On the relationship between inclusions and pores, Part II: Dendritic structure, pressure drop in the liquid and pore precipitation
2014 (English)In: 6th International Conference on Solidification and Gravity, 2014, Vol. 790-791, 302-307 p.Conference paper (Refereed)
There is a relationship between pores and inclusions. Inclusions and pores are both formed during solidification inside the interdendritic melt. As hypothesis goes, porosity moves to absorb inclusions and form clusters. Focus of this paper is how solidified dendritic structure affects pore precipitation in austenitic stainless steel. Steel sample is a continuously cast bloom. Temperature profile and width of the mushy zone of the strand is modeled according to a constant temperature at the strands surface. Thermal analysis has been performed with differential thermal analysis (DTA) and differential scanning calorimeter (DSC). Primary dendrite arm spacing (PDAS) is measured with light optical microscopy (LOM) and scanning electron microscopy (SEM). PDAS is represented as the weight average of the distance between parallel sets of primary dendrite stems. Pressure field is calculated based on Darcy's law. Pore formation is described through segregation of the gas components and pressure field in the liquid.
Place, publisher, year, edition, pages
2014. Vol. 790-791, 302-307 p.
, 6th International Conference on Solidification and Gravity, ISSN 0255-5476
Porosity, Pressure, Segregation, Solidification, Surface, Austenitic stainless steel, Continuous casting, Differential scanning calorimetry, Differential thermal analysis, Liquids, Scanning electron microscopy, Segregation (metallography), Surfaces, Constant temperature, Dendritic structures, Differential scanning calorimeters, Differential thermal analyses (DTA), Light optical microscopies, Primary dendrite, Primary dendrite arm spacings, Temperature profiles, Surface segregation
IdentifiersURN: urn:nbn:se:kth:diva-167554DOI: 10.4028/www.scientific.net/MSF.790-791.302ScopusID: 2-s2.0-84901408673ISBN: 9783038350934OAI: oai:DiVA.org:kth-167554DiVA: diva2:818210
2 September 2013 through 5 September 2013, Miskolc, Lillafured
QC 201506082015-06-082015-05-222015-09-30Bibliographically approved