Effect of heat treatment on microstructures and tensile properties of ultrafine grained C-Mn steel containing 0.34 mass% V

Kyung Tae Park, Soo Yeon Han, Dong Hyuk Shin, Young-Kook Lee, Kyung Jong Lee, Kyung Sub Lee

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

An ultrafine grained (UFG) C-Mn steel containing a relatively large amount of vanadium was fabricated by equal channel angular pressing (ECAP) and its microstructures and tensile properties were examined. This investigation was aimed at demonstrating the effect of precipitation stage of vanadium precipitates in the course of the material processing on the tensile properties of the ultrafine grained C-Mn steel, especially strength and strain hardening capability. For this purpose, the two different heat treatments were carried out on the: present steel: (a) conventional normalization for vanadium precipitation before ECAP, and (b) isothermal transformation for vanadium precipitation during ECAP and subsequent annealing. The results showed that the second heat treatment was more effective on improving the thermal stability and the overall tensile properties of the steel by better uniform distribution of nano-sized vanadium precipitates which yielded an extensive interaction with lattice dislocations inside ultrafine ferrite grains. In addition, in this report, the feasibility enhancing the strain hardening capability of the UFG C-Mn steel was explored by comparing the microstructure and stress-strain curve of the steel prepared by the second heat treatment with those of the UFG C-Mn steel without vanadium.

Original languageEnglish
Pages (from-to)1057-1062
Number of pages6
JournalISIJ International
Volume44
Issue number6
DOIs
Publication statusPublished - 2004 Jan 1

Fingerprint

Steel
Vanadium
Tensile properties
Heat treatment
Microstructure
Equal channel angular pressing
Strain hardening
Precipitates
Stress-strain curves
Ultrafine
Ferrite
Thermodynamic stability
Annealing
Processing

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Park, Kyung Tae ; Han, Soo Yeon ; Shin, Dong Hyuk ; Lee, Young-Kook ; Lee, Kyung Jong ; Lee, Kyung Sub. / Effect of heat treatment on microstructures and tensile properties of ultrafine grained C-Mn steel containing 0.34 mass% V. In: ISIJ International. 2004 ; Vol. 44, No. 6. pp. 1057-1062.
@article{6f36dc16f6344baea3e8a66973c5c9aa,
title = "Effect of heat treatment on microstructures and tensile properties of ultrafine grained C-Mn steel containing 0.34 mass{\%} V",
abstract = "An ultrafine grained (UFG) C-Mn steel containing a relatively large amount of vanadium was fabricated by equal channel angular pressing (ECAP) and its microstructures and tensile properties were examined. This investigation was aimed at demonstrating the effect of precipitation stage of vanadium precipitates in the course of the material processing on the tensile properties of the ultrafine grained C-Mn steel, especially strength and strain hardening capability. For this purpose, the two different heat treatments were carried out on the: present steel: (a) conventional normalization for vanadium precipitation before ECAP, and (b) isothermal transformation for vanadium precipitation during ECAP and subsequent annealing. The results showed that the second heat treatment was more effective on improving the thermal stability and the overall tensile properties of the steel by better uniform distribution of nano-sized vanadium precipitates which yielded an extensive interaction with lattice dislocations inside ultrafine ferrite grains. In addition, in this report, the feasibility enhancing the strain hardening capability of the UFG C-Mn steel was explored by comparing the microstructure and stress-strain curve of the steel prepared by the second heat treatment with those of the UFG C-Mn steel without vanadium.",
author = "Park, {Kyung Tae} and Han, {Soo Yeon} and Shin, {Dong Hyuk} and Young-Kook Lee and Lee, {Kyung Jong} and Lee, {Kyung Sub}",
year = "2004",
month = "1",
day = "1",
doi = "10.2355/isijinternational.44.1057",
language = "English",
volume = "44",
pages = "1057--1062",
journal = "ISIJ International",
issn = "0915-1559",
publisher = "Iron and Steel Institute of Japan",
number = "6",

}

Effect of heat treatment on microstructures and tensile properties of ultrafine grained C-Mn steel containing 0.34 mass% V. / Park, Kyung Tae; Han, Soo Yeon; Shin, Dong Hyuk; Lee, Young-Kook; Lee, Kyung Jong; Lee, Kyung Sub.

In: ISIJ International, Vol. 44, No. 6, 01.01.2004, p. 1057-1062.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of heat treatment on microstructures and tensile properties of ultrafine grained C-Mn steel containing 0.34 mass% V

AU - Park, Kyung Tae

AU - Han, Soo Yeon

AU - Shin, Dong Hyuk

AU - Lee, Young-Kook

AU - Lee, Kyung Jong

AU - Lee, Kyung Sub

PY - 2004/1/1

Y1 - 2004/1/1

N2 - An ultrafine grained (UFG) C-Mn steel containing a relatively large amount of vanadium was fabricated by equal channel angular pressing (ECAP) and its microstructures and tensile properties were examined. This investigation was aimed at demonstrating the effect of precipitation stage of vanadium precipitates in the course of the material processing on the tensile properties of the ultrafine grained C-Mn steel, especially strength and strain hardening capability. For this purpose, the two different heat treatments were carried out on the: present steel: (a) conventional normalization for vanadium precipitation before ECAP, and (b) isothermal transformation for vanadium precipitation during ECAP and subsequent annealing. The results showed that the second heat treatment was more effective on improving the thermal stability and the overall tensile properties of the steel by better uniform distribution of nano-sized vanadium precipitates which yielded an extensive interaction with lattice dislocations inside ultrafine ferrite grains. In addition, in this report, the feasibility enhancing the strain hardening capability of the UFG C-Mn steel was explored by comparing the microstructure and stress-strain curve of the steel prepared by the second heat treatment with those of the UFG C-Mn steel without vanadium.

AB - An ultrafine grained (UFG) C-Mn steel containing a relatively large amount of vanadium was fabricated by equal channel angular pressing (ECAP) and its microstructures and tensile properties were examined. This investigation was aimed at demonstrating the effect of precipitation stage of vanadium precipitates in the course of the material processing on the tensile properties of the ultrafine grained C-Mn steel, especially strength and strain hardening capability. For this purpose, the two different heat treatments were carried out on the: present steel: (a) conventional normalization for vanadium precipitation before ECAP, and (b) isothermal transformation for vanadium precipitation during ECAP and subsequent annealing. The results showed that the second heat treatment was more effective on improving the thermal stability and the overall tensile properties of the steel by better uniform distribution of nano-sized vanadium precipitates which yielded an extensive interaction with lattice dislocations inside ultrafine ferrite grains. In addition, in this report, the feasibility enhancing the strain hardening capability of the UFG C-Mn steel was explored by comparing the microstructure and stress-strain curve of the steel prepared by the second heat treatment with those of the UFG C-Mn steel without vanadium.

UR - http://www.scopus.com/inward/record.url?scp=4243094953&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243094953&partnerID=8YFLogxK

U2 - 10.2355/isijinternational.44.1057

DO - 10.2355/isijinternational.44.1057

M3 - Article

AN - SCOPUS:4243094953

VL - 44

SP - 1057

EP - 1062

JO - ISIJ International

JF - ISIJ International

SN - 0915-1559

IS - 6

ER -