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A Note on the Kelvin Effect in 100Cr6 Steel with Application to Identification of the Elastoplastic Limit

Hallberg, Håkan LU (2012) In ISRN Thermodynamics 2012.
Abstract
Experimental and analytical results are presented regarding the temperature evolution in 100Cr6 steel under uniaxial loading. Differently heat-treated conditions of the material are studied at different strain rates. In the annealed state, the materials exhibits a pronounced initial yield stress as it passes from the elastic region to the plastic through discontinuous yielding. In contrast, the quenched and tempered material yields continuously. The focus

of the paper is on the temperature decrease during elastic deformation that precedes the more pronounced heating due to inelastic dissipation once the elastoplastic limit stress is surpassed. The applicability of the maximum temperature decrease in the elastic regime as a... (More)
Experimental and analytical results are presented regarding the temperature evolution in 100Cr6 steel under uniaxial loading. Differently heat-treated conditions of the material are studied at different strain rates. In the annealed state, the materials exhibits a pronounced initial yield stress as it passes from the elastic region to the plastic through discontinuous yielding. In contrast, the quenched and tempered material yields continuously. The focus

of the paper is on the temperature decrease during elastic deformation that precedes the more pronounced heating due to inelastic dissipation once the elastoplastic limit stress is surpassed. The applicability of the maximum temperature decrease in the elastic regime as a replacement for the commonly used 0.2%-strain measure to define the elastoplastic limit is discussed. For 100Cr6 steel, the 0.2%-strain measure is found, in some cases, to overestimate the initial yield stress by 50 MPa. The drop in temperature corresponding to the shift from elastic to inelastic material behavior is experimentally determined and compared to predictions by the Kelvin formula which in the current study give a maximum 50% error. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
ISRN Thermodynamics
volume
2012
publisher
ISRN - International Scholarly Research Network
ISSN
2090-5203
DOI
10.5402/2012/106051
language
English
LU publication?
yes
id
f1717bc7-b9d8-4e1a-b7c4-fefb0629499f (old id 3127151)
date added to LUP
2012-10-09 21:22:04
date last changed
2016-04-15 18:33:26
@article{f1717bc7-b9d8-4e1a-b7c4-fefb0629499f,
  abstract     = {Experimental and analytical results are presented regarding the temperature evolution in 100Cr6 steel under uniaxial loading. Differently heat-treated conditions of the material are studied at different strain rates. In the annealed state, the materials exhibits a pronounced initial yield stress as it passes from the elastic region to the plastic through discontinuous yielding. In contrast, the quenched and tempered material yields continuously. The focus<br/><br>
of the paper is on the temperature decrease during elastic deformation that precedes the more pronounced heating due to inelastic dissipation once the elastoplastic limit stress is surpassed. The applicability of the maximum temperature decrease in the elastic regime as a replacement for the commonly used 0.2%-strain measure to define the elastoplastic limit is discussed. For 100Cr6 steel, the 0.2%-strain measure is found, in some cases, to overestimate the initial yield stress by 50 MPa. The drop in temperature corresponding to the shift from elastic to inelastic material behavior is experimentally determined and compared to predictions by the Kelvin formula which in the current study give a maximum 50% error.},
  author       = {Hallberg, Håkan},
  issn         = {2090-5203},
  language     = {eng},
  publisher    = {ISRN - International Scholarly Research Network},
  series       = {ISRN Thermodynamics},
  title        = {A Note on the Kelvin Effect in 100Cr6 Steel with Application to Identification of the Elastoplastic Limit},
  url          = {http://dx.doi.org/10.5402/2012/106051},
  volume       = {2012},
  year         = {2012},
}