Characterization of an HY-130 Steel Weldment by Transmission Electron Microscopy.

Abstract

A wrought HY-130 steel weldment was studied to provide information about metallurgical differences in the weld heat affected zone (HAZ). Three GMAW welded areas were mapped and analyzed: heavily tempered, moderately tempered and untempered regions. Transverse sections were cut along the weld HAZ and the section microhardness compared with a previous microhardness traverse across the region to determine the location within the HAZ. Transmission electron microscopy revealed the occurrence of significant metallurgical changes from the fusion line to the HAZ/base metal interface. Microstructures were found to be similar to those of a low carbon steel, changing from a fine lath martensite at the HAZ/base metal interface to a mixture of upper bainite and fine lath martensite in the HAZ near the fusion line and finally to lower (acicular) bainite in the weld metal. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1981
Accession Number
ADA114451

Entities

People

  • Wallace Michael Elger

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Base Metal
  • Blast Testing
  • Chemistry
  • Electron Microscopes
  • Electron Microscopy
  • Hardness
  • Heat Treatment
  • Hydrogen Embrittlement
  • Martensite
  • Materials
  • Materials Engineering
  • Measurement
  • Mechanical Properties
  • Microscopes
  • Microscopy
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics