Electrochemical monitoring of aging embrittlement of 2 1 4Cr1Mo steel for gas-cooled reactor pressure boundary components

Y. Nishiyama, K. Fukaya, M. Suzuki, M. Eto, T. Shoji

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5 Citations (Scopus)

Abstract

The nondestructive testing technique is applied to evaluate the temper embrittlement of normalized and tempered 2 1 4Cr1Mo 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°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.

Original languageEnglish
Pages (from-to)51-57
Number of pages7
JournalTheoretical and Applied Fracture Mechanics
Volume21
Issue number1
DOIs
Publication statusPublished - 1994 Aug

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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