2017 Technical Division Young Professional Poster Competition: Light Metals Division (LMD)
Sponsored by: TMS Extraction and Processing Division, TMS Functional Materials Division, TMS Light Metals Division, TMS Materials Processing and Manufacturing Division, TMS Structural Materials Division
Program Organizers: TMS Administration

Monday 6:00 PM
February 27, 2017
Room: Hall B1
Location: San Diego Convention Ctr

YP-3: Effect of Hot Extrusion on Mechanical and Corrosion Properties of a MgCaSr Alloy: Hunter Henderson1; Alex Wilson-Heid1; Michele Manuel; 1University of Florida
    Biomedical magnesium alloys have received attention in the last decade for their potential to degrade safely in the human body, facilitating temporary structural implants without the need for removal. Many alloys evaluated for this purpose are limited by potentially unsafe alloying elements, low strength, and/or high corrosion rate. Here we evaluate a Mg-1.0Ca-0.5Sr alloy, thermomechanically processed by hot extrusion. It is shown that excellent strength (in tension and compression) and low degradation rate (as measured in a simulated body fluid) resulting from microstructural modification of the extrusion process. Structure – property relationships are established, as well as property comparisons to other similar alloys.

YP-4: Increased Shear Deformation through Friction Stir Back Extrusion of Mg AZ31B: Textural Evolution and Its Relationship to Mechanical Properties: Justin Milner1; Fadi Abu-Farha2; 1NIST; 2Clemson University
    Friction stir back extrusion (FSBE) has been recently introduced as a promising technique for processing of lightweight alloy tubes with unique microstructure and mechanical properties. This work focuses on quantifying the effects of processing parameters on the material’s resultant texture and exploring the potentials for enhancing its performance. AZ31B-F magnesium round bars are processed into tubes by FSBE at three process conditions, leading to three distinct tubes with varying degrees of shear deformation. Textural examination via electron backscatter diffraction and neutron diffraction is carried out at key locations throughout the processed tubes in order determine the relationship between resultant texture and mechanical properties of the processed tubes. Through varying the processing parameters of the FSBE process technique, tubes can be tailored with unique textural characteristics, which can lead to a 300% increase in elongation as compared to the base material.