Open Access System for Information Sharing

Login Library

 

Article
Cited 19 time in webofscience Cited 0 time in scopus
Metadata Downloads

Effects of ferrite grain size and martensite volume fraction on dynamic deformation behaviour of 0 center dot 15C-2 center dot 0Mn-0 center dot 2Si dual phase steels

Title
Effects of ferrite grain size and martensite volume fraction on dynamic deformation behaviour of 0 center dot 15C-2 center dot 0Mn-0 center dot 2Si dual phase steels
Authors
Hwang, BCCao, TYShin, SYKim, SHLee, SHKim, SJ
POSTECH Authors
Kim, SHLee, SH
Date Issued
Jan-2005
Publisher
MANEY PUBLISHING
Abstract
Effects of ferrite grain size and martensite volume fraction on quasistatic and dynamic deformation behaviour of 0.15C-2.0Mn-0.2Si dual phase steels were investigated in this study. Dynamic torsional tests were conducted on six steel specimens that had different ferrite grain sizes and martensite volume fractions, using a torsional Kolsky bar, and then the test data were compared in terms of microstructures, tensile properties, fracture mode, and adiabatic shear band formation. Under dynamic torsional loading, maximum shear stress and fracture shear strain increased with decreasing ferrite grain size and increasing martensite volume fraction. Observation of the deformed area beneath the fracture surface after the dynamic torsional test indicated that adiabatic shear bands of 5 to 15 mu m in width were formed along the shear stress direction, and that voids or microcracks initiated at ferrites or martensite/ferrite interfaces below the shear band. The width of the shear band decreased as the ferrite grain size increased or the martensite volume fraction decreased. These phenomena were then analysed by introducing concepts of theoretical critical shear strain.
Keywords
dual phase steel; dynamic deformation; martensite volume fraction; ferrite grain size; step quenching; ADIABATIC SHEAR BANDS; TENSILE PROPERTIES; MECHANICAL-PROPERTIES; MORPHOLOGY; MICROSTRUCTURE; DEPENDENCE; TOUGHNESS; STRENGTH; ALLOY
URI
http://oasis.postech.ac.kr/handle/2014.oak/29651
DOI
10.1179/174328405X47
ISSN
0267-0836
Article Type
Article
Citation
MATERIALS SCIENCE AND TECHNOLOGY, vol. 21, no. 8, page. 967 - 975, 2005-01
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

 LEE, SUNG HAK
Dept of Materials Science & Enginrg
Read more

Views & Downloads

Browse