Variation of Mechanical Properties in Large Steel Forgings

Abstract

In a continuing effort to determine the causes of mechanical property variation in large steel forgings, the effects of forging reduction on mechanical and metallurgical properties were examined. The related work previously conducted at Watervliet has been appropriately summarized in a recent report, WVT-TR-74001. The present study deals specifically with the metallurgical consequences of solidification and mechanical working. Accordingly, the aspects of nonmetallic inclusions, chemical homogeneity and microstructure were considered. For the range of forging reductions investigated (1.5:1 - 10:1); a reduction ratio of approximately 3:1 produced optimum average values in % RA, Charpy impact strength and fracture toughness. Also, the significant variations statistically determined in these parameters was accompanied by real variation in carbon concentration. Therefore, carbon segregation on a macroscale, is shown to be a major contributor to mechanical property variation in large steel forgings.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1975
Accession Number
ADA025807

Entities

People

  • Peter Thornton
  • Vito J. Colangelo

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Weapons Technologies

DTIC Thesaurus Topics

  • Analysis Of Variance
  • Chemical Elements
  • Chemistry
  • Homogeneity
  • Impact Strength
  • Inclusions
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Microstructure
  • Reduction Of Area
  • Security
  • Solidification
  • Statistical Analysis
  • Tensile Strength
  • Toughness
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Theoretical Analysis.