Microstructure of welded and weld-simulated 3Cr-1. 5Mo-0. 1V ferritic steel

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Metallurgical Transactions, B (Process Metallurgy); (United States)

OSTI ID:7267249

Vitek, J M; David, S A ^[1]

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1. Oak Ridge National Lab., TN (United States)

Ferritic steels are often used in thick-plate form. The feasibility of electron-beam welding such thick plates and the mechanical properties of these welds were examined, and microstructures of these welds were evaluated. The study was carried out on a 3Cr-1.5Mo-0.1V steel. Weld simulations were used to aid in the study of the heat-affected zone (HAZ) microstructure. Such simulations allowed for a more reliable and detailed evaluation of the variation in microstructure with distance from the fusion line. The structures were related to microhardness measurements made across the width of the weld and the HAZ. The fusion zone and the immediately adjacent HAZ consisted of bainite platelets with narrow films of retained austenite at many of the bainite platelet boundaries. Farther away from the fusion zone, the structure was a two-phase mixture of bainitic platelets and ferrite produced by heating base metal between the Ac{sub 1} and the Ac{sub 3} temperatures. Still farther from the weld, the structure consisted of tempered bainite, with the degree of tempering decreasing with distance from the fusion line.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7267249
• Journal Information: Metallurgical Transactions, B (Process Metallurgy); (United States), Journal Name: Metallurgical Transactions, B (Process Metallurgy); (United States) Vol. 21A; ISSN 0360-2141; ISSN MTTBC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
BAINITE
CARBON ADDITIONS
CHROMIUM-MOLYBDENUM STEELS
CRYSTAL STRUCTURE
DIMENSIONS
ELECTRON BEAM WELDING
FABRICATION
FERRITE
FERRITIC STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MICROSTRUCTURE
PLATES
STEELS
THICKNESS
VANADIUM ADDITIONS
VANADIUM ALLOYS
WELDING