Experimental evidence of liquid feeding during solidification of a steel. (15th March 2018)

• Record Type: Journal Article
• Authors: Agarwal, G.; Amirthalingam, M.; Moon, S.C.; Dippenaar, R.J.; Richardson, I.M.; Hermans, M.J.M.
• Is Part Of: Scripta materialia. Number 146(2018)
• Page Start: 105
• Page End: 109
• Publication Date: 2018-03-15
• Subjects: Solidification -- Steel -- Solidification cracking -- Hot tearing -- In-situ; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.11.003
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Sufficient liquid feeding under constrained solidification conditions like, those experienced in welding and casting, is vital to avoid solidification cracking. We present the results of unique in-situ experimental observations of liquid feeding in a solidifying steel melt pool. Liquid feeding was observed in the inter-cellular regions during the terminal stage of solidification. An average liquid flow speed of 450–500 μm s −1 was found. A pressure difference of the order of 10 4 Pa is calculated to cause the liquid flow. The rate of solidification shrinkage and the rate of deformation were found to be less than the rate of liquid feeding. Graphical Abstract: