Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 725, Issue -, Pages 57-64Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.04.005
Keywords
CALPHAD; Ultra-high strength steel; Equal channel angular pressing; Grain refinement; Martensitic steel
Categories
Funding
- U.S. Air Force Research Labs
- DoD SMART Program
- U.S. National Science Foundation, Division of Civil, Mechanical, and Manufacturing Innovation, Design of Engineering Materials Program [1663130]
- RW Chief Scientist Venture Funds Effort [BLU-137]
Ask authors/readers for more resources
In this work, a CALPHAD thermodynamic model is used to assess the thermodynamic stability of austenite in an Ultra-High Strength Martensitic Steel (i.e., Eglin Steel) in order to refine parent austenite-grain sizes, via high temperature equal-channel angular pressing (ECAP). The parent austenite-grain sizes are reduced from 188 mu m to 14.8 mu m, which in turn, led to the refinement of martensite lath sizes. This approach produced a yield strength of 1.68 GPa, ultimate strength of 1.98 GPa, and an elongation of 16.1%. Overall, this method reduced development cycle times and achieved alloy performance on par with Ni-Co secondary hardening steels.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
