dc.contributor.author | Marioara, Calin Daniel | |
dc.contributor.author | Friis, Jesper | |
dc.contributor.author | Hersent, Emmanuel | |
dc.contributor.author | Oskarsson, Anders | |
dc.date.accessioned | 2020-11-13T14:01:05Z | |
dc.date.available | 2020-11-13T14:01:05Z | |
dc.date.created | 2019-04-30T13:20:05Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Materials Characterization. 2019, 149 218-225. | en_US |
dc.identifier.issn | 1044-5803 | |
dc.identifier.uri | https://hdl.handle.net/11250/2687858 | |
dc.description.abstract | During manufacturing of heat exchangers, the core material is cladded with a lower-melting point alloy, rolled into thin strips before being formed and finally brazed at an elevated temperature. After a period of natural aging, the final product is operated at two different temperatures depending on the application: about 95 °C for radiators, and peaks up to about 250 °C for charge-air-coolers. For an Al-Mg-Si-Cu alloy type core material, this process translates into solution heat treatment, natural aging and aging during operation. High-resolution imaging with aberration corrected high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) revealed the presence of a complex mix of precipitates after 58 days at 95 °C, including a never-before-reported phase which structurally is a mix between Al-Cu and Al-Mg-Si type precipitates. The stability of this phase is investigated with density functional theory (DFT). Q' is the main phase observed after 5 h at 250 °C, with most precipitates incorporating a certain type of stacking fault. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.subject | Heat exchangers | en_US |
dc.subject | Precipitate crystal structure | en_US |
dc.subject | Al-Mg-Si alloy | en_US |
dc.subject | Transmission electron microscopy (TEM) | en_US |
dc.title | A transmission electron microscopy study of precipitate phases that form during operation in a heat exchanger alloy | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © 2019 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/BY-NC-ND/4.0/). | en_US |
dc.source.pagenumber | 218-225 | en_US |
dc.source.volume | 149 | en_US |
dc.source.journal | Materials Characterization | en_US |
dc.identifier.doi | 10.1016/j.matchar.2019.01.035 | |
dc.identifier.cristin | 1694757 | |
dc.relation.project | Norges forskningsråd: nn9158k | en_US |
dc.relation.project | Norges forskningsråd: 197405 | en_US |
cristin.unitcode | 7401,80,64,0 | |
cristin.unitname | Materialer og nanoteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |