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TRANSFORMATION STRENGTHENING BY THERMOMECHANICAL TREATMENTS IN C-MN-NI-NB STEELS SCIE SCOPUS

Title
TRANSFORMATION STRENGTHENING BY THERMOMECHANICAL TREATMENTS IN C-MN-NI-NB STEELS
Authors
LEE, SKWON, DLEE, YKKWON, O
Date Issued
1995-05
Publisher
MINERALS METALS MATERIALS SOC
Abstract
The purpose of this study is to clarify the correlation between microstructural factors and mechanical properties of ultrafine steels processed by thermomechanical controlled treatments. Three steels deformed at high strain rates in a pilot plant rolling mill showed very fine ferritic microstructure, whose grains became more equiaxed and finer with increasing fraction of alloying elements, and had good tensile and fracture properties, although they contained only about 0.01 pct carbon. Especially in the Ni-added steel, tensile properties were greatly improved because of the high dislocation density and the fineness of the ferritic substructure, readily satisfying the requirements for commercial-grade high-strength, high-toughness steels. The formation of ultrafine equiaxed grains in the steels might be explained by a possible strain-induced dynamic transformation mechanism associated with the austenite --> ferrite transformation caused by heavy deformation in the austenite range.
URI
https://oasis.postech.ac.kr/handle/2014.oak/11397
DOI
10.1007/BF02670605
ISSN
1073-5623
Article Type
Article
Citation
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 26, no. 5, page. 1093 - 1100, 1995-05
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이성학LEE, SUNG HAK
Dept of Materials Science & Enginrg
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