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

Journal Article · Mon Aug 01 00:00:00 EDT 1983 · Welding Journal, Research Supplement; (United States)

OSTI ID:6316787

Kim, H J; Morris, Jr, J W

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.

• Research Organization: Lawrence Berkeley Lab., CA
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6316787
• Journal Information: Welding Journal, Research Supplement; (United States), Journal Name: Welding Journal, Research Supplement; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

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