Investigation of the effect of holding time and melt stirring on the grain refinement of an A206 alloy
MATERIALI IN TEHNOLOGIJE, vol.50, no.3, pp.433-437, 2016 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 50 Issue: 3
- Publication Date: 2016
- Journal Name: MATERIALI IN TEHNOLOGIJE
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.433-437
- Gazi University Affiliated: Yes
Abstract
Effects of melt stirring and holding time were studied with an Al-4.5 % of mass fractions of Cu (A206) alloy. The optimum
level of a grain refiner was determined in conjunction with both continuously stirred and non-stirred melts during the holding
time. Results showed that a mass fraction of a Ti addition of as low as 0.03 % was sufficient to obtain the 82 μm average grain
size, while a Ti addition exceeding the mass fraction of 0.03 % showed no significant effect on the grain size of castings. The
grain refinement tends to fade with a long holding time in a non-stirred liquid. The results also showed that an effective grain
refinement of the A206 alloy can be achieved with a long holding time as long as the liquid alloy is continually stirred.
Keywords: grain refinement, melt stirring, holding time, Al-4.5Cu alloy, A206 alloy