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Characterisation of dissimilar P91 and P92 steel welds joint
, M.M. Mahapatra, P. Kumar
Published in Taylor and Francis Ltd.
2019
Volume: 36
   
Issue: 4
Pages: 275 - 284
Abstract
In the present study, dissimilar weld joint was prepared using the P91 and P92 steel plate of 8-mm thickness, using the multi-pass gas tungsten arc (GTA) welding with filler (weld 1) and autogenous tungsten inert gas welding (A-TIG) process (weld 2). Evolution of δ-ferrite patches was studied in weld zone and heat affected zone (HAZ) for both weld 1 and weld 2. Effect of varying post weld heat treatment (PWHT) duration was also studied on δ-ferrite patches and mechanical properties of the dissimilar weld joint. PWHT was carried out at 760°C. For weld 2, weld zone showed poor impact toughness and higher peak hardness as compared to weld 1. After the PWHT, a considerable reduction in hardness was obtained for both weld 1 and weld 2,while impact toughness of weld zone showed a continuous increment with PWHT duration. For weldments characterisation, optical microscope, scanning electron microscope (SEM) and microhardness tester were utilised. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
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Figures & Tables (8)
  • Figure-0
    Figure 1. (a) P91 and P92 steel plates, (b) A-TIG after first ... Expand
  • Figure-1
    Table 2. Parameters used for making P91 weldment by GTAW process.
  • Figure-2
    Table 3. Summary of welding process used in weld preparation.
  • Figure-3
    Figure 2. Macrograph of dissimilar welded joint: (a) GTA weld ... Expand
  • Figure-4
    Figure 3. Micrograph of weld 1 in as-welded condition: ... Expand
  • Figure-5
    Figure 4. Micrograph of weld 1 after PWHT of 2 h: (a) FGHAZ: ... Expand
  • Figure-6
    Figure 10. (a) Variation in Charpy toughness of weld zone ... Expand
  • Figure-7
    Figure 9. A schematic representation of the effect of grain ... Expand
About the journal
JournalData powered by SciSpaceMaterials at High Temperatures
PublisherData powered by SciSpaceTaylor and Francis Ltd.
ISSN09603409