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Meeting MS&T23: Materials Science & Technology
Symposium Advanced Materials for Harsh Environments
Presentation Title Understanding SCC Resistance and Failure in AF96 Welded Joints
Author(s) Mary E. Cefaratti, Antonio Ramirez, Jenifer Locke
On-Site Speaker (Planned) Jenifer Locke
Abstract Scope The Stress Corrosion Cracking (SCC) resistance of AF96, an ultra-high strength martensitic steel, is being investigated with interest in understanding and quantifying the effect of welding process and filler metal on SCC performance. As this is a recently developed steel, and martenstic steels are notoriously susceptible to hydrogen environment embrittlement causing significant SCC issues, understanding SCC in welded AF96 is important. The current welds being tested are LA-100, ER100S, and ER120S. A comparison will be made against the base material and air. Currently for the base material, loading in 0.6M NaCl shows a strain at failure of ~2% while the strain at failure in air is typically 10-13%. AF96 is an ideal for special purpose ammunition, and even armor applications, given its lower elemental and processing costs.


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