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Characterization of an HY-130 steel weldment by transmission electron microscopy.

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Author
Elger, Wallace Michael
Date
1981-12
Advisor
Challenger, Kenneth D.
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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.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/20450
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  • 1. Thesis and Dissertation Collection, all items
NPS Dudley Knox LibraryDUDLEY KNOX LIBRARY
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