publication . Thesis . 2011

Development of Niobium Boron grain retainer for aluminium silicon alloys

Nowak, Magdalena;
Open Access English
  • Published: 01 Jan 2011
  • Country: United Kingdom
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University Aluminium castings with a large grain structure have poor mechanical properties which are primarily due to casting defects as opposed to fine grain structure. The grain refinement practice using chemical addition is well established for wrought alloys, however in the case of casting alloys, the practice of adding grain refiners and the impact on castability is not well established. The addition of well known Al-5Ti-B grain refiner to casting alloys with silicon (Si) content above 3 wt.% is not effective. This is believed to be due to the chemical reaction between Ti...
free text keywords: Grain refiner, Al-si alloys, Al-No-B master alloy
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