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Cited 26 time in webofscience Cited 34 time in scopus
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Effects of Annealing Temperature on Microstructure and Tensile Properties in Ferritic Lightweight Steels

Title
Effects of Annealing Temperature on Microstructure and Tensile Properties in Ferritic Lightweight Steels
Authors
Seung Youb HanSang yong ShinHyuk-Joong LeeLee, BJLee, SKim, NJJai-Hyun Kwak
POSTECH Authors
Lee, BJLee, SKim, NJ
Date Issued
Mar-2012
Publisher
SPRINGER
Abstract
An investigation was conducted into the effects of annealing temperature on microstructure and tensile properties of ferritic lightweight steels. Two steels were fabricated by varying the C content, and were annealed at 573 K to 1173 K (300 A degrees C to 900 A degrees C) for 1 hour. According to the microstructural analysis results, kappa-carbides were formed at about 973 K (700 A degrees C), which was confirmed by equilibrium phase diagrams calculated from a THERMO-CALC program. In the steel containing low carbon content, needle-shaped kappa-carbides were homogeneously dispersed in the ferrite matrix, whereas bulky band-shaped martensites were distributed in the steel containing high carbon content. In the 973 K (700 A degrees C)-annealed specimen of the steel containing high carbon content, deformation bands were formed throughout the specimen, while fine carbides were sufficiently deformed inside the deformation bands, thereby resulting in the greatest level of strength and ductility. These results indicated that the appropriate annealing treatment of steel containing high carbon content was useful for the improvement of both strength and ductility over steel containing low carbon content.
URI
http://oasis.postech.ac.kr/handle/2014.oak/16004
DOI
10.1007/S11661-011-0942-2
ISSN
1073-5623
Article Type
Article
Citation
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 43A, no. 3, page. 843 - 853, 2012-03
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 LEE, SUNG HAK
Dept of Materials Science & Enginrg
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