TY - JOUR
T1 - Effect of interstitial elements on Hall-Petch coefficient of ferritic iron
AU - Takeda, Kengo
AU - Nakada, Nobuo
AU - Tsuchiyama, Toshihiro
AU - Takaki, Setsuo
PY - 2008
Y1 - 2008
N2 - Yield strength was investigated in iron with different grain size and different contents of carbon and nitrogen. The Hall-Petch coefficient; k yis originally very small in high purity iron (about 100 MPa.μm1/2) but it increases with increasing the amount of solute carbon content. The value of ky is enlarged to around 550 MPa.μm1/2 by 60 ppm of solute carbon and levels off at around 600 MPa.μ1/2 in the region above 60 ppm solute carbon. On the other hand, nitrogen hardly influences the ky value. The mechanism of the change in Hall-Petch coefficient was then discussed in terms of the grain boundary segregation of carbon and nitrogen atoms.
AB - Yield strength was investigated in iron with different grain size and different contents of carbon and nitrogen. The Hall-Petch coefficient; k yis originally very small in high purity iron (about 100 MPa.μm1/2) but it increases with increasing the amount of solute carbon content. The value of ky is enlarged to around 550 MPa.μm1/2 by 60 ppm of solute carbon and levels off at around 600 MPa.μ1/2 in the region above 60 ppm solute carbon. On the other hand, nitrogen hardly influences the ky value. The mechanism of the change in Hall-Petch coefficient was then discussed in terms of the grain boundary segregation of carbon and nitrogen atoms.
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U2 - 10.2355/isijinternational.48.1122
DO - 10.2355/isijinternational.48.1122
M3 - Article
AN - SCOPUS:55149091112
VL - 48
SP - 1122
EP - 1125
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 8
ER -