Department of Chemical and Materials EngineeringUniversity of AlbertaMat E 362

Lily (Xiaojun) Ren

Brief Overview of Presentation:Brittle Fracture of Hull Steel at Low Temperatures

InstructorDr. Stojan Djoki

Winter Semester, 2015Link for PowerPoint: https://prezi.com/4o1qmrdnepns/Created by: Xiaojun (Lily) RenBrief Overview of Presentation: The Titanic and what is it made of? Steel rivets and hull plates with background information Harland & Wolff Machined and made by hand What caused the failure? Comparison to modern Steel: AISI1018 and A36 Metallography Charpy test results Tensile strength Tensile test results of hull plates recovered in 1991 and 1996 Material Microstructure SEM Chemical Composition Low manganese to sulfur ratio Addition Information (if time allows) Architecture faults Stress Concentrations Cracks at Rivet Holes Plate Variability Effect of loading Rate Conclusion Adequate in strength Low fracture toughness at ice brine temperature due to a complex combination of factors How to fix this problem Heat-treat the steel to improve material properties

References[1] - McCarty, Jennifer Hooper, and Tim Foecke.What Really Sank the Titanic: New Forensic Discoveries. New York: Citadel, 2008. Print.[2] - Foecke, Timothy J. "Metallurgy of the RMS Titanic." NIST Interagency/Internal Report (NISTIR) - 6118 (1998): National Institute of Standards and Technology, 01 Feb. 1998. Web. [3] - "What Really Sank the Titanic?" Materials Today, n.d. Web. [4] - Gannon, Robert. "What Really Sank the Titanic." Popular Science Feb. 1995: 49-55. Popular Science. Web.