A study on as-welded microstructure and mechanical properties of thick-walled 9Cr3W3Co1CuVNbBN martensitic steel weldment

Han, H.G.; Wang, F.; Lu, Y.H.; Han, Y.M.; Chen, Z.Z.

doi:10.1016/j.ijpvp.2023.105077

Cited by 4 publications

(1 citation statement)

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“…However, the effect on the HAZ was noticeable for the material prepared by intensive plastic deformation. The processing promoted a more or less uniform distribution of the alloying elements in fine precipitates (V, Mo, Cr)C. After welding, there was partial dissolution of the alloying elements into the solid solution, and preferential precipitation of carbides rich in Cr (most probably the Cr 23 C 6 type; however, deeper investigation via TEM would be necessary to confirm this presupposition) [68][69][70].…”

Section: Microhardness Evaluationmentioning

confidence: 99%

Influence of Imposed Strain on Weldability of Dievar Alloy

Izák,

Benč,

Kunčická

et al. 2024

Materials

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The presented work is focused on the influence of imposed strain on the weldability of Dievar alloy. Two mechanisms affecting the microstructure and thus imparting changes in the mechanical properties were applied—heat treatment (hardening and tempering), and rotary swaging. The processed workpieces were further subjected to welding with various welding currents. In order to characterize the effects of welding on the microstructure, especially in the heat-affected zone, and determine material stability under elevated temperatures, samples for uniaxial hot compression testing at temperatures from 600 to 900 °C, optical and scanning electron microscopy, and microhardness testing were taken. The testing revealed that, although the rotary swaged and heat-treated samples featured comparable microhardness, the strength of the swaged material was approximately twice as high as that of the heat-treated one—specifically 1350 MPa. Furthermore, it was found that the rotary swaged sample exhibited favorable welding behavior when compared to the heat-treated one, when the higher welding current was applied.

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Section: Microhardness Evaluationmentioning

confidence: 99%