute segregation mechanism, Laves melting, constitutional liquation of MC carbides and supersolidus grain boundary melting, with the effect and extent depending on the solute changes after the homogenisation heat treatments. Furthermore, the role of Nb as the solute element and as the precipitate former, as well as the effect of minor alloying elements segregating along the grain boundaries, is discussed in connection to grain boundary liquation, which contributes to a better understanding of heat-affected zone liquation cracking susceptibility of cast ATI® 718Plus®. © 2020 The Authors

sted, utgiver, år, opplag, sider
2021. Vol. 799, artikkel-id 140151
Emneord [en]
Alloying elements; Carbides; Deterioration; Grain boundaries; Heat affected zone; Heat treatment; Melting; Niobium, Boundary liquation; Constitutional liquation; Different mechanisms; Effect of niobium; Grain-boundary melting; Liquation cracking; Solute segregation; Thermomechanical simulator, Ductility
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URN: urn:nbn:se:hv:diva-15809DOI: 10.1016/j.msea.2020.140151ISI: 000587907300001Scopus ID: 2-s2.0-85090044280OAI: oai:DiVA.org:hv-15809DiVA, id: diva2:1466896
Forskningsfinansiär
European Regional Development Fund (ERDF)Tilgjengelig fra: 2020-09-14 Laget: 2020-09-14 Sist oppdatert: 2022-03-30bibliografisk kontrollert

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Hanning, FabianAndersson, Joel

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