High-Temperature Tensile Behaviour of GTAW Joints of P92 Steel and Alloy 617 for Two Different Fillers-Reference-Cited by-同舟云学术

High-Temperature Tensile Behaviour of GTAW Joints of P92 Steel and Alloy 617 for Two Different Fillers

Published:2023-08-28 Issue:17 Volume:16 Page:5880
ISSN:1996-1944
Container-title:Materials
language:en
Short-container-title:Materials

Author:

Kumar Amit¹^ORCID,Sirohi Sachin²^ORCID,Pandey Shailesh Mani³,Kumar Pradeep⁴,Fydrych Dariusz⁵^ORCID,Pandey Chandan¹^ORCID

Affiliation:

1. Mechanical Department, Indian Institute of Technology Jodhpur, N.H. 62 Nagaur Road, Karwar 342037, India

2. Mechanical Department, SRM Institute of Science and Technology, Delhi NCR Campus, Modinagar 201204, India

3. Department of Mechanical Engineering, National Institute of Technology, Patna 800005, India

4. Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247667, India

5. Institute of Manufacturing and Materials Technology, Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Gabriela Narutowicza Street 11/12, 80-233 Gdańsk, Poland

Abstract

This study explores the high-temperature (HT) tensile rupture characteristics of a dissimilar gas-tungsten-arc-welded (GTAW) joint between P92 steel and Alloy 617, fabricated using ER62S-B9 and ERNiCrCoMo-1 fillers. The high-temperature tensile tests were performed at elevated temperatures of 550 °C and 650 °C. An optical microscope (OM) and a field emission scanning electron microscope (FESEM) were utilized to characterize the joint. The high-temperature test results indicated that the specimen failed at the P92 base metal/intercritical heat-affected zone (ICHAZ) rather than the weld metal for the ERNiCrCoMo-1(IN617) filler. This finding confirmed the suitability of the joint for use in the Indian advanced ultra-supercritical (A-USC) program. The fracture surface morphology and presence of precipitates were analysed using an SEM equipped with energy dispersive spectroscopy (EDS). The appearance of the dimples and voids confirmed that both welded fillers underwent ductile–dominant fracture. EDS analysis revealed the presence of Cr-rich M23C6 phases, which was confirmed on the fracture surface of the ER62S-B9 weld (P92-weld). The hardness plot was analysed both in the as-welded condition and after the fracture.

Funder

Indian Institute of Technology Jodhpur, India

Publisher

MDPI AG

Subject

General Materials Science

Link

https://www.mdpi.com/1996-1944/16/17/5880/pdf

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