Deformation Mechanisms and High Strain Rate Properties of Magnesium (Mg) and Mg Alloys

Abstract

This report summarizes research at the Johns Hopkins University Center for Advanced Metallic and Ceramic Systems on lightweight magnesium (Mg) and Mg alloys, under the sponsorship of the U.S. Army Research Laboratory (ARL) Materials Center of Excellence (MCOE) during 2007-2010. In collaboration with ARL, extensive studies have been conducted on the fundamental deformation mechanisms of pure Mg and the mechanical properties at high strain rate of ultrafine-grained Mg alloys. Atomistic simulations, transmission electron microscopy, and Kolsky bar testing have been performed to investigate the deformation mechanisms of Mg and Mg alloys. Newly uncovered mechanisms of pyramidal slip, {1011} 1012 twinning and {1012} 1011 twinning, were observed for hexagonal close-packed Mg. High strain rate properties of Mg alloys with submicron grain sizes were also studied.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2012
Accession Number
ADA568946

Entities

People

  • Bin Li
  • Evan Ma
  • James W. McCauley
  • Kaliatt T. Ramesh
  • Logan Shannahan
  • Robert J. Dowding
  • Suveen Mathaudhu

Organizations

  • Johns Hopkins University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Compressive Strength
  • Electron Microscopy
  • Grain Boundaries
  • Grain Size
  • Magnesium
  • Materials
  • Mechanical Properties
  • Metals
  • Microscopes
  • Microscopy
  • Military Research
  • Molecular Dynamics
  • Plastic Deformation
  • Simulations
  • Strain Rate
  • Transmission Electron Microscopy
  • Universities

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics