ISSN:
1662-9779
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Physik
Notizen:
Reheating process in the semi-solid state is a very important step in the thixoformingprocess. In this research semi-solid ductile cast iron and Al alloys (Al-2.5Si, Al356) prepared byinclined plate method, were reheated to examine the effect of reheating conditions on themicrostructure and coarsening kinetics of the alloys. For ductile cast iron, solid fraction at differentreheating temperatures and holding times was obtained and based on these results the optimumreheating temperature range was determined. In the case of Al alloys increase of holding time in thesemi-solid state, leads to increase of liquid fraction, solid grain size and improvement of sphericityof solid particles. In addition, the results show that coarsening kinetics of microstructures of bothalloys during reheating was diffusion controlled and can be mostly treated by Ostwald ripeningtheory
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.205.pdf
