Browsing by Author "Qian, Ma"
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Discussions on grain refinement of magnesium alloys by carbon inoculation
Qian, Ma; Cao, Peng (Elsevier, 2005-03)Carbon inoculation has no effect on magnesium alloys that do not contain aluminium. The hypothesis proposed in a recent article [Scripta Materialia 49 (2003) 1129] that segregation of carbon plays a major role in the grain ... -
Effect of iron on grain refinement of high-purity Mg–Al alloys
Cao, Peng; Qian, Ma; StJohn, David H. (Elsevier Ltd, 2004-07)The effect of iron on the grain refinement of high-purity Mg–3%Al and Mg–9%Al alloys has been investigated using anhydrous FeCl3 as an iron additive at 750 °C in carbon-free aluminium titanite crucibles. It was shown that ... -
Effect of manganese on grain refinement of Mg–Al based alloys
Cao, Peng; Qian, Ma; StJohn, David H. (Elsevier, 2006-06)Manganese is a grain refiner for high purity Mg–3%Al, Mg–6%Al, Mg–9%Al, and commercial AZ31 (Mg–3%Al–1%Zn) alloys when introduced in the form of an Al–60%Mn master alloy splatter but the use of pure Mn flakes and ALTAB™ ... -
Grain coarsening of magnesium alloys by beryllium
Cao, Peng; Qian, Ma; StJohn, David H. (Elsevier Ltd, 2004-10)A trace of beryllium can lead to dramatic grain coarsening in Mg–Al alloys at normal cooling rates. It is, however, unclear whether this effect applies to aluminium-free magnesium alloys or not. This work shows that a trace ... -
Mechanism for grain refinement of magnesium alloys by superheating
Cao, Peng; Qian, Ma; StJohn, David H. (Elsevier, 2007-04)The mechanisms for grain refinement of magnesium alloys by superheating have remained ambiguous since 1931. A model has been proposed on the basis of the recent understanding of the grain refinement of both high purity and ...
Co-authors for Ma Qian
Ma Qian has 3 co-authors in Research Commons.