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Experimental and numerical investigation of the weld repair of superplastic forming dies

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Academic year: 2021

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Fig. 1. SEM micrographs showing the structure of the high carbon alloy (a) and low carbon alloy (b) and TEM micrograph of a M 23 C 6 secondary carbide precipitated in both alloys (c) [M = Cr, W or Nb].
Fig 3a shows a series of Vickers microhardness indents from the welded joint to the base material across the inter-face in the case of the high carbon alloy
Fig. 4. High carbon material, SEM micrographs showing the interfacial zone between the metal and the weld bead (a) and the detail of the carbide precipitation in the weld bead (b).
Fig. 6. Low carbon alloy weld-repaired with Inco625: (a) macrograph of the weld bead; (b) SEM micrograph showing the interfacial zone between the weld bead and the metal.
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