Influence of chromium on the mechanical properties and microstructure of weld metal from a high-strength SMA electrode
- Conarco Alambres y Soldaduras, Buenos Aires (Argentina)
- Intema, Buenos Aires (Argentina)
- Fundacion Latinoameriacana de Soldadura, Buenos Aires (Argentina)
In the present work, the influence of Cr on mechanical properties and microstructure of weld metal from a high-strength SMA electrode is analyzed by considering 12 experimental low-alloy low-hydrogen iron powder AWS E10018, E11018, E12018-M type covered electrodes. These electrodes were manufactured to obtain in the weld deposits Cr contents ranging from 0 to 1.8%, with two different Mn levels for each Cr content, maintaining the amount of other elements at a fixed value. All-weld-metal specimens and production type single V-groove welds were mechanically tested in the as-welded and stress-relieved conditions, and a metallographic study was conducted. Chromium was found to be deleterious to toughness with only a minor influence due to Mn variations. A postweld heat treatment led in all cases to a reduction of toughness. Increasing Cr content in the welds produced a higher proportion of acicular ferrite and a general refinement of the microstructure.
- OSTI ID:
- 5047948
- Journal Information:
- Welding Journal (Miami); (United States), Vol. 73:3; ISSN 0043-2296
- Country of Publication:
- United States
- Language:
- English
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