Effect of titanium additions on the microstructure of DC-cast aluminium alloys
2005 (English)In: Materials Science and Engineering A, ISSN 0921-5093, Vol. 413-414, 277-282 p.Article in journal (Refereed) Published
The effect of the Ti content on the solidification structures of aluminum alloys of AA3003 type was investigated. Some improved corrosion properties can be obtained from increasing the Ti contents in aluminium alloys to a level above the normal practice for grain refinement. However, increasing the Ti content above the peritectic point, 0.15%, can influence the grain refinement and cause casting difficulties. The investigation was made by both characterizing the grain structure over the width of DC-cast rolling ingots of different alloys, and by studying the solidification microstructure of Bridgman directional solidified samples, grown to simulate ingot solidification. Structure properties such as grain size, distances between secondary phases and microstructure coarsening were studied. It was found that with normal Ti contents in the range of 0.015%, the grain refinement is effective. However, upon larger Ti additions to levels around 0.15% the grain structure becomes coarser.
Place, publisher, year, edition, pages
2005. Vol. 413-414, 277-282 p.
aluminium, titanium, wrought alloys, directional solidification, grain size, microstructure
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-6498DOI: 10.1016/j.msea.2005.09.006ISI: 000234202900045OAI: oai:DiVA.org:kth-6498DiVA: diva2:11226
QC 201009012006-12-052006-12-052010-12-06Bibliographically approved