Details
| Original language | English |
|---|---|
| Pages (from-to) | 355-358 |
| Number of pages | 4 |
| Journal | International Journal of Material Forming |
| Volume | 3 |
| Issue number | SUPPL. 1 |
| Publication status | Published - 12 Jun 2010 |
Abstract
In industrial practice of hot forging, i. e. extrusion-type forging, abrupt changes in strain rate during the deformation of the material occur. For accurate numerical simulation of a forging process, the experimental investigation of the effect of the transient change in strain rate on plastic flow behaviour is necessary. The present paper deals with the investigation of this effect on the flow stress of an Al-Zn-Mg-Cu alloy during its deformation at 450°C. During continuous uniaxial compression loading of a cylindrical specimen, the strain rate was abruptly increased or decreased from its initial value at engineering strain of ~26 %. From the beginning of the upsetting up to the strain of ~26 % the value of the strain rate was constant and equal to either 1 s-1 or 10 s-1. At the strain of ~26 % the value of the strain rate was either increased to 10 s-1 or decreased to 1 s-1. The results of the experimental investigations were used to determine the isothermal flow stress-strain curves of the Al-Zn-Mg-Cu alloy. On the basis of these curves, the strain rate sensitivity index m as a function of true strain as well as temperature was determined.
Keywords
- Aluminium alloy, Extrusion-type forging, Flow stress-strain curve, Hot forging, Numerical simulation, Transient change in strain rate
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
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In: International Journal of Material Forming, Vol. 3, No. SUPPL. 1, 12.06.2010, p. 355-358.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of transient change in strain rate on plastic flow behaviour of Al-Zn-Mg-Cu alloy at elevated temperatures
AU - Petrov, P.
AU - Behrens, B.
AU - Conrads, H.
N1 - Funding information: The authors would like to thank the cooperation program between German Academic Exchange Service (DAAD) and Russian Ministry of Education for the financial support of this work (project No. RNP-2.2.2.3.8179). The experimental investigations as well as numerical simulation were carried out at IFUM, Leibniz Universität Hannover. One of the authors (P.P) is grateful to M.Sc. I. El-Galy for fruitful discussions within the scope of the paper.
PY - 2010/6/12
Y1 - 2010/6/12
N2 - In industrial practice of hot forging, i. e. extrusion-type forging, abrupt changes in strain rate during the deformation of the material occur. For accurate numerical simulation of a forging process, the experimental investigation of the effect of the transient change in strain rate on plastic flow behaviour is necessary. The present paper deals with the investigation of this effect on the flow stress of an Al-Zn-Mg-Cu alloy during its deformation at 450°C. During continuous uniaxial compression loading of a cylindrical specimen, the strain rate was abruptly increased or decreased from its initial value at engineering strain of ~26 %. From the beginning of the upsetting up to the strain of ~26 % the value of the strain rate was constant and equal to either 1 s-1 or 10 s-1. At the strain of ~26 % the value of the strain rate was either increased to 10 s-1 or decreased to 1 s-1. The results of the experimental investigations were used to determine the isothermal flow stress-strain curves of the Al-Zn-Mg-Cu alloy. On the basis of these curves, the strain rate sensitivity index m as a function of true strain as well as temperature was determined.
AB - In industrial practice of hot forging, i. e. extrusion-type forging, abrupt changes in strain rate during the deformation of the material occur. For accurate numerical simulation of a forging process, the experimental investigation of the effect of the transient change in strain rate on plastic flow behaviour is necessary. The present paper deals with the investigation of this effect on the flow stress of an Al-Zn-Mg-Cu alloy during its deformation at 450°C. During continuous uniaxial compression loading of a cylindrical specimen, the strain rate was abruptly increased or decreased from its initial value at engineering strain of ~26 %. From the beginning of the upsetting up to the strain of ~26 % the value of the strain rate was constant and equal to either 1 s-1 or 10 s-1. At the strain of ~26 % the value of the strain rate was either increased to 10 s-1 or decreased to 1 s-1. The results of the experimental investigations were used to determine the isothermal flow stress-strain curves of the Al-Zn-Mg-Cu alloy. On the basis of these curves, the strain rate sensitivity index m as a function of true strain as well as temperature was determined.
KW - Aluminium alloy
KW - Extrusion-type forging
KW - Flow stress-strain curve
KW - Hot forging
KW - Numerical simulation
KW - Transient change in strain rate
UR - http://www.scopus.com/inward/record.url?scp=78651556097&partnerID=8YFLogxK
U2 - 10.1007/s12289-010-0780-6
DO - 10.1007/s12289-010-0780-6
M3 - Article
AN - SCOPUS:78651556097
VL - 3
SP - 355
EP - 358
JO - International Journal of Material Forming
JF - International Journal of Material Forming
SN - 1960-6206
IS - SUPPL. 1
ER -