Overcoming the strength and ductility trade-off in Ni-based alloy through tailoring of bimodal grain structures, hierarchical twins and coherent nanoprecipitates

Y Ban, L Huang, Z Li, Y Li, Y Zhang, J Pan - International Journal of …, 2024 - Elsevier
The longstanding strength-ductility trade-off has posed a significant challenge in materials
science, limiting the potential applications of numerous structural materials. It is crucial to …

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 …

Dislocation distribution, crystallographic texture evolution, and plastic inhomogeneity of Inconel 718 fabricated by laser powder bed fusion

J Al‐Lami, T Dessolier, SR Rogers… - Advanced …, 2024 - Wiley Online Library
Plastic inhomogeneity, particularly localized strain, is one of the main mechanisms
responsible for failures in engineering alloys. This work studies the spatial arrangement and …

Grain size dependence of microscopic strain distribution in a high entropy alloy at the onset of plastic deformation

B Yang, X Xu, D Lunt, F Zhang, MD Atkinson, Y Li… - Acta Materialia, 2025 - Elsevier
The development and distribution of microscopic shear strain have been investigated using
high-resolution digital image correlation at the onset of plastic deformation in face-centred …

Monotonic tension and creep response of electron-beam powder bed fusion processed IN718 superalloy: Role of orthorhombic Ni3Nb δ-phase at grain boundaries

RJ Vikram, ST Reddy, A Kirchner, B Klöden… - Materials Science and …, 2025 - Elsevier
This investigation focuses on examining the deformation behavior of the Inconel 718 (IN718)
superalloy, manufactured via electron-beam powder bed fusion (E-PBF), under both …

Strain Rate Effect on Strain Localization in Alloy 718 Ni-Based Superalloy at Intermediate Temperature

M Jullien, RL Black, JC Stinville, M Legros… - International Symposium …, 2024 - Springer
Abstract Tensile tests on Alloy 718 Ni-based superalloy at 650∘ C at different strain rates
revealed a strain-rate dependency on the fracture mode. A change from intergranular to …

Orientation-related fatigue crack initiation behavior at twin boundary of Inconel 718 in vacuum environment of 650℃

L Liu, Y Gao, X Chen, Z Liu, X Ren, M Zhu - International Journal of Fatigue, 2025 - Elsevier
Complicated interaction of twin boundary with dislocation plays a pivotal role in mechanical
properties. In this study, the effect of TB on the fatigue crack initiation of Inconel 718 …

Superalloys fracture process inference based on overlap analysis of 3D models

X Zhang, G Guo, Z Li, W Meng, Y Zhang, Q Ye… - Communications …, 2024 - nature.com
Superalloy materials exhibit susceptibility to fracture failures stemming from the influence of
thermomechanical factors. To comprehensively understand the fracture mechanisms …

Microplasticity in polycrystalline materials from thermal cycling

A Nascimento, A Pedgaonkar, CA Bronkhorst… - Computational …, 2024 - Springer
In this work, we present a finite deformation, fully coupled thermomechanical crystal
plasticity framework. The model includes temperature dependence in the kinematic …

Optimized Heat Treatment for Electron Beam Powder Bed Fusion Processed IN718: Correlating Microstructure, Texture, and Mechanical Properties

RJ Vikram, A Kirchner, B Klöden… - Advanced Engineering … - Wiley Online Library
This study investigates the microstructure and mechanical properties of Inconel 718 (IN718)
manufactured via electron beam melting (EBM). The EBM‐processed IN718 exhibits a …