Abstract

The effects of varying rotational speed and inertia on the mechanical properties and microstructural evolution in 8630M low-alloy steel during inertia friction welding (IFW) were investigated. The results show that increasing rotational speed and decreasing inertia magnitude detrimentally affect the weld’s mechanical properties. Microstructural observations suggest that the temperature in the weld zone (WZ) and thermo-mechanically affected zone (TMAZ) reached Ac3 and in-between Ac1-Ac3, whereas that of the HAZ stayed below Ac1. Microstructure of the weld was dominated by simple shear texture rotated under the influence of the compression at early stages of IFW, implying that the deformation was a combination of shear and compression.

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