Precipitation Behavior and Mechanical Properties of a 16Cr-25Ni Superaustenitic Stainless Steel Weld Metal During Post-weld Heat Treatment

Tian, Wenbin; Wu, Dong; Li, Yiyi; Lu, Shanping

doi:10.1007/s40195-021-01274-6

Cited by 4 publications

(1 citation statement)

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“…11c) displays the source of the "river," which reflects the initiation of cracks from the O/B2 phase boundaries. The B2/O phase boundaries were prone to cause stress concentration and microcracks during tensile deformation [17,34]. By tailoring the heterogeneous microstructure via post-heat treatment or adjusting IFW parameters [16], the premature fracture of the Ti 2 AlNb joints may be suppressed.…”

Section: In-situ Sem Characterization Of Deformation Behaviormentioning

confidence: 99%

Heterogeneous Deformation Behaviors of an Inertia Friction Welded Ti2AlNb Joint: an In-situ Study

Jin

Cai

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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A defect-free Ti 2 AlNb joint has been obtained by the inertia friction welding (IFW) technology. The weld zone (WZ) is composed of B2 grains refined by discontinuous dynamic recrystallization and enhanced by grain refinement strengthening. And the average microhardness decreases by about 30 HV from the WZ to the base metal. In-situ SEM analysis reveals that the heterogeneous structure of the joint causes strong strain partitioning during tensile deformation. The microcrack initiation occurs at the interface of the initial B2 phases and B2/O boundaries. Owing to stress concentration, the multi-slip bands and cracks tend to generate in the heat-affected zone (HAZ), causing a premature fracture.

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Section: In-situ Sem Characterization Of Deformation Behaviormentioning

confidence: 99%