Neutron Diffraction Study of Strain/Stress States and Subgrain Defects in a Creep-Deformed, Single-Crystal Superalloy

Wu, E.; Sun, Guangai; Chen, Bin; Zhang, Jian; Ji, Vincent; Klosek, Vincent; Mathon, Marie‐Hélène

doi:10.1007/s11661-013-1887-4

Cited by 12 publications

(5 citation statements)

References 35 publications

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“…These drawbacks do not exist for experiments at constant temperature and/or longer dwell times, such as creep and stress relaxation in similar alloys [17,18]. Finally, studies requiring access to high temperature furnaces are complex as a number of experimental issues need to be overcome; this includes oxidation & corrosion effects, suitable sample monitoring including specialised thermocouples & strain gauges as well as thermal scattering associated signal attenuation effects.…”

mentioning

confidence: 99%

Relating micro-segregation to site specific high temperature deformation in single crystal nickel-base superalloy castings

D’Souza

Roebuck

Collins

et al. 2020

Materials Science and Engineering: A

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mentioning

confidence: 99%

Relating micro-segregation to site specific high temperature deformation in single crystal nickel-base superalloy castings

D’Souza

Roebuck

Collins

et al. 2020

Materials Science and Engineering: A

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“…Therefore, the measurement of residual stress is of great significance in engineering. Wu and Sun et al conducted many studies of the DD10 single crystal superalloy using neutron diffraction measurement [21,22]. Their investigation found that the evolution of the microstructure and the residual stress in DD10 superalloy showed correlation for different creep stages.…”

Section: Application Research Examples Using Residual Stress Neutron mentioning

confidence: 99%

“…Therefore, the diffraction peak position of the quenching sample will contain residual stress shifts to some extent, compared with the initial stress-free sample. reflection which was suitable to measure the long-range internal stress in materials, and thus was chosen as the diffraction crystal plane [21]. The neutron wavelength was 1.593 Å, and thus the diffraction angle was ~90° to define a cubic gauge volume of 2 × 2 × 2 mm 3 .…”

Section: Quantum Beam Sci 2018 2 X For Peer Review 10 Of 18mentioning

confidence: 99%

Recent Progress of Residual Stress Distribution and Structural Evolution in Materials and Components by Neutron Diffraction Measurement at RSND

Sun

et al. 2018

QuBS

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Neutron diffraction is an effective and nondestructive method to investigate inner structure and stress distribution inside bulk materials and components. Compared with X-ray diffraction, neutron diffraction allows a relatively high penetration depth and covers a larger gauge volume, enabling it to measure the lattice structure and three-dimensional (3D) distribution of residual stress deep inside thick sample materials. This paper presents the recent development of a Residual Stress Neutron Diffractometer (RSND) at the

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“…In the last 20 years, works have been conducted to investigate the strain/stress state in SC nickel-based superalloys. The strain/stress state of Ni-based SC superalloy samples that went through thermo-mechanical fatigue, creep-deformation, and shot-peening have been experimentally studied [15][16][17]. B. Marty.…”

Section: Introductionmentioning

confidence: 99%

“…In the previous works dealing with Ni-based SC superalloys strain/stress research, the macro-stress was always involved, and its correlations with the material performance were discussed [15][16][17]20]. However, the Ni-based SC superalloys were composed of an fcc γ-matrix and coherently aligned L1 2 -ordered γ -precipitates and had a unique two-phases mismatch structure [21,22], which has not been taken into consideration in the aforementioned works.…”

Section: Introductionmentioning

confidence: 99%

Investigations into the Surface Strain/Stress State in a Single-Crystal Superalloy via XRD Characterization

Duan

Pei

et al. 2018

Metals

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Abstract:The present study was aimed at determining the surface strain/stress state in an Ni-based single-crystal (SC) superalloy that was subjected to two different cooling rates from solid solution temperature through using the X-ray diffraction (XRD) method. The normal stresses σ s 11 and σ s 22were determined, then the Von Mises stresses (σ s V M ) were derived from them. Field emission gun scanning electron microscope (FEG-SEM) and transmission electron microscope (TEM) micrographs were taken to illustrate the strain/stress state change. The precipitation of the secondary γ phases in the γ phase and the formation of the dislocation in the interphase upon a slower cooling rate caused the γ phase lattice distortion to increase, so a larger σ s V M of the γ phase was realized in comparison to the faster cooling sample. For both of the two cooling modes, we found that the σ s V M of the γ phase increased due to the growth of the γ phase during the aging process. Also, the aging process led to pronouncedly anisotropic lattice mismatches in the {331} and {004} planes. In addition, the surface strain/stress states of a cylinder sample and a tetragonal sample were also studied using a faster cooling rate, and σ s 11 and σ s 22 were analyzed to explain the influence of the shape factor on the stress anisotropy in the [001] and 110 orientations. The strain in the [001] orientation of the γ phase is more sensitive to the shape change.

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Neutron Diffraction Study of Strain/Stress States and Subgrain Defects in a Creep-Deformed, Single-Crystal Superalloy

Cited by 12 publications

References 35 publications

Relating micro-segregation to site specific high temperature deformation in single crystal nickel-base superalloy castings

Relating micro-segregation to site specific high temperature deformation in single crystal nickel-base superalloy castings

Recent Progress of Residual Stress Distribution and Structural Evolution in Materials and Components by Neutron Diffraction Measurement at RSND

Investigations into the Surface Strain/Stress State in a Single-Crystal Superalloy via XRD Characterization

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