High-temperature low-cycle fatigue behaviour of HIP treated and untreated superalloy MAR-M247

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00467010" target="_blank" >RIV/68081723:_____/16:00467010 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/16:PU121344

Výsledek na webu

<a href="http://dx.doi.org/10.4149/km_2016_6_471" target="_blank" >http://dx.doi.org/10.4149/km_2016_6_471</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4149/km_2016_6_471" target="_blank" >10.4149/km_2016_6_471</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-temperature low-cycle fatigue behaviour of HIP treated and untreated superalloy MAR-M247

Popis výsledku v původním jazyce

The effect of hot isostatic pressing (HIP) treatment on high-temperature low cycle fatigue(LCF) behaviour of γ´ precipitation strengthened nickel-based superalloy MAR-M247 was studied. Microstructural observations revealed coarse-grained dendritic structure with an average grain size of 2.1 mm. Distribution and size of casting defects were assessed on cross sections of both HIP treated and untreated MAR-M247. Shape and size of precipitates were documented. Vickers hardness tests did not reveal differences between both materials. Untreated specimens were cyclically strained under total strain control at 900C. Likewise, tests were performed on the HIP treated material at temperatures of 900 and 950C. The stress- -strain response was recorded. Coffin-Manson and Basquin fatigue life curves were established. HIP treatment leads to an increase of lifetime in comparison with the untreated material. Precipitate depleted zone was observed and crack initiation sites were identified. Dislocation arrangements were studied in TEM. Planar bands containing antiphase boundaries were observed.

Název v anglickém jazyce

High-temperature low-cycle fatigue behaviour of HIP treated and untreated superalloy MAR-M247

Popis výsledku anglicky

The effect of hot isostatic pressing (HIP) treatment on high-temperature low cycle fatigue(LCF) behaviour of γ´ precipitation strengthened nickel-based superalloy MAR-M247 was studied. Microstructural observations revealed coarse-grained dendritic structure with an average grain size of 2.1 mm. Distribution and size of casting defects were assessed on cross sections of both HIP treated and untreated MAR-M247. Shape and size of precipitates were documented. Vickers hardness tests did not reveal differences between both materials. Untreated specimens were cyclically strained under total strain control at 900C. Likewise, tests were performed on the HIP treated material at temperatures of 900 and 950C. The stress- -strain response was recorded. Coffin-Manson and Basquin fatigue life curves were established. HIP treatment leads to an increase of lifetime in comparison with the untreated material. Precipitate depleted zone was observed and crack initiation sites were identified. Dislocation arrangements were studied in TEM. Planar bands containing antiphase boundaries were observed.

Druh

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

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Kovové materiály

ISSN

0023-432X

e-ISSN

—

Svazek periodika

54

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

11

Strana od-do

471-481

Kód UT WoS článku

000390642600009

EID výsledku v databázi Scopus

2-s2.0-85006414857