skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Toughness in HSLA steel weldments

Abstract

This study has demonstrated that Nb exerts a strong influence on the microstructure of weldments produced in HSLA steel for a range of cooling times representative of seam welds in line pipe. Through this influence a lath microstructure, characterized by low angle boundaries between laths and the absence of boundary ferrite, results. This microstructure understandably has poor impact properties. V exerts considerably less influence on weld metal microstructure. In fact the acicular ferrite structure surrounded by boundary ferrite characteristic of micro-alloy-free weld metal seems little affected by V content. As a result the impact properties of these weld metals are superior to those containing > 0.2% Nb. Mo exhibits a salutary effect in this microstructure by reducing the amount of boundary ferrite.

Authors:
;
Publication Date:
Research Org.:
Union Carbide Corp., Tarrytown, NY
OSTI Identifier:
6391471
Resource Type:
Journal Article
Journal Name:
Weld. Res. Abroad; (United States)
Additional Journal Information:
Journal Volume: 24:8
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FILLER METALS; FRACTURE PROPERTIES; MICROSTRUCTURE; MANGANESE ALLOYS; WELDED JOINTS; STEELS; MECHANICAL PROPERTIES; NIOBIUM ADDITIONS; PLATES; VANADIUM ADDITIONS; ALLOYS; CRYSTAL STRUCTURE; IRON ALLOYS; IRON BASE ALLOYS; JOINTS; NIOBIUM ALLOYS; VANADIUM ALLOYS; 360101* - Metals & Alloys- Preparation & Fabrication; 360102 - Metals & Alloys- Structure & Phase Studies; 360103 - Metals & Alloys- Mechanical Properties

Citation Formats

Levine, E, and Hill, D C. Toughness in HSLA steel weldments. United States: N. p., 1978. Web.
Levine, E, & Hill, D C. Toughness in HSLA steel weldments. United States.
Levine, E, and Hill, D C. Sun . "Toughness in HSLA steel weldments". United States.
@article{osti_6391471,
title = {Toughness in HSLA steel weldments},
author = {Levine, E and Hill, D C},
abstractNote = {This study has demonstrated that Nb exerts a strong influence on the microstructure of weldments produced in HSLA steel for a range of cooling times representative of seam welds in line pipe. Through this influence a lath microstructure, characterized by low angle boundaries between laths and the absence of boundary ferrite, results. This microstructure understandably has poor impact properties. V exerts considerably less influence on weld metal microstructure. In fact the acicular ferrite structure surrounded by boundary ferrite characteristic of micro-alloy-free weld metal seems little affected by V content. As a result the impact properties of these weld metals are superior to those containing > 0.2% Nb. Mo exhibits a salutary effect in this microstructure by reducing the amount of boundary ferrite.},
doi = {},
journal = {Weld. Res. Abroad; (United States)},
number = ,
volume = 24:8,
place = {United States},
year = {1978},
month = {10}
}