Characterisation of dissimilar P91 and P92 steel welds joint. (4th July 2019)

• Record Type: Journal Article
• Authors: Pandey, Chandan; Mahapatra, Manas Mohan; Kumar, Pradeep
• Is Part Of: Materials at high temperatures. Volume 36:Number 4(2019)
• Page Start: 275
• Page End: 284
• Publication Date: 2019-07-04
• Subjects: Autogenous-TIG -- hardness -- Charpy toughness -- microstructure -- weldments; Materials at high temperatures -- Periodicals; High temperatures -- Periodicals; 620.1121705
• DOI: 10.1080/09603409.2018.1537168
• Languages: English
• ISSNs: 0960-3409

Abstract

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.