12th International Conference on Magnesium Alloys and their Applications (Mg 2021): Alloy Technologies
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

Thursday 8:00 AM
June 17, 2021
Room: Plenary
Location: Virtual

Session Chair: Karl Kainer


8:00 AM  Plenary
Breaking Expectations in Magnesium Alloys: Nick Birbilis1; Zhuoran Zeng1; 1The Australian National University
    Magnesium (Mg) alloys are remarkable materials, with several extremes in their properties (not always favourable). The opportunities from the low density of Mg are yet to be fully realised (in spite of increased year on year usage). Some of the challenges to Mg-alloy development have been economic and geopolitical, others from competitor action – with the rate of Mg-alloy development not as significant as that of other alloy systems. Recent years have seen unique step changes in the understanding of Mg-alloy behaviour - particularly in ductility and corrosion performance. Enhanced understanding, facilitates design opportunities, and the advent of more ductile magnesium, and corrosion-resistant Mg-alloys is emerging. Examples covering development of not-so-novel Mg-alloys, with very novel properties, are presented. Concepts are extended to Mg-alloys for use in batteries and as functional materials (highlighting how versatile Mg-alloys are).

8:30 AM  Plenary
Research and Development Trends in LPSO Magnesium Alloys for Structural and Biomedical Applications: Yoshihito Kawamura1; 1Kumamoto University
    LPSO magnesium alloys with a duplex structure of alpha-Mg and LPSO phases exhibit a remarkable balance of properties of high strength, heat resistance, flame resistance and reasonable corrosion resistance. Their manufacturing technology and applications are becoming more robust in Japan. Recently, we've succeeded in developing incombustible LPSO Mg-Zn-Y alloys. The ignition temperature was improved from 1,150 K to 1,300 K. The LPSO Mg-Zn-Y alloys, produced by an RS P/M processing with optimized manufacturing conditions, have excellent fracture toughness, with 20 MPa m1/2 or higher in fracture toughness KIc and >400 MPa in yield strength σy. We are now developing manufacturing technology of RS P/M LPSO Mg-Zn-Y alloys with excellent fracture toughness for aerospace application. Moreover, fine-gauge wires with 30 μm in diameter have been fabricated by drawing the RS/PM LPSO Mg-Zn-Y alloys. We are currently using these fine-gauge wires to design and develop bioabsorbable medical devices.

9:00 AM  Plenary
Magnesium Structural Application: A Case Study: Hamid Jahed1; 1University of Waterloo
     Attractive specific strength and fatigue properties, excellent machinability, and good dimensional tolerances in casting and forging of magnesium captured the attention of automotive companies as a potential candidate for weight reduction. Lots of progress was made during past two decades in weight saving from 10% to 70% per part when original steel and/or aluminum parts were replaced with magnesium. Strong basal texture of wrought magnesium alloys limits active slip systems at room temperature. Activation of prismatic and pyramidal slip systems at temperatures above 225C, however, enables forming. Leveraging the hot temperature forming and fatigue properties, magnesium suspension parts manufactured through forging became the focus of a large-scale research and development project led by the University of Waterloo in collaboration with Multimatic, Canmet, Ford, and Centreline. The successful design, manufacturing, and testing of front lower arm suspension of a car with 37% weight saving is presented in this plenary talk.