Analysis and Evaluation of Different Influencing Factors in Processing of Hollow and Full Beads by Alginate Gelation Based on Zirconia and TRIP Steel

Abstract:

A novel and innovative process for full as well as hollow metal-matrix composite bead fabrication using gel-casting process by alginate gelation is investigated. In particular the influence of four different alginates and various solidifying agents have been investigated regarding the formation and stability of full and hollow beads. The suspension contained a metastable austenitic steel powder (16Cr7Mn3Ni) and zirconia particles as well as different alginates and was added dropwise into water containing different solidifying agents for forming beads. With the aid of sodium and potassium alginate dropped in solution with CaCl₂, full metal beads have been obtained. Hollow beads have been produced using potassium alginate and Ca (OH)₂ as solidifying agent and show a hollow space fraction of 65%. At lower strains (up to 15 %), all zirconia reinforced full steel beads obtain higher specific energy absorption (SEA) in comparison to pure steel beads.

• Periodical: Materials Science Forum (Volumes 825-826)
• Pages: 158-166
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.825-826.158
• Online since: July 2015
• Authors: Marie Oppelt*, Christos G. Aneziris
• Keywords: Alginate Gelation, Full Beads, Hollow Beads, Metal Matrix Composite, TRIP-Steel, Zirconia

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