TY - JOUR
T1 - The effect of interstitial carbon on the initiation of plastic deformation of steels
AU - Sekido, Kaoru
AU - Ohmura, Takahito
AU - Zhang, Ling
AU - Hara, Toru
AU - Tsuzaki, Kaneaki
N1 - Funding Information:
The steel sheets in this study were supplied by Steel Research Laboratories, Nippon Steel Corporation. This study was supported by JST , CREST . K.S. acknowledges the National Institute for Materials Science for the provision of a NIMS Graduate Research Assistantship.
PY - 2011/12/15
Y1 - 2011/12/15
N2 - Pop-in behavior in nanoindentation was studied as a mechanism for the initiation of plastic deformation in two kinds of steels with different interstitial carbon contents; interstitial free (IF) and ultra low carbon (ULC) steels. The critical load Pc at which the pop-in occurs is higher in ULC than in IF, and the Pc decreases with decreasing loading rate, indicating that the pop-in mechanism is based on a thermal activation process. The interstitial carbon is thought to yield higher friction stress against dislocation movement and have an influence on the critical stress for the activation of the dislocation source formed underneath the indenter.
AB - Pop-in behavior in nanoindentation was studied as a mechanism for the initiation of plastic deformation in two kinds of steels with different interstitial carbon contents; interstitial free (IF) and ultra low carbon (ULC) steels. The critical load Pc at which the pop-in occurs is higher in ULC than in IF, and the Pc decreases with decreasing loading rate, indicating that the pop-in mechanism is based on a thermal activation process. The interstitial carbon is thought to yield higher friction stress against dislocation movement and have an influence on the critical stress for the activation of the dislocation source formed underneath the indenter.
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U2 - 10.1016/j.msea.2011.09.102
DO - 10.1016/j.msea.2011.09.102
M3 - Article
AN - SCOPUS:82255179208
SN - 0921-5093
VL - 530
SP - 396
EP - 401
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - 1
ER -