| Abstract Scope |
High yield (HY) steels are primarily alloyed with carbon, nickel, chromium, and molybdenum to achieve enhanced yield strength, provide corrosion resistance, and desired formability. The present work reports on the prior austenite grain size refinement due to micro-alloying additions to a baseline HY-80 (with a minimum yield strength of 80 kilo-pounds per square inch) composition. Tensile and Charpy V-Notch testing showed an improvement in mechanical properties due to the micro-alloying addition. Grain refinement was observed using microscopic analysis, following a representative heat treatment path typically used in HY-80 steels. The advantages of a finer prior austenite grain size in regard to processing and mechanical property improvements will be discussed.
Acknowledgement: This research is partly sponsored by the DLA-Troop Support, Philadelphia, PA and the Defense Logistics Agency Information Operations, J68, Research & Development, Ft. Belvoir, VA. |