Effect of titanium on the microstructure of DC-cast aluminium alloys
2005 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 413, p. 277-282Article in journal (Refereed) Published
Abstract [en]
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 micro-structure of Bridgman directional solidified samples, grown to simulate ingot solidi-fication. Structure properties such as grain size, distances between secondary phases and microstructure coarsening were studied. The hardness of the alloys was also determined. 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, p. 277-282
Keywords [en]
Aluminium, Titanium, Wrought alloys, solidification
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-3383DOI: 10.1016/j.msea.2005.09.006ISI: 000234202900045Local ID: 3378OAI: oai:DiVA.org:miun-3383DiVA, id: diva2:28415
Conference
International Conference on Advances in Solidification Processes, Jun 07-10, 2005, Stockholm, Sweden
Note
International Conference on Advances in Solidification Processes, Jun 07-10, 2005, Stockholm, Sweden
2008-09-302008-09-302017-12-12Bibliographically approved