Open AccessTransformation plasticity in ductile solids. Final report, August 1, 1988--November 30, 1995
Author(s) -
Gregory B. Olson
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/369711
Subject(s) - materials science , toughness , austenite , ductility (earth science) , metallurgy , alloy , ultimate tensile strength , plasticity , precipitation , fracture toughness , composite material , microstructure , creep , physics , meteorology
Throughout history, the development of stronger materials has enabled the realization of countless technological advances. Unfortunately, any increase in strength is rarely achieved without concomitant decreases in toughness and ductility: a fact which severely limits the utility of materials such as ultrahigh-strength alloy steels. Typical precipitation-strengthened stainless steels have very little toughness at high strength levels. In the last decade, however, several investigators have reported exceptionally large fracture toughness values in high-strength precipitation-hardened metastable austenitic steels. This remarkable achievement is directly attributable to the process of transformation toughening. This report describes studies on tranformations and enhancement of plane-strain ductility in high strength steels