TY - GEN
T1 - Effects of minor elements X(X=Mo, Ni, Ti) on aympotic behavior along peak top of the major elenet in Fe-Cr type alloys
AU - Takemoto, Norihisa
AU - Saito, Yoshiyuki
PY - 2012
Y1 - 2012
N2 - Numerical simulations of phase separation in Fe-Cr-Mo and Fe-Cr-Ti ternary alloys and Fe-Cr-Mo-Ti quaternary alloys were performed with use of the Cahn-Hilliard equation for ternary alloys and quaternary alloys. We obtained that the asymptotic behaviours of minor element X(Mo, Ti) in Fe-Cr-X ternary alloys and Fe-Cr-Mo-Ti quaternary alloys along a trajectory of a peak top of the major element Cr was classified into three groups according to the sign of the second derivative of the chemical free energy with respect to the compositions of Cr and X(Mo, Ti). Theoretical analysis for the symptotic behavior Mo in Fe-Cr-Mo ternary has been formed in order to discuss the simulation results. Effect of the other elements, such as Ti on separation behaviours of Cr in Fe-Cr-Ti ternary alloys were also investigated. A simple theory for describing the effect of subsutitutonal element in Fe-Cr-X ternary alloys on the basis of simulations and theoretical analyses was proposed.
AB - Numerical simulations of phase separation in Fe-Cr-Mo and Fe-Cr-Ti ternary alloys and Fe-Cr-Mo-Ti quaternary alloys were performed with use of the Cahn-Hilliard equation for ternary alloys and quaternary alloys. We obtained that the asymptotic behaviours of minor element X(Mo, Ti) in Fe-Cr-X ternary alloys and Fe-Cr-Mo-Ti quaternary alloys along a trajectory of a peak top of the major element Cr was classified into three groups according to the sign of the second derivative of the chemical free energy with respect to the compositions of Cr and X(Mo, Ti). Theoretical analysis for the symptotic behavior Mo in Fe-Cr-Mo ternary has been formed in order to discuss the simulation results. Effect of the other elements, such as Ti on separation behaviours of Cr in Fe-Cr-Ti ternary alloys were also investigated. A simple theory for describing the effect of subsutitutonal element in Fe-Cr-X ternary alloys on the basis of simulations and theoretical analyses was proposed.
KW - Asymptotic behavior
KW - Duplex stainless
KW - Fe-Cr-N-Mo alloys
KW - Implicit method
KW - Numerical simulation
KW - Spinodal decomposition
UR - http://www.scopus.com/inward/record.url?scp=84855243175&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855243175&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.409.423
DO - 10.4028/www.scientific.net/AMR.409.423
M3 - Conference contribution
AN - SCOPUS:84855243175
SN - 9783037853047
VL - 409
T3 - Advanced Materials Research
SP - 423
EP - 430
BT - Advanced Materials Research
T2 - 7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
Y2 - 1 August 2011 through 5 August 2011
ER -