On the rejuvenation of crept Ni-Base single crystal superalloys (SX) by hot isostatic pressing (HIP)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00510350" target="_blank" >RIV/68081723:_____/19:00510350 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.msea.2019.04.078" target="_blank" >https://doi.org/10.1016/j.msea.2019.04.078</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2019.04.078" target="_blank" >10.1016/j.msea.2019.04.078</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the rejuvenation of crept Ni-Base single crystal superalloys (SX) by hot isostatic pressing (HIP)

Popis výsledku v původním jazyce

In the present work, we study the effect of HIP rejuvenation treatments on the creep behavior and residual life of a pre-crept single crystal Ni-base superalloy of type CMSX-4. The present work combines miniature creep experiments of precisely oriented [001]tensile creep specimens with HIP treatments and quantitative analysis of scanning and transmission electron micrographs. A HIP-rejuvenation treatment after 5.0% creep pre-strain significantly improves creep strength. However, the microstructural damage induced by the creep pre-deformation could not be fully removed. In a series of sequential creep/HIP/creep-experiments, increasing levels of pre-deformation result in increasing levels of creep rates even after identical HIP-rejuvenation treatments. The memory effect, which causes this phenomenon, is related to an accumulation of permanent microstructural damage, which is not associated with rafting or cavitation. The mechanical results obtained in the present work are interpreted based on microstructural results on the γ/γʼ-microstructure (γ-channel widths and γʼ-size), on the pore population (number density of pores, pore size distributions and pore area fractions)and dislocation substructures which have formed during creep. The results are discussed in the light of previous results reported in the literature.

Název v anglickém jazyce

On the rejuvenation of crept Ni-Base single crystal superalloys (SX) by hot isostatic pressing (HIP)

Popis výsledku anglicky

In the present work, we study the effect of HIP rejuvenation treatments on the creep behavior and residual life of a pre-crept single crystal Ni-base superalloy of type CMSX-4. The present work combines miniature creep experiments of precisely oriented [001]tensile creep specimens with HIP treatments and quantitative analysis of scanning and transmission electron micrographs. A HIP-rejuvenation treatment after 5.0% creep pre-strain significantly improves creep strength. However, the microstructural damage induced by the creep pre-deformation could not be fully removed. In a series of sequential creep/HIP/creep-experiments, increasing levels of pre-deformation result in increasing levels of creep rates even after identical HIP-rejuvenation treatments. The memory effect, which causes this phenomenon, is related to an accumulation of permanent microstructural damage, which is not associated with rafting or cavitation. The mechanical results obtained in the present work are interpreted based on microstructural results on the γ/γʼ-microstructure (γ-channel widths and γʼ-size), on the pore population (number density of pores, pore size distributions and pore area fractions)and dislocation substructures which have formed during creep. The results are discussed in the light of previous results reported in the literature.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/EF16_025%2F0007304" target="_blank" >EF16_025/0007304: Materiály s vnitřní architekturou strukturované pro aditivní technologie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Materials Science and Engineering A-Structural materials

ISSN

0921-5093

e-ISSN

—

Svazek periodika

758

Číslo periodika v rámci svazku

JUN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

202-214

Kód UT WoS článku

000471737800025

EID výsledku v databázi Scopus

2-s2.0-85065550162