TY - JOUR
T1 - Nondestructive detection and evaluation of materials degradation of 2.25Cr-1Mo steel by means of electrochemical method
AU - Watanabe, Y.
AU - Shoji, T.
PY - 1991
Y1 - 1991
N2 - A nondestructive method for detection and evaluation of degradation of 2.25Cr-1Mo steel by means of an electrochemical technique is described. A degree of materials degradation can be evaluated by the peak value of current density (△Ip) obtained by anodic polarization measurement. △Ip corresponds to the rate of selective dissolution of coarse carbides M6C. △Ip shows a good correlation with △FATT. Hence, toughness reduction can be nondestructively estimated by △Ip measurements. △Ip can be a representative parameter showing the decrease in solute Mo concentration in the matrix because of M6C (Mo-rich) carbide coarsening. △Ip shows a good correlation with hardness change △Hv. Based on this correlation between △Ip and △Hv, the degree of softening can be nondestructively estimated. The L.M.P. value of materials used in actual plants can be estimated by △Ip measurements.
AB - A nondestructive method for detection and evaluation of degradation of 2.25Cr-1Mo steel by means of an electrochemical technique is described. A degree of materials degradation can be evaluated by the peak value of current density (△Ip) obtained by anodic polarization measurement. △Ip corresponds to the rate of selective dissolution of coarse carbides M6C. △Ip shows a good correlation with △FATT. Hence, toughness reduction can be nondestructively estimated by △Ip measurements. △Ip can be a representative parameter showing the decrease in solute Mo concentration in the matrix because of M6C (Mo-rich) carbide coarsening. △Ip shows a good correlation with hardness change △Hv. Based on this correlation between △Ip and △Hv, the degree of softening can be nondestructively estimated. The L.M.P. value of materials used in actual plants can be estimated by △Ip measurements.
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M3 - Conference article
AN - SCOPUS:0025894243
SN - 0252-1059
VL - 51-52
SP - 543
EP - 548
JO - Mechanical and corrosion properties. Series A, Key engineering materials
JF - Mechanical and corrosion properties. Series A, Key engineering materials
T2 - Proceedings of the KSME/JSME Joint Conference
Y2 - 6 July 1990 through 7 July 1990
ER -