High Temperature Degradation of Powder-processed Ni-based Superalloy

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

High Temperature Degradation of Powder-processed Ni-based Superalloy

Popis výsledku v původním jazyce

The aim of present work is to study the high temperature degradation of the powder-processed polycrystalline superalloy Ni-15Cr-18Co-4Al-3.5Ti-5Mo. This superalloy has been applied as material for grips of a creep machine. The material was exposed at 1100 °C for about 10 days at 10 MPa stress. During the creep test occurred unacceptable creep deformation of grips as well as severe surface oxidation with scales peeling off. Three types of the microstructure were observed in the studied alloy: (i) unexposed state; (ii) heat treated (annealing ? 10 min/ 1200 °C) and (iii) after using as a part of the equipment of the creep machine during the creep test. It is shown that the microstructure degradation resulting from the revealed ?´ phase fcc Ni3(Al,Ti) particles preferentially created at the grain boundaries of the samples after performing creep tests affects mechanical properties of the alloy and represents a significant contribution to all degradation processes affecting performance and

Název v anglickém jazyce

High Temperature Degradation of Powder-processed Ni-based Superalloy

Popis výsledku anglicky

The aim of present work is to study the high temperature degradation of the powder-processed polycrystalline superalloy Ni-15Cr-18Co-4Al-3.5Ti-5Mo. This superalloy has been applied as material for grips of a creep machine. The material was exposed at 1100 °C for about 10 days at 10 MPa stress. During the creep test occurred unacceptable creep deformation of grips as well as severe surface oxidation with scales peeling off. Three types of the microstructure were observed in the studied alloy: (i) unexposed state; (ii) heat treated (annealing ? 10 min/ 1200 °C) and (iii) after using as a part of the equipment of the creep machine during the creep test. It is shown that the microstructure degradation resulting from the revealed ?´ phase fcc Ni3(Al,Ti) particles preferentially created at the grain boundaries of the samples after performing creep tests affects mechanical properties of the alloy and represents a significant contribution to all degradation processes affecting performance and

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materiálové inžinierstvo - Materials Engineering

ISSN

1335-0803

e-ISSN

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Svazek periodika

22

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

10

Strana od-do

85-94

Kód UT WoS článku

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EID výsledku v databázi Scopus

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