| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5455159 | Materials Science and Engineering: A | 2017 | 43 Pages |
Abstract
Microstructures and tensile properties of a Ti and Mo micro-alloyed ultrafine-grained medium Mn TWIP-TRIP steel were investigated. The steel exhibits a superior combination of strength and ductility, i.e. 46800Â MPaâ%, achieved by a high phase fraction of room temperature austenite with enhanced stability. Grain refinement is obtained from the formation of nano-sized (Ti, Mo)C precipitates by optimization of the intercritical annealing time and temperature after cold rolling. The intercritical annealing temperature dependence of the deformation mechanisms is investigated in detail. The localized deformation, pronounced when the TRIP effect is dominant, is related to the correlated strain-induced martensitic transformation of austenite islands.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Dongyeol Lee, Jin-Kyung Kim, Seawoong Lee, Kyooyoung Lee, Bruno C. De Cooman,