The Effect of Temperature and Phase Shift on the Thermomechanical Fatigue of Nickel-Based Superalloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F22%3A00558952" target="_blank" >RIV/68081723:_____/22:00558952 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2075-4701/12/6/993" target="_blank" >https://www.mdpi.com/2075-4701/12/6/993</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met12060993" target="_blank" >10.3390/met12060993</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Effect of Temperature and Phase Shift on the Thermomechanical Fatigue of Nickel-Based Superalloy

Popis výsledku v původním jazyce

In this paper, the minimum temperature and phase shift effects on the thermo-mechanical fatigue (TMF) behavior of Inconel 713LC are investigated. TMF tests were performed under 0 degrees (in-phase-IP) and +180 degrees (out-of-phase-OP) phase shifts between mechanical strain and temperature. Cylindrical specimens were cycled at constant mechanical strain amplitude with a strain ratio of R-epsilon =1. Tests were performed with temperature ranges of 300-900 degrees C and 500-900 degrees C. The heating and cooling rate was 5 degrees C/s. Fatigue hardening/softening curves and fatigue life data were assessed. Results show that out-of-phase loading was less damaging than in-phase loading. Scanning electron microscopy (SEM) examination of metallographic sections indicated that the life-reducing damage mechanism was intergranular cavitation under in-phase loading. Transmission electron microscopy (TEM) revealed honeycomb structures for IP loading. The plastic strain localization into persistent slip bands was typical for OP loading. For out-of-phase loading, fatigue damage appeared to be dominant. The increase in the temperature range led to a significant decrease in fatigue life. The reduction of fatigue life was far more pronounced for out-of-phase loading. This can be ascribed to the accelerated crack propagation at high tensile stress under out-of-phase loading as well as the amount of accommodated plastic strain deformation. Based on the SEM scrutiny of metallographic sections and TEM observations of dislocation arrangement, the prevailing damage mechanisms were documented and the lifetime behavior was accordingly discussed.

Název v anglickém jazyce

The Effect of Temperature and Phase Shift on the Thermomechanical Fatigue of Nickel-Based Superalloy

Popis výsledku anglicky

In this paper, the minimum temperature and phase shift effects on the thermo-mechanical fatigue (TMF) behavior of Inconel 713LC are investigated. TMF tests were performed under 0 degrees (in-phase-IP) and +180 degrees (out-of-phase-OP) phase shifts between mechanical strain and temperature. Cylindrical specimens were cycled at constant mechanical strain amplitude with a strain ratio of R-epsilon =1. Tests were performed with temperature ranges of 300-900 degrees C and 500-900 degrees C. The heating and cooling rate was 5 degrees C/s. Fatigue hardening/softening curves and fatigue life data were assessed. Results show that out-of-phase loading was less damaging than in-phase loading. Scanning electron microscopy (SEM) examination of metallographic sections indicated that the life-reducing damage mechanism was intergranular cavitation under in-phase loading. Transmission electron microscopy (TEM) revealed honeycomb structures for IP loading. The plastic strain localization into persistent slip bands was typical for OP loading. For out-of-phase loading, fatigue damage appeared to be dominant. The increase in the temperature range led to a significant decrease in fatigue life. The reduction of fatigue life was far more pronounced for out-of-phase loading. This can be ascribed to the accelerated crack propagation at high tensile stress under out-of-phase loading as well as the amount of accommodated plastic strain deformation. Based on the SEM scrutiny of metallographic sections and TEM observations of dislocation arrangement, the prevailing damage mechanisms were documented and the lifetime behavior was accordingly discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20306 - Audio engineering, reliability analysis

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Metals

ISSN

2075-4701

e-ISSN

2075-4701

Svazek periodika

12

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

993

Kód UT WoS článku

000816317300001

EID výsledku v databázi Scopus

2-s2.0-85131562462