Non-acid electrolyte thins many materials for TEM without causing hydride formation

Kestel, B.J.

doi:10.1016/0304-3991(86)90208-1

Cited by 60 publications

(22 citation statements)

References 2 publications

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“…[17][18][19][20][21][22][23] The HPT of commercially pure titanium at slow speed of 0.2 rpm and high strain of 10 turns resulted in a-phase at 1.5 GPa (diamond in Figure 1) and v-phase with small amount of a-phase at 5 GPa (triangle in Figure 1). [29,30] The HPT (0.5-10 turns, 0.2 and 0.5 rpm, 20°C…”

Section: Resultsmentioning

confidence: 99%

Phase Transformations in Ti–Fe Alloys Induced by High‐Pressure Torsion

et al. 2015

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The Ti-Fe alloys are quite important among various Ti-based alloys doped with b-stabilisers. Severe plastic deformation by the high pressure torsion (HPT) leads to the strong grain refinement in Ti-Fe alloys. The high-pressure vTi-phase appears during HPT of the Ti-1 wt.% Fe alloy. However, the vTi does not appear after uniaxial compression at the same pressure, without torsion. vTi remains quenched after pressure release and disappears by heating around 140-150°C. However, the further alloying with iron suppresses the formation of vTi-phase. As a result, vTi does not appear after HPT in the Ti-10 wt.% Fe alloy.

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Section: Resultsmentioning

confidence: 99%

Phase Transformations in Ti–Fe Alloys Induced by High‐Pressure Torsion

et al. 2015

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“…The disks were then electropolished to perforation in a Fischione twin-jet polisher using a electrolyte of 500 mL/100 mL ethanol/butyl cellulosolve base electrolyte of 5.6 g magnesium perchlorate and 2.3 g lithium chloride [33,34] cooled below 223 K (-50°C), at an applied potential of 65 V. The TEM samples were analyzed at 200 keV using both a JEOL 2000FX microscope with a LaB 6 filament, and a field-emission JEOL 2010F microscope.…”

Section: E Temmentioning

confidence: 99%

Role of Solute in the Texture Modification During Hot Deformation of Mg-Rare Earth Alloys

Hadorn

Hantzsche

et al. 2011

Metall Mater Trans A

347

164

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Although conventional Mg alloys develop strong crystallographic textures during deformation that persist during annealing, the addition of rare earth (RE) elements can induce comparably weaker textures. The texture weakening effect is explored using hot-rolled Mg-Y alloys of a single phase to focus on the possibility of solute effects. Of the studied compositions, the richer alloys ( ‡0.17 at. pct) show the weakening effect, whereas the most dilute alloy (£0.03 at. pct) does not. Electron backscattered diffraction (EBSD) analysis of intragranular misorientation axes (IGMA) indicate that the geometrically necessary dislocation (GND) content in dilute, hotrolled alloys contain primarily basal hai dislocations. At higher concentrations, the dislocations are predominantly prismatic hai type. This change in the GND content suggests a change in dynamic recrystallization (DRX) mode. For example, nonbasal cross slip has been associated with continuous DRX. Furthermore, nonbasal slip might also promote more homogenous shear banding/twinning. Both of these mechanisms have been shown previously to give rise to more randomly oriented nuclei during DRX. Energy dispersive X-ray spectroscopy performed through transmission electron microscopy shows that Mg-Y exhibits significant grain boundary solute segregation, consistent with recent observations of solute clustering. Slow grain growth may be explained by solute drag. It is hypothesized that limited grain boundary mobility suppresses conventional discontinuous DRX, which has been shown to retain the deformation texture. The promotion of nonbasal slip and suppression of grain boundary mobility are proposed as solid solution-based mechanisms responsible for the observed texture weakening phenomenon in Mg rare earth alloys.

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“…Pieces of the as-rolled alloys were cut and ground to a thickness below 200 lm so that they could be punched into 3-mm discs. They were then electropolished to perforation in a Fischione twin-jet polisher using a 500 mL/100 mL ethanol/butyl cellulosolve base electrolyte of 5.6 g magnesium perchlorate and 2.3 g lithium chloride [12,13] cooled below -50°C, at an applied potential of 65 V, although the current density was only~2 mA/mm 2 .…”

Section: Tem and Particle Sizementioning

confidence: 99%