ELECTROCHEMICAL MONITORING OF AGING EMBRITTLEMENT OF 21/4CR-1MO STEEL FOR GAS-COOLED REACTOR PRESSURE BOUNDARY-COMPONENTS

被引：5

作者：

NISHIYAMA, Y ^{[1
]}

FUKAYA, K ^{[1
]}

SUZUKI, M ^{[1
]}

ETO, M ^{[1
]}

SHOJI, T ^{[1
]}

机构：

[1] TOHOKU UNIV,FRACTURE TECHNOL RES INST,SENDAI,MIYAGI 980,JAPAN

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 1994年 / 21卷 / 01期

关键词：

D O I：

10.1016/0167-8442(94)90008-6

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The nondestructive testing technique is applied to evaluate the temper embrittlement of normalized and tempered 2 1/4Cr-1Mo steel; it is based on the anodic polarization behavior in calcium nitrate solution. The steel specimen is aged at a stress of 210 MPa at 450-degrees-C for up to 8800 h in order to examine the effect of applied stress on the enhancement of intergranular segregation of phosphorus. The secondary peak observed in the polarization curve for the material aged under stress was compared with that for the non-stressed. It can be quantified with the degree of intergranular segregation of phosphorus. The data suggest that the enhancement of phosphorus segregation due to the applied stress is only recognized after 3000 h of aging. This effect diminishes with increasing aging time.

引用

页码：51 / 57

页数：7

共 11 条

[1]

JONES RH, 1989, CORROSION, P227

[2] THE EFFECTS OF SB, SN, AND P ON THE STRENGTH OF GRAIN-BOUNDARIES IN A NI-CR STEEL [J].

KAMEDA, J ;

MCMAHON, CJ .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1981, 12 (01) :31-37

[3] INTERGRANULAR CORROSION OF IRON-PHOSPHORUS ALLOYS IN NITRATE SOLUTIONS [J].

KUPPER, J ;

ERHART, H ;

GRABKE, HJ .

CORROSION SCIENCE, 1981, 21 (03) :227-&

[4]

NISHIYAMA Y, 1993, AM SOC TEST MATER, V1204, P16, DOI 10.1520/STP12718S

[5] STUDY ON 21/4CR-1 MO STEEL FOR HIGH-TEMPERATURE GAS-COOLED REACTOR MATERIAL CHARACTERIZATION OF FORGED LOW SI21/4CR-1 MO STEEL [J].

OKU, T ;

KODAIRA, T ;

FUKAYA, K ;

SUZUKI, M ;

TANAKA, Y ;

IWADATE, T ;

SUZUKI, K ;

SATO, I .

NUCLEAR ENGINEERING AND DESIGN, 1990, 119 (2-3) :177-186

[6] THE EFFECTS OF APPLIED STRESS ON THE INTERGRANULAR PHOSPHORUS SEGREGATION IN A CHROMIUM STEEL [J].

SHINODA, T ;

NAKAMURA, T .

ACTA METALLURGICA, 1981, 29 (09) :1631-1636

[7]

SHOJI T, 1987, NONDESTRUCTIVE EVALU, P75

[8]

SUZUKI M, 1982, T IRON STEEL I JPN, V22, P862

[9]

SUZUKI M, 1983, T IRON STEEL I JPN, V23, P842

[10] ELECTROCHEMICAL AND AUGER-SPECTROSCOPIC STUDIES ON THE INTERGRANULAR CORROSION OF IRON IN NITRATE SOLUTIONS [J].

TAUBER, G ;

GRABKE, HJ .

CORROSION SCIENCE, 1979, 19 (11) :793-798

← 1 2 →