Effects of Microstructure, Composition, and Strength on the Nil Ductility Transition (NDT) Temperature of HY-80 Steel

Abstract

Steel from 22 heats of low-carbon Ni-Cr-Mo steel, HY-80 (ASTM a543-65, and MIL-S-16216G (Ships)) was heat treated to study the effects on the drop weight nil ductility transition (NDT) temperature of (1) commercial variation in composition and inclusion content, (2) variation in microstructure such as prior austenitic grain size and the relative amount of isothermally produced ferrite or bainite in a tempered martensitic matrix, and (3) the observed variation in strength obtained after a one-hour 1150 deg F temper followed by water quench to prevent embrittlement while cooling from the tempering temperature.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
AD0737640

Entities

People

  • Marcel L. Salive

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Alloys
  • Ceramic Materials
  • Chemical Composition
  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Embrittlement
  • Grain Boundaries
  • Grain Size
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Notch Toughness
  • Tensile Strength
  • Transition Temperature
  • Transitions
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Metallurgy