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Title: Development of a ferritic consumable for welding grain-refined Fe-12Ni-0. 25Ti to retain toughness at 4. 2K

Abstract

Multipass gas tungsten arc welding (GTAW) has been adapted for welding grain-refined Fe-12Ni-0.25Ti steel with a matching ferritic 14% filler metal. The weld is made as a multipass weldment using a single V-groove preparation at heat inputs from 7-17 kJ/cm (18-43 kJ/in.). The ferritic weldment has a strength roughly matching that of the base metal and exhibits excellent toughness both in the weld metal and in the heat-affected zone at temperatures as low as liquid helium temperature (4.2 K, i.e., -452/sup 0/F). The excellent toughness is attributed to two factors: the chemical cleanliness of the GTAW deposit, and the refined microstructure of the weldment and the retention of fine microstructure in the heat-affected zone. Grain refinement is accomplished by the sequential rapid thermal cycles experienced by the material during multipass GTAW welding.

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA
OSTI Identifier:
6316787
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Welding Journal, Research Supplement; (United States)
Additional Journal Information:
Journal Name: Welding Journal, Research Supplement; (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON BASE ALLOYS; GAS TUNGSTEN-ARC WELDING; NICKEL ALLOYS; TITANIUM ALLOYS; WELDED JOINTS; MECHANICAL PROPERTIES; HEAT TREATMENTS; MICROSTRUCTURE; ALLOYS; ARC WELDING; CRYSTAL STRUCTURE; FABRICATION; IRON ALLOYS; JOINING; JOINTS; WELDING; 360101* - Metals & Alloys- Preparation & Fabrication

Citation Formats

Kim, H J, and Morris, Jr, J W. Development of a ferritic consumable for welding grain-refined Fe-12Ni-0. 25Ti to retain toughness at 4. 2K. United States: N. p., 1983. Web.
Kim, H J, & Morris, Jr, J W. Development of a ferritic consumable for welding grain-refined Fe-12Ni-0. 25Ti to retain toughness at 4. 2K. United States.
Kim, H J, and Morris, Jr, J W. 1983. "Development of a ferritic consumable for welding grain-refined Fe-12Ni-0. 25Ti to retain toughness at 4. 2K". United States.
@article{osti_6316787,
title = {Development of a ferritic consumable for welding grain-refined Fe-12Ni-0. 25Ti to retain toughness at 4. 2K},
author = {Kim, H J and Morris, Jr, J W},
abstractNote = {Multipass gas tungsten arc welding (GTAW) has been adapted for welding grain-refined Fe-12Ni-0.25Ti steel with a matching ferritic 14% filler metal. The weld is made as a multipass weldment using a single V-groove preparation at heat inputs from 7-17 kJ/cm (18-43 kJ/in.). The ferritic weldment has a strength roughly matching that of the base metal and exhibits excellent toughness both in the weld metal and in the heat-affected zone at temperatures as low as liquid helium temperature (4.2 K, i.e., -452/sup 0/F). The excellent toughness is attributed to two factors: the chemical cleanliness of the GTAW deposit, and the refined microstructure of the weldment and the retention of fine microstructure in the heat-affected zone. Grain refinement is accomplished by the sequential rapid thermal cycles experienced by the material during multipass GTAW welding.},
doi = {},
url = {https://www.osti.gov/biblio/6316787}, journal = {Welding Journal, Research Supplement; (United States)},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {8}
}