TY - GEN
T1 - Creep behavior of an oxide dispersion strengthened iron with ultrafine grain structure
AU - Dudko, V.
AU - Kaibyshev, R.
AU - Belyakov, A.
AU - Sakai, Y.
AU - Tsuzaki, Kaneaki
PY - 2010/2/9
Y1 - 2010/2/9
N2 - The creep behavior of oxide-bearing Fe-0.6%O steel was studied in the temperature range of 550-700°C at stresses ranging from 100 to 400 MPa. The creep data showed high values of an apparent stress exponent n close to ∼16 for power-law creep. In addition the apparent experimental activation energy was much higher than that for the lattice diffusion in a-iron. Analysis of creep data revealed that the deformation behavior was strongly affected by the threshold stresses, which are associated with the interaction between moving dislocations and fine incoherent oxide particles. Analysis of deformation behavior in terms of threshold stress leads the true stress exponent of ∼8; the activation energy for creep became close to value of activation energy for lattice diffusion at 700°C and for pipe-diffusion in the temperature range of 550-650°C.
AB - The creep behavior of oxide-bearing Fe-0.6%O steel was studied in the temperature range of 550-700°C at stresses ranging from 100 to 400 MPa. The creep data showed high values of an apparent stress exponent n close to ∼16 for power-law creep. In addition the apparent experimental activation energy was much higher than that for the lattice diffusion in a-iron. Analysis of creep data revealed that the deformation behavior was strongly affected by the threshold stresses, which are associated with the interaction between moving dislocations and fine incoherent oxide particles. Analysis of deformation behavior in terms of threshold stress leads the true stress exponent of ∼8; the activation energy for creep became close to value of activation energy for lattice diffusion at 700°C and for pipe-diffusion in the temperature range of 550-650°C.
UR - http://www.scopus.com/inward/record.url?scp=75849126011&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=75849126011&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.638-642.3194
DO - 10.4028/www.scientific.net/MSF.638-642.3194
M3 - Conference contribution
AN - SCOPUS:75849126011
SN - 0878492941
SN - 9780878492947
T3 - Materials Science Forum
SP - 3194
EP - 3199
BT - THERMEC 2009
T2 - 6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
Y2 - 25 August 2009 through 29 August 2009
ER -