Download Statistics
Download StatisticsDavies, James Michael Taylor (2017). Effect of titanium diboride particle size on al-alloy properties. University of Birmingham. Ph.D.
|
Davies2017PhD.pdf
Text - Accepted Version Available under License All rights reserved. Download (10MB) | Preview |
Abstract
Most experimental studies which investigate aluminium alloys and TiB2 additions focus on varying the quantities of material added to the alloy. This thesis attempts to address the lack of information regarding to what effect the particle size distribution of the TiB2 additions has on an A205 alloy. To do this the TiB2 particles were removed from the A205 alloy by dissolution in hydrochloric acid. The resulting particles were then subjected to a particle size analysis procedure carried out on a Malvern Mastersizer particle size analysis machine.
Comparison of TiB2 particle size distributions collected from; as-cast A205, solution heat-treated A205, solution heat-treated and precipitation hardened A205, and Al-5Ti-1B grain refiner rod, revealed a variation between results attributed to copper contamination. In effort to purify the experimentally collected material an electrochemical refinement procedure was trialled with partial success in reducing the measured TiB2 particle size distribution collected from fully heat-treated A205. All resulting particle size distributions were combined with the measured grain size and grain to grain boundary volume fraction values, and incorporated into a predictive yield strength model. Following the measurement of Al-5Ti-1B grain refiner’s TiB2 particle size distribution, a series of TP1 grain refinement tests were conducted to investigate the effects of different TiB2 particle sizes found at both extremes of the measured grain refiner’s TiB2 particle size range. Through a series of Al-5Ti-1B settling experiments, samples containing different sizes of TiB2 were created, compositionally analysed using ICP, and used for the TP1 tests. The results of which confirmed the resulting grain sizes to be statistically different from one another.
| Type of Work: | Thesis (Doctorates > Ph.D.) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Award Type: | Doctorates > Ph.D. | |||||||||
| Supervisor(s): |
|
|||||||||
| Licence: | All rights reserved | |||||||||
| College/Faculty: | Colleges > College of Engineering & Physical Sciences | |||||||||
| School or Department: | School of Metallurgy and Materials | |||||||||
| Funders: | Other | |||||||||
| Other Funders: | Aeromet International PLC | |||||||||
| URI: | http://etheses.bham.ac.uk/id/eprint/16466 |
Actions
 |
Request a Correction |
 |
View Item |
Downloads
Downloads per month over past year