Mechanism of intermediate temperature embrittlement of Ni and Ni-based superalloys

L Zheng, G Schmitz, Y Meng, R Chellali… - Critical Reviews in …, 2012 - Taylor & Francis
Ni-based superalloys play an important role in aircraft engine propulsion. However, many
experiments demonstrated that these alloys as well as Ni always show ductility loss at …

Precipitation-hardened high-entropy alloys for high-temperature applications: A critical review

B Cao, T Yang, W Liu, CT Liu - MRS Bulletin, 2019 - cambridge.org
Conventional alloy design based on a single primary element has reached its limits in terms
of performance optimization. An alloy design strategy with multi-principal elements has …

Simultaneously improving mechanical properties and oxidation resistance of Ti-bearing high-entropy superalloys at intermediate temperature via silicon addition

S Liu, W **ao, B **ao, J Ju, Y Zhou, Y Zhao… - Journal of Materials …, 2023 - Elsevier
Ti-bearing high-entropy superalloys (HESAs) often suffer from severe intergranular
embrittlement and terrible oxidation degradation at intermediate temperatures. Here we …

Grain size effect on strain localization, slip-grain boundary interaction and damage in the Alloy 718 Ni-based superalloy at 650° C

M Jullien, RL Black, JC Stinville, M Legros… - Materials Science and …, 2024 - Elsevier
Grain size effects on the early plastic strain localization and slip transfer at grain boundaries
were investigated for the Alloy 718 Ni-based superalloy at 650° C. Three microstructures …

Influence of oxide films on primary water stress corrosion cracking initiation of alloy 600

J Panter, B Viguier, JM Cloué, M Foucault… - Journal of Nuclear …, 2006 - Elsevier
In the present study alloy 600 was tested in simulated pressurised water reactor (PWR)
primary water, at 360° C, under an hydrogen partial pressure of 30kPa. These testing …

Oxidation effects on the fatigue crack growth behaviour of alloy 718 at high temperature

R Molins, G Hochstetter, JC Chassaigne, E Andrieu - Acta materialia, 1997 - Elsevier
The purpose of this study was to investigate oxidation assisted crack growth phenomena
encountered in nickel-based alloys at high temperatures. Fatigue crack growth tests …

Intergranular crack tip oxidation mechanism in a nickel-based superalloy

E Andrieu, R Molins, H Ghonem, A Pineau - Materials Science and …, 1992 - Elsevier
This paper is concerned with the intergranular crack tip oxidation mechanism in alloy 718 at
elevated temperatures. The basic concept is based on the ability of the oxygen partial …

Molecular dynamics simulations of the effects of vacancies on nickel self-diffusion, oxygen diffusion and oxidation initiation in nickel, using the ReaxFF reactive force …

C Zou, YK Shin, ACT Van Duin, H Fang, ZK Liu - Acta Materialia, 2015 - Elsevier
A ReaxFF reactive force field was developed for the nickel–oxygen system. The quantum
mechanical (QM) data used to derive the force field parameters included the equations of …

Effect of post fabrication aging treatment on the microstructure, crystallographic texture and elevated temperature mechanical properties of IN718 alloy fabricated by …

S Ozer, GM Bilgin, K Davut, Z Esen… - Journal of Materials …, 2022 - Elsevier
The effect of building direction and post fabrication aging treatment on the microstructure,
crystallographic texture and high temperature mechanical properties of Inconel 718 (IN718) …

Nucleation and growth of cracks and cavities under creep-fatigue interaction

P Rodriguez, KBS Rao - Progress in materials science, 1993 - Elsevier
Low cycle fatigue (LCF) is an important consideration in the design and operation of high
temperature systems that are subjected to repeated thermal stresses as a result of …