Significance of Copper, Phosphorus, and Sulfur Content to Radiation Sensitivity and Postirradiation Heat Treatment of A302-B Steel.

Abstract

The effects of three levels of copper content and phosphorus content and two levels of sulfur content on radiation sensitivity and postirradiation heat tratment response were explored for a reactor pressure vessel steel, Type A302-B. Test plates for the investigation were produced from 182-kg (400-lb) laboratory melts. The contributions of individual elements were assessed from Charpy-V (C sub v) notch ductility changes with 288 C (550 F) irradiation and with a 343 C (650 F)-168 h postirradiation heat treatment. Limited studies of properties recovery by postirradiation 399 c (750 f) heat treatment were also made. Radiation embrittlement sensitivity, as shown by C sub v transition-temperature elevation and C sub v upper-shelf reduction, generally increased with increased-copper and phosphorus content and with decreased sulfur content. Certain ranges of phosphorus and copper content were found to be more critical than others.

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Document Details

Document Type
Technical Report
Publication Date
Apr 12, 1979
Accession Number
ADA068696

Entities

People

  • J. Russell Hawthorne

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Annealing
  • Ductility
  • Energy Levels
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Military Research
  • Orientation (Direction)
  • Radiation
  • Radiation Effects
  • Radiation Resistance
  • Reduction Of Area
  • Tensile Properties
  • Transition Temperature
  • Transitions
  • United States
  • United States Government

Readers

  • Metallurgy
  • Nuclear and Radiation Engineering.