In-Situ saxs/waxd analysis on structural evolution in peek irradiated by 1 MeV electrons during tensile deformation

In this study, Fe-25Mn-xAl-8Ni-C alloys (x = 10 wt.%, 11 wt.%, 12 wt.%, 13 wt.%) were prepared by a vacuum arc melting method, and the microstructure of this series of alloys and the in situ tensile deformation behavior were studied. The results showed that Fe-25Mn-xAl-8Ni-C alloys mainly contained austenite phase with a small amount of NiAl compound. With the content of Al increasing, the amount of austenite decreased while the amount of NiAl compound increased. When the Al content increased to 12 wt.%, the interface between austenite and NiAl compound and austenitic internal started to precipitate k-carbide phase. In situ tensile results also showed that as the content of Al increased, the alloy elongation decreased gradually, and the tensile strength first increased and then decreased. When the Al content was up to 11 wt.%, the elongation and tensile strength were 2.6% and 702.5 MPa, respectively; the results of in situ tensile dynamic observations show that during the process of stretching, austenite deformed first, and crack initiation mainly occurred at the interface between austenite and NiAl compound, and propagated along the interface, resulting in fracture of the alloy.

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In-situ tensile deformation of Zircaloy-4 sheets with different hydrogen contents at RT and 300 °C

Materials Science and Engineering A ◽

10.1016/j.msea.2021.141093 ◽

2021 ◽

Vol 811 ◽

pp. 141093

Author(s):

Yin Zhang ◽

Xiping Song

Keyword(s):

Tensile Deformation

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In situ synchrotron small- and wide-angle X-ray study on the structural evolution of Kevlar fiber under uniaxial stretching

RSC Advances ◽

10.1039/c6ra17671b ◽

2016 ◽

Vol 6 (85) ◽

pp. 81552-81558 ◽

Cited By ~ 7

Author(s):

Xiaoyun Li ◽

Feng Tian ◽

Ping Zhou ◽

Chunming Yang ◽

Xiuhong Li ◽

...

Keyword(s):

Structural Evolution ◽

Wide Angle ◽

Uniaxial Stretching ◽

X Ray ◽

Kevlar Fiber

In situ SAXS and WAXS study on the structural evolution and mechanism of two different Kevlar fibers during stretching.

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Structural evolution of NASICON-type Li1+xAlxGe2−x(PO4)3 using in situ synchrotron X-ray powder diffraction

Journal of Materials Chemistry A ◽

10.1039/c6ta00402d ◽

2016 ◽

Vol 4 (20) ◽

pp. 7718-7726 ◽

Cited By ~ 39

Author(s):

Dorsasadat Safanama ◽

Neeraj Sharma ◽

Rayavarapu Prasada Rao ◽

Helen E. A. Brand ◽

Stefan Adams

Keyword(s):

Solid Electrolyte ◽

Diffraction Study ◽

Powder Diffraction ◽

Structural Evolution ◽

X Ray Diffraction ◽

X Ray ◽

Nasicon Type ◽

Precursor Glass

In situ synchrotron X-ray diffraction study of the synthesis of solid-electrolyte Li1+xAlxGe2−x(PO4)3 (LAGP) from the precursor glass reveals that an initially crystallized dopant poor phase transforms into the Al-doped LAGP at 800 °C.

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In-situ EBSD study of the degradation behavior in a type 316 Austenitic Stainless Steel during plastic deformation

The Journal of Strain Analysis for Engineering Design ◽

10.1177/0309324720984930 ◽

2021 ◽

pp. 030932472098493

Author(s):

Xiao Wang ◽

Yuetao Zhang ◽

Huaying Li ◽

Ming-yu Huang

Keyword(s):

Plastic Deformation ◽

Stainless Steel ◽

Austenitic Stainless Steel ◽

Tensile Deformation ◽

Target Surface ◽

Local Orientation ◽

Deformation Degree ◽

Band Contrast

Type 316 steels have been heavily utilized as the structural material in many construction equipment and infrastructures. This paper reports the characterization of degradation in 316 austenitic stainless steel during the plastic deformation. The in-situ EBSD results revealed that, with the increase of plastic strain, the band contrast (BC) value progressively decreased in both grain and grain boundaries, and the target surface becomes uneven after the plastic tensile, which indicates that the increase of surface roughness. Meanwhile, the KAM and ρGND values are low in the origin specimen but increased significantly after the in-situ tensile. The results indicated that the KAM and ρGND are closely related to the deformation degree of the materials, which can be used as the indicator for assessing the degradation of 316 steel. Besides, the re-orientation of grain occurred after the tensile deformation, which can be recognized from the lattice orientation and local orientation maps.

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In-situ X-ray tomographic imaging study of gas and structural evolution in a commercial Li-ion pouch cell

Journal of Power Sources ◽

10.1016/j.jpowsour.2021.230818 ◽

2022 ◽

Vol 520 ◽

pp. 230818

Author(s):

Wenjia Du ◽

Rhodri E. Owen ◽

Anmol Jnawali ◽

Tobias P. Neville ◽

Francesco Iacoviello ◽

...

Keyword(s):

Structural Evolution ◽

Imaging Study ◽

Tomographic Imaging ◽

X Ray ◽

Li Ion

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Experimental study on tensile deformation process of graphitized high carbon steel sheet

Physics and Chemistry of Materials Treatment ◽

10.30791/0015-3214-2021-4-74-80 ◽

2021 ◽

Vol 4 ◽

pp. 74-80

Author(s):

Zhang Yong Jun ◽

◽

Li Xin Peng ◽

Wang Jiu Hua ◽

Han Jing Tao ◽

...

Keyword(s):

Plastic Deformation ◽

Carbon Steel ◽

Steel Sheet ◽

Tensile Deformation ◽

High Carbon Steel ◽

Ferrite Matrix ◽

High Carbon ◽

Graphite Inclusion ◽

Carbon Steel Sheet

As the object for the study, graphitized high-carbon steel sheet with a carbon content of 0.66 % was used, the tensile test of this sheet using a universal testing (breaking) machine was performed; as well as in-situ observation of the microstructure in the process of tensile deformation of this sheet using in-situ technology of scanning electron microscopy (SEM) was made. The test results show that the main mechanical properties in different directions of tested graphitized high-carbon steel sheet are relatively the same, that is, for a tensile sample of different directions, the ratio of the yield strength σ0,2 to the tensile strength σв is approximately 0.73; the strain hardening index n is approximately 0.24; the plastic deformation coefficient r is approximately 0.83. This indicates that this sheet did not exhibit significant anisotropy. In the process of tensile, deformation of the specimen is mainly developed from local plastic deformation of the graphite inclusions to the total deformation in the deformation zone of the sample; with the increase of displacement, micro-gap between the graphite inclusion and ferrite grain along the direction of the axis of tensile gradually formed and propagated along the direction perpendicular to the axis of tensile; number of slip lines in the ferrite matrix gradually increased, and the distance between them gradually decreases; when the sample breaks, in the fracture large dimple with the core of graphite inclusion and small dimples in the ferrite appears. And the ferrite matrix near the fracture is covered with slip lines, this shows that the ferritic matrix underwent severe plastic deformation before breaking.

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Imaging the Polymorphic Transformation in a Single Cu6Sn5 Grain in a Solder Joint

Materials ◽

10.3390/ma11112229 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2229 ◽

Cited By ~ 3

Author(s):

Flora Somidin ◽

Hiroshi Maeno ◽

Xuan Tran ◽

Stuart D. McDonald ◽

Mohd Mohd Salleh ◽

...

Keyword(s):

Solder Joint ◽

Polymorphic Transformation ◽

Structural Evolution ◽

Real Space ◽

Transformation Behavior ◽

New Approach ◽

Transmission Electron ◽

Contrast Pattern ◽

In Situ Observations

In-situ observations of the polymorphic transformation in a single targeted Cu6Sn5 grain constrained between Sn-0.7 wt % Cu solder and Cu-Cu3Sn phases and the associated structural evolution during a solid-state thermal cycle were achieved via a high-voltage transmission electron microscope (HV-TEM) technique. Here, we show that the monoclinic η′-Cu6Sn5 superlattice reflections appear in the hexagonal η-Cu6Sn5 diffraction pattern upon cooling to isothermal 140 °C from 210 °C. The in-situ real space imaging shows that the η′-Cu6Sn5 contrast pattern is initiated at the grain boundary. This method demonstrates a new approach for further understanding the polymorphic transformation behavior on a real solder joint.

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Porous Silicon Structural Evolution from In-Situ Luminescence and Raman Measurements

MRS Proceedings ◽

10.1557/proc-431-171 ◽

1996 ◽

Vol 431 ◽

Author(s):

D. R. Tallant ◽

M. J. Kelly ◽

T. R. Guilinger ◽

R. L. Simpson

Keyword(s):

Porous Silicon ◽

Silicon Surface ◽

Structural Evolution ◽

Surface Oxidation ◽

Ethanol Solution ◽

Nonradiative Recombination ◽

Photoluminescence Intensity ◽

Exciton Migration ◽

Photoluminescence Mechanism

AbstractWe performed in-situ photoluminescence and Raman measurements on an anodized silicon surface in the HF/ethanol solution used for anodization. The porous silicon thereby produced, while resident in HF/ethanol, does not immediately exhibit intense photoluminescence. Intense photoluminescence develops spontaneously in HF/ethanol after 18–24 hours or with replacement of the HF/ethanol with water. These results support a quantum confinement mechanism in which exciton migration to traps and nonradiative recombination dominates the de-excitation pathways until silicon nanocrystals are physically separated and energetically decoupled by hydrofluoric acid etching or surface oxidation. The porous silicon surface, as produced by anodization, shows large differences in photoluminescence intensity and peak wavelength over millimeter distances. Parallel Raman measurements implicate nanometer-size silicon particles in the photoluminescence mechanism.

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