Microstructure and Properties of a Repair Weld in a Nickel Based Superalloy Gas Turbine Component-Reference-Cited by-同舟云学术

Microstructure and Properties of a Repair Weld in a Nickel Based Superalloy Gas Turbine Component

Published:2017-06-27 Issue:2 Volume:17 Page:55-63
ISSN:2083-4799
Container-title:Advances in Materials Science
language:en
Short-container-title:

Author:

Rakoczy Ł.¹,Grudzień M.²,Tuz L.¹,Pańcikiewicz K.¹,Zielińska-Lipiec A.¹

Affiliation:

1. AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Al. Mickiewicza 30, 30-059 Cracow , Poland

2. Foundry Research Institute, Zakopiańska 73, 30-418 Cracow , Poland

Abstract

Abstract The aim of the present study was to characterize the repair weld of serviced (aged) solid-solution Ni-Cr-Fe-Mo alloy: Hastelloy X. The repair welding of a gas turbine part was carried out using Gas Tungsten Arc Welding (GTAW), the same process as for new parts. Light microscopy, scanning electron microscopy, transmission electron microscopy, microhardness measurements were the techniques used to determine the post repair condition of the alloy. Compared to the solution state, an increased amount of M6C carbide was detected, but M23C6 carbides, sigma and mu phases were not. The aged condition corresponds to higher hardness, but without brittle regions that could initiate cracking.

Publisher

Walter de Gruyter GmbH

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