12th International Conference on Magnesium Alloys and their Applications (Mg 2021): Structural Applications
Program Organizers: Alan Luo, Ohio State University; Mihriban Pekguleryuz, McGill University; Sean Agnew, University of Virginia; John Allison, University of Michigan; Karl Kainer; Eric Nyberg, Kaiser Aluminum Trentwood; Warren Poole, University of British Columbia; Kumar Sadayappan, CanmetMATERIALS; Bruce Williams, Canmetmaterials Natural Resources Canada; Stephen Yue, Mcgill University

Tuesday 9:50 AM
June 15, 2021
Room: Invited I
Location: Virtual

Session Chair: Warren Poole, University of British Columbia


9:50 AM  Invited
Elevated Temperature Formability of Texture-weakened Magnesium-sheet Alloys: Strain-rate Sensitivity Effects: David Klaumunzer1; Marc Imiela1; 1Volkswagen Group Innovation
    Recent work in the development of novel magnesium sheet alloys has been focussed extensively on improving the room-temperature stretch formability. In most alloy systems, such improvement is attributed to a texture-weakening effect by the addition of zinc in combination with either rare-earth elements or calcium. While such an improvement is significant compared to standard alloys showing a strong basal texture, such as AZ31, the formability enhancement is still insufficient to form real components, e.g. for the automotive industry, at room temperature. Additionally, some of the recently developed alloys show a retarded enhancement of formability at elevated temperatures making them inherently difficult to form into complex geometries. We can show that this can be attributed to a strain-rate sensitivity effect which attains low values at intermediate temperatures. Based on these findings, alloy design guidelines can be established that help to improve formability also in an industrially relevant context.

10:20 AM  Invited
Process Map and Extrusion Properties of New ZAXEM11100 Alloy: Thomas Avey1; Joshua Caris2; Alan Luo1; 1The Ohio State University; 2Terves LLC
    Recently, a new magnesium alloy ZAXEM11100 (Mg-1.0Zn-1.0Al-0.5Ca-0.4Mn-0.2Ce, wt. pct.) has been developed for automotive sheet forming applications. In this collaborative work between Terves and OSU, ZAXEM11100 alloy has been evaluated for extrusion applications. CALPHAD (CALculation of PHAse Diagrams) modeling is used to design a simplified multi-stage solution treatment schedule (T4) and aging treatment (T6) after extrusion. A process map is generated for the new alloy based on Gleeble thermomechanical testing results at various temperature and strain rates. Room temperature tensile results will be presented in the T4 and post-extrusion T6 conditions with corresponding microstructures in comparison with the alloy sheet samples processed via hot rolling and heat treatment.