Plastic Deformation of a Nano‐Precipitate Strengthened Ni‐Base Alloy Investigated by Complementary In Situ Neutron Diffraction Measurements and Molecular‐Dynamics Simulations

Huang, E-Wen; Csiszár, Gábor; Lo, Yu‐Chieh; Huang, Yu Lih; Lee, Wen Jay; Ungár, Tamás; Liaw, Peter K.

doi:10.1002/adem.201200057

Cited by 14 publications

(10 citation statements)

References 25 publications

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“…Our earlier work on the annealed sample without nano precipitates also shows that there are dislocation grouping within dislocation walls and other dislocations remain randomly distributed in this nickel‐based superalloy . Similarly, for the studied system with nano precipitates, the aforementioned dislocation walls and randomly distributed dislocations are also the major microstructure when the nickel‐based superalloy subjected to plastic deformation …”

Section: Resultssupporting

confidence: 57%

“…The sufficient amount of the precipitates and different crystal structure yield clearly different groups of diffraction peaks from those of the matrix. Diffraction peaks from the precipitates and the matrix can be clearly indexed . Peak positions of lattice‐plane hkl are refined for the calculations of the lattice strain as shown in Equation .…”

Section: Resultsmentioning

confidence: 99%

“…Peak positions of lattice‐plane hkl are refined for the calculations of the lattice strain as shown in Equation . The (111) peak of the matrix and the (011) peak of the nano precipitates are shown because they are representative

ε^{h k l} = \frac{d^{h k l} - {d^{h k l}}_{0}}{{d^{h k l}}_{0}} \times 10^{6} ((), μ e) .

…”

Section: Resultsmentioning

confidence: 99%

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Fatigue induced deformation and thermodynamics evolution in a nano particle strengthened nickel base superalloy

Huang

Chang

Liaw

et al. 2016

Fatigue Fract Eng Mat Struct

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In‐situ neutron‐diffraction and temperature measurements were simultaneously applied to investigate low‐cycle‐fatigue behaviour of a nano‐precipitate strengthened nickel‐based superalloy. Two transitions in the temperature‐evolution are observed subjected to cyclic loading. Two models are compared with the measured temperature evolution. One is based on bulk stress, and the other is based on lattice‐strain evolution. The calculated thermoelastic responses in both models qualitatively agree with the measured bulk‐temperature evolution for the first transition. The in‐situ neutron‐diffraction results reveal that the first transition is associated with the cyclic hardening/softening dislocation‐structural transformation. However, the second transition, which is observed at larger number of fatigue cycles during the steady cycles, does not correlate with the dislocation evolution. A phenomenological model is applied to describe the second temperature‐transition stages. The energy dissipation evolutions in the second fatigue stage indicate the initiation and the growth activities of fatigue microcrack. The data reported here may be useful for cohesive zone model.

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Section: Resultssupporting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

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Fatigue induced deformation and thermodynamics evolution in a nano particle strengthened nickel base superalloy

Huang

Chang

Liaw

et al. 2016

Fatigue Fract Eng Mat Struct

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“…Other benefits of SANS again include the ability to use complex sample environments, for example to measure samples under applied load. 126 In addition to SANS deriving from interactions of the neutron beam with the nuclei within a material, neutrons also scatter from atomic magnetic moments. This is not so important for the examples described in the previous sections, but is clearly important when using SANS to characterise steels.…”

Section: Precipitates and Clustersmentioning

confidence: 99%

Practical applications of small-angle neutron scattering

Hollamby

2013

Phys. Chem. Chem. Phys.

120

116

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Recent improvements in beam-line accessibility and technology have led to small-angle neutron scattering (SANS) becoming more frequently applied to materials problems. SANS has been used to study the assembly, dispersion, alignment and mixing of nanoscale condensed matter, as well as to characterise the internal structure of organic thin films, porous structures and inclusions within steel.Using time-resolved SANS, growth mechanisms in materials systems and soft matter phase transitions can also be explored. This review is intended for newcomers to SANS as well as experts. Therefore, the basic knowledge required for its use is first summarised. After this introduction, various examples are given of the types of soft and hard matter that have been studied by SANS. The information that can be extracted from the data is highlighted, alongside the methods used to obtain it. In addition to presenting the findings, explanations are provided on how the SANS measurements were optimised, such as the use of contrast variation to highlight specific parts of a structure. Emphasis is placed on the use of complementary techniques to improve data quality (e.g. using other scattering methods) and the accuracy of data analysis (e.g. using microscopy to separately determine shape and size). This is done with a view to providing guidance on how best to design and analyse future SANS measurements on materials not listed below.

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“…Neutron diffraction was used to characterize the structural properties, whereas the tensile test was performed to determine the mechanical properties of the 3D-printed Ti-6Al-4V and Ti-6Al-4V doped with BG specimens. The protocols of in-situ neutron diffraction for examination of the microstructure evolution of the tensile specimens are archived [ 52 , 53 , 54 ]. The tensile specimens of Ti-6Al-4V and Ti-6Al-4V doped with BG powders were horizontally built into dog-bone shapes by using the SLM technique with a gauge length of 10 mm and a gauge radius of 3 mm.…”

Section: Methodsmentioning

confidence: 99%

Investigation of Bone Growth in Additive-Manufactured Pedicle Screw Implant by Using Ti-6Al-4V and Bioactive Glass Powder Composite

Lam

Trinh

Huang

et al. 2020

IJMS

Self Cite

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In this study, we optimized the geometry and composition of additive-manufactured pedicle screws. Metal powders of titanium-aluminum-vanadium (Ti-6Al-4V) were mixed with reactive glass-ceramic biomaterials of bioactive glass (BG) powders. To optimize the geometry of pedicle screws, we applied a novel numerical approach to proposing the optimal shape of the healing chamber to promote biological healing. We examined the geometry and composition effects of pedicle screw implants on the interfacial autologous bone attachment and bone graft incorporation through in vivo studies. The addition of an optimal amount of BG to Ti-6Al-4V leads to a lower elastic modulus of the ceramic-metal composite material, effectively reducing the stress-shielding effects. Pedicle screw implants with optimal shape design and made of the composite material of Ti-6Al-4V doped with BG fabricated through additive manufacturing exhibit greater osseointegration and a more rapid bone volume fraction during the fracture healing process 120 days after implantation, per in vivo studies.

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Plastic Deformation of a Nano‐Precipitate Strengthened Ni‐Base Alloy Investigated by Complementary In Situ Neutron Diffraction Measurements and Molecular‐Dynamics Simulations

Cited by 14 publications

References 25 publications

Fatigue induced deformation and thermodynamics evolution in a nano particle strengthened nickel base superalloy

Fatigue induced deformation and thermodynamics evolution in a nano particle strengthened nickel base superalloy

Practical applications of small-angle neutron scattering

Investigation of Bone Growth in Additive-Manufactured Pedicle Screw Implant by Using Ti-6Al-4V and Bioactive Glass Powder Composite

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