Photostimulated exoelectron emission from slip lines: A new microscopy of metal deformation

Baxter, William J.; Rouze, S. R.

doi:10.1063/1.1661972

Cited by 32 publications

(7 citation statements)

References 4 publications

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“…[34][35][36] Deformation in aluminum alloys is largely confined to slip on well-defined planes. [1][2][3][4][5][6][7][8][9] Prior to strain localization, at a constant crosshead speed, the sample area is expected to increase linearly as fresh metal surface is produced (almost) uniformly along the gauge section.…”

Section: Discussionmentioning

confidence: 99%

“…The photoelectron intensities increase considerably during plastic deformation due to the production of new metal surface area where slip lines and bands intersect the surface. 34,35 The distribution of the crystal structures for these newly formed surfaces will in general differ from the distribution of crystal structures prior to deformation, especially in the presence of grain rotation. Thus we expect that deformation will also alter the photoelectron-energy distributions as deformation proceeds.…”

Section: Introductionmentioning

confidence: 98%

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Deformation of cube-textured aluminum studied using laser-induced photoelectron emission

et al. 2007

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The evolution of the kinetic energy distribution of photoelectrons from a cube-oriented aluminum sample during tensile deformation was probed with a retarding field energy analyzer. Because of the anisotropy of the aluminum work function, the electron-energy distribution is altered as the area fractions of the major surface planes change during deformation. In cube-textured aluminum, deformation reduces the {100} area fraction and the relatively low energy electrons from these surfaces. Conversely, the {110} and {111} area fractions and the relatively high energy electrons from these surfaces both increase. These changes are quantitatively consistent with texture analysis by electron backscattered diffraction (EBSD). They reflect deformation-induced production of {111} surfaces by slip and the exposure of {110} surfaces by grain rotation. Photoelectron kinetic energy measurements supplement EBSD measurements and are readily acquired in real-time.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Deformation of cube-textured aluminum studied using laser-induced photoelectron emission

et al. 2007

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“…17,18,[28][29][30][31][32][33][34][35][36][37][38][39][40] Electron microscopy, autoradiographic stripping, 29 and photoemission spectroscopy 17,37 showed that these signals were closely associated with the formation of slip lines and bands on deformed surfaces. 17,18,[28][29][30][31][32][33][34][35][36][37][38][39][40] Electron microscopy, autoradiographic stripping, 29 and photoemission spectroscopy 17,37 showed that these signals were closely associated with the formation of slip lines and bands on deformed surfaces.…”

Section: Discussionmentioning

confidence: 99%

“…It is important to stress that the increase in the PSE signal during deformation is proportional to the area of fresh metal surface exposed as slip lines and bands intersect the surface, 17 with possibly minor effects due to grain rotation. The tendency of the native oxide on aluminum to hinder PSE allows for sensitive measurements of the formation of new surface area.…”

Section: Introductionmentioning

confidence: 99%

Determination of strain localization in aluminum alloys using laser-induced photoelectron emission

Cai

Langford

Levine

et al. 2004

Journal of Applied Physics

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Articles you may be interested inThe effect of thermal oxidation on laser-induced photoelectron emission during tensile deformation of polycrystalline aluminum J. Appl. Phys. 107, 053526 (2010); 10.1063/1.3327237Laser-induced spallation of aluminum and Al alloys at strain rates above 2 × 10 6 s − 1 Uniaxial tensile deformation of oxidized aluminum produces low work-function patches of fresh metal which can be probed by measurements of photoelectron emission during exposure to ultraviolet light. We report measurements of photoelectron emission during uniaxial testing of polycrystalline Al(1200), Al-Mn(3003), Al-Mg(5052), and Al-Mg-Si(6061) alloys where the broad face of the gauge section is exposed to pulsed excimer laser radiation ͑248 nm͒. We show that strain localization alters the distribution of fresh surface metal produced by subsequent deformation. The transition from more homogenous deformation to the principally localized deformation associated with shear bands is associated with a discontinuity in the growth rate of photoelectron intensities versus time. At this transition, the rate of fresh metal production along the illuminated portion of gauge section decreases. In all four materials, the strain at the discontinuity is somewhat below the strain given by the Considère criterion, consistent with the role of microstructural effects in strain localization. We suggest that these photoelectron measurements constrain quantitative models of strain localization.

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“…The significance of TSEE and optically stimulated exoelectron emission (OSEE) to dosimetric applications has been pointed out by Becker [ 1,2]. The emission phenomena are also utilized currently as a research tool in solid state physics in order t,o detect structural defects in metals [3,4]. By means of the TSEE dosimetry using CaSO,, a linear response has been obtained down to 3x 10-"Rad or less [5].…”

Section: Introductionmentioning

confidence: 99%

ESR study on thermally stimulated exoelectron emission from irradiated K2SO4

Sasaki

1976

Phys. Stat. Sol. (a)

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Thermally stimulated exoelectron emission (TSEE) and ESR measurements were performed on irradiated K2SO4 powder. Five TSEE peaks which are associated with thermal decay of paramagnetic species were observed in the range from −165 to 550 °C. The −45 and 265 °C peaks correspond to the thermal decay of only electron‐type centres and the 5, 152, and 210 °C peaks correspond to the thermal decay of both electron‐type and hole‐type centres. Dose dependences of these peak intensities show that they become maximum around 5 × 105 Rad and decrease with further irradiations, while the yields of the paramagnetic species continue to increase. The observations could be attributed to structural defects of the crystal lattice in the surface layer.

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Photostimulated exoelectron emission from slip lines: A new microscopy of metal deformation

Cited by 32 publications

References 4 publications

Deformation of cube-textured aluminum studied using laser-induced photoelectron emission

Deformation of cube-textured aluminum studied using laser-induced photoelectron emission

Determination of strain localization in aluminum alloys using laser-induced photoelectron emission

ESR study on thermally stimulated exoelectron emission from irradiated K2SO4

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