Microstructurally sensitive crack nucleation around inclusions in powder metallurgy nickel-based superalloys

Jiang, Jun; Yang, Jie; Zhang, T.; Zou, Jixing; Wang, Y.; Dunne, Fionn P.E.; Britton, T. Ben

doi:10.1016/j.actamat.2016.07.023

Cited by 114 publications

(39 citation statements)

References 45 publications

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“…Recently, GND concept is used widely to understand the deformation mechanism, strain hardening and recrystallization in various materials such as pure copper [31], titanium [18] and nickel-based superalloys [19]. It has also been reported that there is direct correlation between high GND density…”

Section: On the Role Of MC Carbides And Mc Oxide In Lcf Deformation Mmentioning

confidence: 99%

“…and LCF crack initiation and propagation in inclusion-containing superalloys [19,20]. According to Stroh [32], the dislocation pile-up leads to crack nucleation as they increase the local shear stress which facilitates nucleation of a micro-cracks.…”

Section: On the Role Of MC Carbides And Mc Oxide In Lcf Deformation Mmentioning

confidence: 99%

“…According to Stroh [32], the dislocation pile-up leads to crack nucleation as they increase the local shear stress which facilitates nucleation of a micro-cracks. However, it is argued that dislocations cannot be a sole criterion for crack initiation as high GND are not limited to crack initiation sites [19]. Based on the concept and evaluation of stored energy [33], the dual role of GNDs in fracture process was proposed by Jiang et al [19]: On one hand, GNDs accumulation can lead to local hardening and increasing the critical resolved shear stress.…”

Section: On the Role Of MC Carbides And Mc Oxide In Lcf Deformation Mmentioning

confidence: 99%

“…Britton et al [18] confirmed the pile-up of dislocations at the intersection of slip bands and grain boundary, and further validate a dislocation mechanics by revealing elastic stress state ahead of the pile-up. By utilising HR-EBSD and/or High Resolution Digital Image Correlation (HR-DIC) technique, Jiang et al [19,20] revealed a direct relationship between dislocation density and fatigue crack nucleation in nickel-based superalloy containing non-metallic inclusions. Thus, HR-EBSD seems to be a promising tool in understanding the relationship between strain inhomogeneity, orientation gradients and GND accommodations as well as their interactions with microstructures during plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

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The effects of microstructure and microtexture generated during solidification on deformation micromechanism in IN713C nickel-based superalloy

et al. 2018

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Section: On the Role Of MC Carbides And Mc Oxide In Lcf Deformation Mmentioning

confidence: 99%

Section: On the Role Of MC Carbides And Mc Oxide In Lcf Deformation Mmentioning

confidence: 99%

Section: On the Role Of MC Carbides And Mc Oxide In Lcf Deformation Mmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effects of microstructure and microtexture generated during solidification on deformation micromechanism in IN713C nickel-based superalloy

et al. 2018

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“…We have developed a simple and effective surface coating method that was first reported by Jiang et al 17 where nanosize ($250 nm) silica particles were stably and uniformly applied onto the free surface of the samples. 17,21,22 These nanosize particles enable spatial high-resolution strain measurements as these highcontrast features are imaged at high-image magnifications. SEM-based imaging of the surface displacement field using our in-house MATLAB-based DIC codes enables us to obtain high-resolution, fullfield strain maps.…”

Section: Characterization Modeling and Test Methodsmentioning

confidence: 99%

Toward Predictive Understanding of Fatigue Crack Nucleation in Ni-Based Superalloys

Jiang

Dunne

Britton

2017

JOM

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Predicting when and where materials fail is a holy grail for structural materials engineering. Development of a predictive capability in this domain will optimize the employment of existing materials, as well as rapidly enhance the uptake of new materials, especially in high-risk, high-value applications, such as aeroengines. In this article, we review and outline recent efforts within our research groups that focus on utilizing full-field measurement and calculation of micromechanical deformation in Ni-based superalloys. In paticular, we employ high spatial resolution digital image correlation (HR-DIC) to measure surface strains and a high-angular resolution electron backscatter diffraction technique (HR-EBSD) to measure elastic distortion, and we combine these with crystal plasticity finite element (CPFE) modeling. We target our studies within a system of samples that includes single, oligo, and polycrystals where the boundary conditions, microstructure, and loading configuration are precisely controlled. Coupling of experiment and simulation in this manner enables enhanced understanding of crystal plasticity, as demonstrated with case studies in deformation compatibility; spatial distributions of slip evolution; deformation patterning around microstructural defects; and ultimately development of predictive capability that probes the location of microstructurally sensitive fatigue cracks. We believe that these studies present a careful calibration and validation of our experimental and simulation-based approaches and pave the way toward new understanding of crack formation in engineering alloys.

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Mechanical Properties of Powder Metallurgy Nickel‐Based Superalloy Composite Reinforced by Low Content Graphene Nanosheets

et al. 2020

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Metals and their alloys have been widely used in aerospace, automotive, and chemical industries due to their excellent mechanical properties. [1][2][3] New materials are developed with higher performance to meet more critical working environment. One of the common strategy is to use metal or its alloy as matrix to form metal matrix composites (MMCs) by adding reinforcements such as fibers, whiskers, and particles to achieve optimized performance. [1,4] These reinforcements improve the tensile properties of the alloy, but always sacrifice its plasticity at the same time.Graphene [5,6] is an extraordinary sp 2hybridized nanocarbon material with 2D single-layer structure. Due to its excellent fracture strength (up to %130 GPa), ultrahigh Young's modulus (%1.0 TPa), and high hardness with low density, graphene is considered to be one of the most potential new generation carbon materials in many fields. [7][8][9] In consideration of the complicated fabrication process and the high cost of single-atomic-layer graphene, multilayer graphene nanosheets (GNSs) show wider application potentials. [10][11][12] GNSs have been successfully used to reinforce metallic materials such as aluminum, [13,14] magnesium, [15,16] and copper [17,18] with dramatically improvement of their mechanical properties, such as tensile strength, hardness, and wear behaviors. [19][20][21] Zhou et al. [22] fabricated an aluminum-based composite at 0.4 vol% addition of graphene, and the ultimate tensile strength (UTS) and yield strength (YS) of the composite increased by 33.1% and 32.7%, respectively. Jang et al. [23] produced a 0.5 vol% grapheme-reinforced copper alloy, and around 4 times enhancement of their mechanical properties was achieved. Mu et al. [24] prepared a grapheme-reinforced pure titanium alloy, which exhibited an excellent UTS of þ40% compared to the monolithic alloy.Strengthening by GNSs as an ideal reinforcement material is an important method for improving the mechanical properties of light metallic materials. Compared with the conventional metals, GNSs-reinforced MMCs have extensive applications in many fields due to their excellent properties. Nickel and its alloys have been widely used in gas turbines and aeroengine due to their

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Microstructurally sensitive crack nucleation around inclusions in powder metallurgy nickel-based superalloys

Cited by 114 publications

References 45 publications

The effects of microstructure and microtexture generated during solidification on deformation micromechanism in IN713C nickel-based superalloy

The effects of microstructure and microtexture generated during solidification on deformation micromechanism in IN713C nickel-based superalloy

Toward Predictive Understanding of Fatigue Crack Nucleation in Ni-Based Superalloys

Mechanical Properties of Powder Metallurgy Nickel‐Based Superalloy Composite Reinforced by Low Content Graphene Nanosheets

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