dc.contributor.author | Qian, Feng | |
dc.contributor.author | Jin, Shenbao | |
dc.contributor.author | Sha, Gang | |
dc.contributor.author | Li, Yanjun | |
dc.date.accessioned | 2019-03-20T15:02:22Z | |
dc.date.available | 2019-03-20T15:02:22Z | |
dc.date.created | 2018-09-06T23:25:11Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Acta Materialia. 2018, 157 114-125. | nb_NO |
dc.identifier.issn | 1359-6454 | |
dc.identifier.uri | http://hdl.handle.net/11250/2590934 | |
dc.description.abstract | The dispersion hardening effect of Mn(Fe)-containing dispersoids in aluminium alloys has long been ignored since it is difficult to achieve a high number density of fine dispersoids with conventional alloying compositions. This work demonstrates a minor addition of Cd (0.05 at.%) can dramatically enhance the precipitation of α-Al(Mn,Fe)Si dispersoids and therefore the dispersion strengthening of AA3003 alloy. Similar to the 3003 base alloy, a peak hardness in the Cd-containing alloy was obtained after continuous heating to 450 °C. However, an improvement in yield strength by 25% was achieved by the Cd addition. Detailed transmission electron microscopy (TEM) and atom probe tomography (APT) investigations show that the Cd addition has changed the nucleation behaviour of α-Al(Mn,Fe)Si dispersoids from the conventional heterogeneous nucleation on dislocations to a more homogeneous manner. It is found that a high number density of Al-Cd nanoprecipitates formed during heating between 150 and 250 °C. These Al-Cd precipitates attracted Mn and Si atoms to form Mn,Si-rich clusters in/around them, which acted as the precursors for the later nucleation of α-Al(Mn,Fe)Si dispersoids at ∼300 °C. As a result, the number density of dispersoids formed in the Cd-containing alloy after heating to 350–450 °C is about twice as that in the base alloy subjected to the same heat treatment. This work proposes a new approach to enhance the nucleation of α-Al(Mn,Fe)Si dispersoids, which can help to further develop cheap Mn(Fe)-containing dispersoid-strengthened aluminium alloys for high-temperature applications. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Enhanced dispersoid precipitation and dispersion strengthening in an Al alloy by microalloying with Cd | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.pagenumber | 114-125 | nb_NO |
dc.source.volume | 157 | nb_NO |
dc.source.journal | Acta Materialia | nb_NO |
dc.identifier.doi | 10.1016/j.actamat.2018.07.001 | |
dc.identifier.cristin | 1607471 | |
dc.description.localcode | © 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 3.7.2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | nb_NO |
cristin.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | preprint | |
cristin.qualitycode | 2 | |