SEM observations of dislocation substructures around fatigue cracks in aisi type 304 stainless steel

Vries, M.I. de; Mastenbroek, A.

doi:10.1007/bf02642867

Cited by 11 publications

(4 citation statements)

References 4 publications

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“…One sequence of operations ofthis type is usually sufficient to identify all the subgrains in a given area. The cell sizes deduced in this technique agree well with those found by more conventional TEM techniques (De Vries and Mastenbrock 1977;Schmidt et al 1978) although they are obtained much more quickly and from a wider area of the specimen than is possible in the TEM case. The minimum misorientation between cells can be estimated by noting the minimum change in angle of incidence that is needed to make any individual cell visible.…”

Section: R94supporting

confidence: 63%

Electron channeling patterns in the scanning electron microscope

Joy¹,

Newbury

Davidson

1982

Journal of Applied Physics

328

132

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A novel apparatus for in situ compression of submicron structures and particles in a high resolution SEM Rev. Sci. Instrum. 83, 095105 (2012) Foucault imaging by using non-dedicated transmission electron microscope Appl. Phys. Lett. 101, 093101 (2012) New Products Rev. Sci. Instrum. 83, 079501 (2012) Towards secondary ion mass spectrometry on the helium ion microscope: An experimental and simulation based feasibility study with He+ and Ne+ bombardment This article provides a comprehensive review of the theory, practice, and application of electron channeling patterns in the scanning electron microscope. An atlas of indexed channeling maps for the bcc, fcc, diamond cubic, and hcp systems is included with a bibliography of 240 references containing all known published work on electron channeling for crystallographic studies in the SEM.

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Section: R94supporting

confidence: 63%

Electron channeling patterns in the scanning electron microscope

Joy¹,

Newbury

Davidson

1982

Journal of Applied Physics

328

132

View full text Add to dashboard Cite

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“…The presence of the subsurface zone (SZ), physical properties of which differ from those in the interior of a material [1] may influence the performance of the surface in service. For inspection of such alternations profilometry, microscopy, hardness testing, SEM, TEM [2] X-ray diffraction can be used [3,4]. Positron annihilation spectroscopy is seldom used for this purpose; however; it is a widely used technique for detecting of the defects at the atomic scale [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Positron Annihilation Study of Defects Induced by Various Cutting Methods in Stainless Steel Grade 304

2011

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We report in this article the comparison of the subsurface zones (SZs) in austenitic stainless steel 304 samples created by three cutting techniques, i.e., the laser cutting (LC), abrasive water jet (AWJ), and traditional milling cutting (MC). The crystal lattice defects distribution in this zone were investigated using the positron annihilation method. It was shown that the MC creates the great number mainly edge dislocations decorated by vacancies. Their concentration decreases with the increase of the depth from the cut surface. The total depth of the SZ is extended up to 150 lm from the cut surface. Similar dependency was observed for the AWJ machining but the total depth is much lower, i.e., 40 lm. The laser cut machining generates the zone with the lowest concentration of defects which does not vary with the depth. However, LC affects the sample up to the depth of about 500 lm. The degree of the surface roughness is similar for laser cut and AWJ, but for the MC it is five times smaller.

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“…The most studied materials exposed to sandblasting are dental alloys [ 1 ], stainless steels [ 3 ], titanium [ 4 ], and titanium alloys [ 5 ]. Scanning electron microscopy (SEM), atomic force microcopy (AFM), X-ray diffraction (XRD), or microhardness measurements are commonly used to investigate the morphology of sandblasted surfaces or properties of the nanocrystallized subsurface regions [ 6 , 7 ]. Studies revealed that sandblasted surfaces are sensitive to the stream pressure, size, and chemical composition of the applied particles.…”

Section: Introductionmentioning

confidence: 99%

Positron Annihilation and Complementary Studies of Copper Sandblasted with Alumina Particles at Different Pressures

et al. 2017

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Positron annihilation spectroscopy and complementary methods were used to detect changes induced by sandblasting of alumina particles at different pressures varying from 1 to 6 bar in pure well-annealed copper. The positron lifetime measurements revealed existence of dislocations and vacancy clusters in the adjoined surface layer. The presence of retained alumina particles in the copper at the depth below 50 µm was found in the SEM pictures and also in the annihilation line shape parameter profiles measured in the etching experiment. The profiles show us that the total depth of damaged zones induced by sandblasting of alumina particles ranges from 140 µm up to ca. 800 µm and it depends on the applied pressure. The work-hardening of the adjoined surface layer was found in the microhardness measurements at the cross-section of the sandblasted samples.

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SEM observations of dislocation substructures around fatigue cracks in aisi type 304 stainless steel

Cited by 11 publications

References 4 publications

Electron channeling patterns in the scanning electron microscope

Electron channeling patterns in the scanning electron microscope

Positron Annihilation Study of Defects Induced by Various Cutting Methods in Stainless Steel Grade 304

Positron Annihilation and Complementary Studies of Copper Sandblasted with Alumina Particles at Different Pressures

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