Analysis of the microstructure and properties of T92 steel after long-term service
Journal Title: Archives of Materials Science and Engineering - Year 2018, Vol 1, Issue 93
Abstract
Purpose: The purpose of the investigation was to determine and analyse the changes in the microstructure and mechanical properties of the T92 steel after service in creep conditions of the following parameters: temperature – 575°C, pressure – 28.2 MPa, service time – 41914 hrs. Design/methodology/approach: The tests were performed on the test samples taken from a pipe section of a steam superheater after long-term service. The range of the investigations included: microstructural investigation – the optical and SEM microscopy, the analysis of precipitation – carbide isolates, the investigation of mechanical properties: the Vickers hardness measurement, the impact test and static tensile test. Findings: The performed tests showed a slight degree of exhaustion of the structure of the analysed T92 steel. The relatively small changes in the microstructure of the examined steel were reflected in the still retained high mechanical properties. Research limitations/implications: he analysis of the microstructure of the examined steel using SEM was performed to determine the influence of the service on the processes of changes in the precipitate morphology. Practical implications: The metal science investigation of the sections taken from the elements of the power installations after long-term service is one of the basic elements of building the data base of materials and their joints used in the power industry. The results obtained from the performed research constitute a building block for the degradation characteristics of the microstructure and mechanical properties of martensitic steels of the 9-12%Cr type. Originality/value: The results of investigation and analysis of the metallographic and mechanical properties of martensitic T92 steel after long-term service are presented.<br/><br/>
Authors and Affiliations
A. Merda, K Klimaszewska, M. Sroka, P. Wieczorek, G. Golański
Keywords
Related Articles
- EP ID EP402349
- DOI 10.5604/01.3001.0012.6942
- Views 80
- Downloads 0
The influence of silver nanoparticles introduced into RTV-silicone matrix on the activity against Streptococcus mutans
Purpose: The silicone based room temperature vulcanized (RTV) polymers are commonlyused materials for medicine, especially for dentures and maxillofacial prostheses.Unfortunately, the colonization of those materials by p...
The effect of deformation degree on the microstructure of the 6060 aluminium alloy
Purpose: All results obtained in the present study allowed to analyse the changes in the microstructure and texture of the commercial 6060 aluminium alloy, after deformation process by severe plastic deformation. There w...
Optimization and analysis of porosity and roughness in selective laser melting 316L parts
Purpose: The investigations have been carried out on 316L stainless steel parts fabricated by Selective Laser Melting (SLM) technique. The study aimed to determine the effect of SLM parameters on porosity, hardness, and...
Functionalization of technical textile tapes
Purpose: The aim of the study was to deposit a hydrophobic barrier coating on technical tapes in order to protect them from water and to test and assess the obtained products. Design/methodology/approach: The coatings we...
Friction stir processing of the AZ91 magnesium alloy with SiC particles
Purpose: Purpose The main purpose of the research was friction modification by means ofmaterial stirring (FSP – Friction Stir Processing) of the surface layer of the AZ91 magnesiumalloy with SiC particles.Design/methodol...