ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Vibrating the slope during cooling slope casting of a metallic alloy has shown helpful forcausing the microstructure more spherical and thinner in a previous research by the present authors.This paper gives results from a direct observation of the SSM microstructure formation duringcooling slope casting of an NH4Cl-H2O alloy with vibrating the slope. It is found that the vibrationexerted to the slope can break down the solidification shell formed at the surface of the slopethrough rapid chilling and produce effectively fine globular grains in the microstructures. The mainfactors affecting the fine grain formation include the chilling extent, frequency and amplitude of thevibration of the slope, and the superheat of the alloy melt, respectively. The higher vibrationfrequency and amplitude, the lower superheat of the alloy melt, and the lower chilling temperaturewill help the formation of finer globular grains
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.193.pdf