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Ultrafine-Grained 6wt% Mn TRIP steel

Title
Ultrafine-Grained 6wt% Mn TRIP steel
Authors
이세웅
Date Issued
2011
Publisher
포항공과대학교
Abstract
Multi-Phase, Ultra-fine grained TRIP steel (MP-UFG-TRIP) containing 6 mass-%Mn was obtained by cold rolling and intercritical annealing of an initially fully martensitic microstructure. Ultrafine grained microstructures with a mean grain size less than 300nm were obtained. The fraction of reverse transformation austenite in the dual phase microstructure was controlled by changing the intercritical annealing temperature. The tensile properties were found to be strongly influenced by the volume fraction of reverse transformation austenite. The presence of UFG reverse austenite also resulted in a pronounced localization of the deformation. Brief study on the localized band was conducted to find the way to improve the mechanical property of the steel.
URI
http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000000900552
http://oasis.postech.ac.kr/handle/2014.oak/1090
Article Type
Thesis
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