Results 31 to 40 of about 2,044 (211)

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Energy-Composition Relations in Ni₃(Al_1−xX_x) Phases

Crystals, 2023
The secondary phase, such as Ni3Al-based L12 γ′, is crucially important for the precipitation strengthening of superalloys. Composition–structure–property relations provide useful insights for guided alloy design.
Nikolai A. Zarkevich, Timothy M. Smith, John W. Lawson   +2 more
doaj   +1 more source

EBSD Study of Delta-Processed Ni-Based Superalloy [PDF]

Metals, 2020
Nickel-based superalloys are extensively used in the aerospace and power generation industries due to their excellent mechanical properties at elevated temperatures and good corrosion resistance. Typically, these alloys require accomplishing critical standards during their manufacturing process. In this study, an Inconel 718 (IN718) Ni-based superalloy
Pedro Jacinto Páramo Kañetas, Jessica Calvo, Pablo Rodriguez-Calvillo, José María Cabrera Marrero, Marco Antonio Zamora Antuñano, Martha Patricia Guerrero-Mata   +5 more
openaire   +3 more sources

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Effect of the Ni/Co ratio on the structural and initial oxidation properties of NiCo-based superalloys revealed by in situ microscopy

Journal of Materials Research and Technology
Oxidation is one of the main failure modes of superalloys, and the initial oxidation of a superalloy provides clues for its failure analysis. NiCo-based superalloys exhibit superior mechanical properties, but their oxidation behaviour is still debatable,
Yunsong Zhao, Mingzhe Liu, Junbo Zhao, Hui Lu, Shanshan Liu, Yanhui Chen, Dawei Pang, Lilin Xie, Ang Li, Lihua Wang   +9 more
doaj   +1 more source

Molecular dynamics simulations of dynamics mechanical behavior and interfacial microstructure evolution of Ni-based single crystal superalloys under shock loading

Journal of Materials Research and Technology, 2021
In this paper, molecular dynamics simulations are performed to study the dynamic mechanical response and microstructural evolution of Ni-based single crystal superalloys under different shock velocities. The results show that when the shock velocity (Up ≤
Bin Chen, Wen-Ping Wu
doaj   +1 more source

L-PBF And DED Processing Of A Ni-based Superalloy

World PM2022 Proceedings, 2022
Different AM technologies such as PBF-LB and DED do become really attractive for both repair and 3D part manufacturing. In particular, extensive work is in progress for the non weldable nickel-based superalloys which tend to exhibit cracks due to residual stresses build-up during AM thermal cycles.
Thomas, M, Charkaluk, Eric, Solas, Denis, Szmytka, Fabien, Locq, Didier, Morel, Ariel, Hubert, Olivier, Muller, Nicolas, Tournier, Christophe   +8 more
openaire   +2 more sources

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

Advanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu, Xun Zhang, Jack M. Donoghue, Albert D. Smith, Rahul Unnikrishnan, Rhys Thomas, Vahid Nekouie, Jie Luo, Dongchen Hu, Michael Preuss, Philip J. Withers   +10 more
wiley   +1 more source

Oxidation resistance of three Ni-based powder metallurgy superalloys

Journal of Aeronautical Materials
The oxidation resistance of FGH4097，FGH4099，and a new Ni-based powder metallurgy (PM) superalloy FGHXX at 750-1100 ℃ is investigated by isothermal oxidation tests on the basis of FGH4095 and FGH4096 superalloys.
WANG Yu, WANG Mingli, XU He, LIU Yufeng, ZHOU Lei   +4 more
doaj   +1 more source