Dynamic compressive flow behaviour of S15C low carbon steel over wide temperature range

Woei-Shyan Lee, C. Y. Liu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The present study utilises the compressive split Hopkinson pressure bar to investigate the dynamic flow behaviour of S15C low carbon steel at temperatures ranging from 25 to 800°C. The effects of strain rate and temperature on the mechanical response and microstructure of the metal are evaluated. The flow stress of S15C low carbon steel is found to increase with increasing strain rate and to decrease with increasing temperature. Furthermore, the material temperature sensitivity is enhanced at higher strain rates. The study determines the strain rate sensitivity parameter and the activation volume under various strain rates and temperatures. It is found that the activation energy ΔG* varies as a function of strain rate and temperature and attains a maximum value of 62 kJ mol-1 under the current test conditions. A Zerilli-Armstrong bcc constitutive model is applied to describe the high strain rate plastic behaviour of S15C and is shown to produce acceptable results. Microstructural examination by TEM reveals that the dislocation density and degree of dislocation tangling both increase with increasing strain rate. Additionally, TEM observations indicate that a higher strain rate reduces the size of dislocation cells. Furthermore, it is shown that the annihilation of dislocations occurs more readily at elevated temperatures. The current results provide a valuable reference for the application of S15C low carbon steel in high speed plastic forming processes.

Original languageEnglish
Pages (from-to)1083-1093
Number of pages11
JournalMaterials Science and Technology
Volume21
Issue number9
DOIs
Publication statusPublished - 2005 Sep 1

Fingerprint

low carbon steels
Low carbon steel
strain rate
Strain rate
Temperature
temperature
tangling
plastics
Plastics forming
Transmission electron microscopy
transmission electron microscopy
Constitutive models
Plastic flow
Activation energy
examination
Metals
Chemical activation
high speed
activation
Plastics

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{b1642c3ef7644db59191b0da3f8a1393,
title = "Dynamic compressive flow behaviour of S15C low carbon steel over wide temperature range",
abstract = "The present study utilises the compressive split Hopkinson pressure bar to investigate the dynamic flow behaviour of S15C low carbon steel at temperatures ranging from 25 to 800°C. The effects of strain rate and temperature on the mechanical response and microstructure of the metal are evaluated. The flow stress of S15C low carbon steel is found to increase with increasing strain rate and to decrease with increasing temperature. Furthermore, the material temperature sensitivity is enhanced at higher strain rates. The study determines the strain rate sensitivity parameter and the activation volume under various strain rates and temperatures. It is found that the activation energy ΔG* varies as a function of strain rate and temperature and attains a maximum value of 62 kJ mol-1 under the current test conditions. A Zerilli-Armstrong bcc constitutive model is applied to describe the high strain rate plastic behaviour of S15C and is shown to produce acceptable results. Microstructural examination by TEM reveals that the dislocation density and degree of dislocation tangling both increase with increasing strain rate. Additionally, TEM observations indicate that a higher strain rate reduces the size of dislocation cells. Furthermore, it is shown that the annihilation of dislocations occurs more readily at elevated temperatures. The current results provide a valuable reference for the application of S15C low carbon steel in high speed plastic forming processes.",
author = "Woei-Shyan Lee and Liu, {C. Y.}",
year = "2005",
month = "9",
day = "1",
doi = "10.1179/174328405X51776",
language = "English",
volume = "21",
pages = "1083--1093",
journal = "Materials Science and Technology",
issn = "0267-0836",
publisher = "Maney Publishing",
number = "9",

}

Dynamic compressive flow behaviour of S15C low carbon steel over wide temperature range. / Lee, Woei-Shyan; Liu, C. Y.

In: Materials Science and Technology, Vol. 21, No. 9, 01.09.2005, p. 1083-1093.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dynamic compressive flow behaviour of S15C low carbon steel over wide temperature range

AU - Lee, Woei-Shyan

AU - Liu, C. Y.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - The present study utilises the compressive split Hopkinson pressure bar to investigate the dynamic flow behaviour of S15C low carbon steel at temperatures ranging from 25 to 800°C. The effects of strain rate and temperature on the mechanical response and microstructure of the metal are evaluated. The flow stress of S15C low carbon steel is found to increase with increasing strain rate and to decrease with increasing temperature. Furthermore, the material temperature sensitivity is enhanced at higher strain rates. The study determines the strain rate sensitivity parameter and the activation volume under various strain rates and temperatures. It is found that the activation energy ΔG* varies as a function of strain rate and temperature and attains a maximum value of 62 kJ mol-1 under the current test conditions. A Zerilli-Armstrong bcc constitutive model is applied to describe the high strain rate plastic behaviour of S15C and is shown to produce acceptable results. Microstructural examination by TEM reveals that the dislocation density and degree of dislocation tangling both increase with increasing strain rate. Additionally, TEM observations indicate that a higher strain rate reduces the size of dislocation cells. Furthermore, it is shown that the annihilation of dislocations occurs more readily at elevated temperatures. The current results provide a valuable reference for the application of S15C low carbon steel in high speed plastic forming processes.

AB - The present study utilises the compressive split Hopkinson pressure bar to investigate the dynamic flow behaviour of S15C low carbon steel at temperatures ranging from 25 to 800°C. The effects of strain rate and temperature on the mechanical response and microstructure of the metal are evaluated. The flow stress of S15C low carbon steel is found to increase with increasing strain rate and to decrease with increasing temperature. Furthermore, the material temperature sensitivity is enhanced at higher strain rates. The study determines the strain rate sensitivity parameter and the activation volume under various strain rates and temperatures. It is found that the activation energy ΔG* varies as a function of strain rate and temperature and attains a maximum value of 62 kJ mol-1 under the current test conditions. A Zerilli-Armstrong bcc constitutive model is applied to describe the high strain rate plastic behaviour of S15C and is shown to produce acceptable results. Microstructural examination by TEM reveals that the dislocation density and degree of dislocation tangling both increase with increasing strain rate. Additionally, TEM observations indicate that a higher strain rate reduces the size of dislocation cells. Furthermore, it is shown that the annihilation of dislocations occurs more readily at elevated temperatures. The current results provide a valuable reference for the application of S15C low carbon steel in high speed plastic forming processes.

UR - http://www.scopus.com/inward/record.url?scp=25644433521&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=25644433521&partnerID=8YFLogxK

U2 - 10.1179/174328405X51776

DO - 10.1179/174328405X51776

M3 - Article

VL - 21

SP - 1083

EP - 1093

JO - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 9

ER -