Probing Deformation Mechanisms of Nanostructured Mg Alloys for Unprecedented Strength and Good Ductility
Abstract
The major goal of the proposed project is to probe fundamental deformation mechanisms with an aim to produce ultrastrong Mg alloys with good ductility. Both alloying and nanocrystallization will be used as effective tools to activate deformation mechanisms that might yield high strength and good ductility. This proposed project is a continuation of our ARO Short Term Innovative Research (STIR) project, which has successfully demonstrated the possibility of producing deformation twins and stacking faults in Mg alloys. Specifically, this project will probe the following three fundamental issues: 1) Deformation twinning in nanostructured Mg alloys and the effect of grain size. 2) Grain boundary mediated dislocation activities, including partials that create stacking faults on the basal plane. 3) Formation of clusters of alloy elements and second phase particles assisted by dislocations and grain boundaries, and the interactions between them. The mechanical behaviors of the nanostructured Mg and its alloys will also be studied to reveal how the deformation mechanisms affect the mechanical properties, which is the secondary focus of the proposed project. The knowledge obtained in this study will be used to guide the design of nanostructured Mg alloys for superior mechanical properties.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 22, 2018
- Accession Number
- AD1059572
Entities
People
- Carl C. Koch
- Y.T. Zhu
Organizations
- North Carolina State University