"sub micron grains"

Kinetics of Sub-Micron Grain Size Refinement in 9310 Steel ...

Kinetics of Sub-Micron Grain Size Refinement in 9310 Steel THOMAS KOZMEL, EDWARD Y. CHEN, CHARLIE C. CHEN, and SAMMY TIN Recent efforts have focused on the development of novel manufacturing processes capable of producing microstructures dominated by sub-micron grains.

Grain orientation and strain measurements in sub-micron ...

2001-3-1 · @article{osti_789111, title = {Grain orientation and strain measurements in sub-micron wide passivated individual aluminum test structures}, author = {Tamura, N and Valek, B C and Spolenak, R and MacDowell, A A and Celestre, R S and Padmore, H A and Brown, W L and Marieb, T and Bravman, J C and Batterman, B W and Patel, J R}, abstractNote = {An X-ray microdiffraction dedicated beamline ...

The fate of sub-micron circumplanetary dust grains II ...

2012-7-23 · The fate of sub-micron circumplanetary dust grains II: Multipolar fields Daniel Jontof-Hutter⇑, Douglas P. Hamilton Astronomy Department, University of Maryland, College Park, MD 20742-2421, United States article info Article history: Received 8 November 2011 Revised 24 April 2012 Accepted 28 April 2012 Available online 18 May 2012 Keywords:

Development of nano/sub-micron grain structures in ...

The samples are analyzed by X-Ray diffraction, SQUID, transmission electron microscopy, and tensile testing to fundamentally understand the microstructural evolution, the mechanism for the martensite [implies] austenite reversion, the formation of nano/sub-micron austenite grains, and the relationship between the microstructure and the strength ...

Persistence of crystal orientations across sub-micron ...

2021-3-15 · We observe sub-micron-scale regions, where apparently disconnected Cu and W grains have near-identical crystallographic orientations. This persistence of grain orientations suggests Cu and W grains within these regions are interconnected in 3-D when they first form and may be considered as intercalated, sub-micron-scale "super-grains".

Grit, Scratches and Sub-Surface Damage – Part 1 ...

2019-10-2 · The region where the grain structure is disrupted/damaged is marked in red. The relatively large grains with underlying sub-structure are visible below the surface, but those grains are clearly distorted with sub-micron texture within about 1 micron of the scratch boundary. Cross-section of a single scratch from 600 grit silicon carbide paper.

Development of nano/sub-micron grain structures in ...

Development of nano/sub-micron grain structures in metastable austenitic stainless steels . By 1979- Shreyas Rajasekhara. Abstract. textThis dissertation is a part of a collaborative work between the University of Texas, Austin-Texas, the University of Oulu, Oulu-Finland, and Outokumpu Stainless Oy, Tornio-Finland,, to develop commercial ...

The fate of sub-micron circumplanetary dust grains I ...

2012-3-6 · The fate of sub-micron circumplanetary dust grains I: Aligned dipolar magnetic fields Daniel Jontof-Hutter⇑, Douglas P. Hamilton Astronomy Department, University of Maryland, College Park, MD 20742-2421, United States article info Article history: Received 4 April 2011 Revised 17 August 2011 Accepted 30 September 2011 Available online 17 ...

Evolution of sub-micron grain size and weak texture in ...

2012-1-1 · This is the first successful attempt to produce simultaneously ultrafine grain size and weak texture in a single-phase magnesium alloy Mg–3Al–0.4Mn through an optimal choice of processing parameters in a modified multi-axial forging (MAF) process. An average grain size of ∼0.4 μm and a weak texture could be achieved. This has led to an ...

Is there more than meets the eye? Presence and role of …

Context. The presence of sub-micron grains has been inferred in several debris discs, usually because of a blue colour of the spectrum in scattered light or a pronounced silicate band around 10 μm, even though these particles should be blown out by stellar radiation pressure on very short timescales. So far, no fully satisfying explanation has been found for this apparent paradox.
Aims ...

Dust Diffusion and Settling in the Presence of Collisions ...

In protoplanetary disks, the distribution and abundance of small (sub)micron grains are important for a range of physical and chemical processes. For example, they dominate the optical depth at short wavelengths and their surfaces are the sites of many important chemical reactions, such as the formation of water. Based on their aerodynamical properties (I.e., their strong dynamical coupling ...

DUST DIFFUSION AND SETTLING IN THE PRESENCE OF COLLI…

2001-3-1 · @article{osti_789111, title = {Grain orientation and strain measurements in sub-micron wide passivated individual aluminum test structures}, author = {Tamura, N and Valek, B C and Spolenak, R and MacDowell, A A and Celestre, R S and Padmore, H A and Brown, W L and Marieb, T and Bravman, J C and Batterman, B W and Patel, J R}, abstractNote = {An X-ray microdiffraction dedicated beamline ...

The Fate of Sub-micron Circumplanetary Dust Grains II ...

2012-6-5 · We study the radial and vertical stability of dust grains launched with all charge-to-mass ratios at arbitrary distances from rotating planets with complex magnetic fields. We show that the aligned dipole magnetic field model analyzed by Jontof-Hutter and Hamilton (2012) is an excellent approximation in most cases, but that fundamentally new physics arises with the inclusion of non ...

Detecting Sub-Micron Space Weathering Effects in Lunar ...

2021-9-13 · These results provide a direct spatial link between the physical/chemical changes in space-exposed grain surfaces and spectral changes of space weathered bodies. Utt, KL, Ogliore, RC, Bechtel, HA et al. Detecting Sub-Micron Space Weathering Effects in Lunar Grains With Synchrotron Infrared Nanospectroscopy.

Kinetics of Sub-Micron Grain Size Refinement in 9310 Steel ...

2014-2-13 · For structural applications, grain refinement has been shown to enhance mechanical properties such as strength, fatigue resistance, and fracture toughness. Through control of the thermo-mechanical processing parameters, dynamic recrystallization mechanisms were used to produce microstructures consisting of sub-micron grains in 9310 steel.

EXPLORING THE ROLE OF SUB-MICRON-SIZED DUST …

EXPLORING THE ROLE OF SUB-MICRON-SIZED DUST GRAINS IN THE ATMOSPHERES OF RED L0–L6 DWARFS Kay Hiranaka1,2,3, Kelle L. Cruz1,2,3,7, Stephanie T. Douglas3,4, Mark S. Marley5, and Vivienne F. Baldassare1,3,6 1 Hunter College, Department of Physics and Astronomy, City University of New York, 695 Park Ave, New York, NY 10065, USA; [email protected]

Micro Grits and Sub-Micron Powders

2020-1-2 · Grains and Sub-Micron Powders for Abrasive and Ceramic Use CARBOREX micro grits and sub-micron powders are high quality black and green silicon carbide grains manufactured by Washington Mills. Washington Mills has the technical skills and advanced equipment to make sub-micron powders - in

The sticking efficiency of quartz crystals for cosmic sub ...

2001-8-1 · For spherical micron-sized grains the presence of a coating, such as a few microns of Apiezon L, increases the capture velocity from 4 to 5– 7.5 m s −1. For irregular SiC grains, in the investigated velocity regime (up to 55 m s −1 ) the crystals show a high sticking efficiency, even without the presence of the Apiezon L layer.

High-performance hot-warm rolled Zn-0.8Li alloy with …

2019-11-1 · The sub-micron grains are characterized through the T-EBSD analysis, which have an average size of 530 nm and form a recrystallized grain band. (3) The high-density metastable α-Li 2 Zn 3 precipitates are revealed through combined analysis of 3D-AP and HRTEM, which are ellipsoid-shaped with an average size of 4.4 nm.

[1603.02630] Dust diffusion and settling in the presence ...

2016-3-9 · Abstract: In protoplanetary disks, the distribution and abundance of small (sub)micron grains are important for a range of physical and chemical processes. For example, they dominate the optical depth at short wavelengths and their surfaces are the sites of many important chemical reactions such as the formation of water.

Silicon carbide granulated powder-

The SiC granulated powder produced of our company takes high purity sub-micron grade silicon carbide powder as raw material. The pressureless sintered silicon carbide ceramics made of the granulated powders above possess many advantages ch as,high strength,high hardness,wear resistance,good acid and alkali corrosion resistance,excellent heat ...

INFRARED SPECTROSCOPY OF INDIVIDUAL SUB …

2019-1-10 · INFRARED SPECTROSCOPY OF INDIVIDUAL SUB-MICRON PRESOLAR AND EARLY SOLAR SYSTEM DUST GRAINS IN THE ELECTRON MICROSCOPE. R. …

Is there more than meets the eye? Presence and role of …

 · Context. The presence of sub-micron grains has been inferred in several debris discs, usually because of a blue colour of the spectrum in scattered light or a pronounced silicate band around 10 μm, even though these particles should be blown out by stellar radiation pressure on very short timescales. So far, no fully satisfying explanation has been found for this apparent paradox.
Aims ...

The potential of consolidated nano/sub-micron AZ31 ...

2007-4-24 · Consolidated nano/sub-micron AZ31 Mg alloy is a new structural material that combines nano-scale grains with a size of up to 100 nm and sub-micron grains with a size of up to 300 nm. Inherently, this new material should have significantly improved strength, making it a potential candidate for special applications requiring increased specific strength.The present paper evaluates the …

Laboratory Measurements of Optical and Physical …

2006-1-1 · The lunar surface is covered with a thick layer of sub-micron/micron size dust grains formed by meteoritic impact over billions of years. The fine dust grains are levitated and transported on the lunar surface, and transient dust clouds over the lunar horizon were observed by experiments during the Apollo 17 mission. Theoretical models suggest that the dust grains on the lunar surface are ...

(PDF) Kinetics of Sub-Micron Grain Size Refinement in …

sub-micron grains in 9310 steel. Starting with initial bainitic grain sizes of 40 to 50 lm, various. levels of grain refinement were observed following hot deformation of 9310 steel samples at ...

Detecting Sub‐Micron Space Weathering Effects in Lunar ...

2021-8-12 · Detecting Sub-Micron Space Weathering Effects in Lunar Grains With Synchrotron Infrared Nanospectroscopy ... spectroscopic techniques provide an opportunity to understand better the optical effects of space weathering on the sub-micrometer length scale. ... These results provide a direct spatial link between the physical/chemical changes in ...

Sub Micron Calcium Carbonate Archives

2021-8-14 · sub-micron calcium carbonate powder Calcite is calcium carbonate (CaCO3) in its purest form. Calcite grains is the result of granulating occurring …

The fate of sub-micron circumplanetary dust grains I ...

2011-4-5 · The fate of sub-micron circumplanetary dust grains I: Aligned Dipolar Magnetic Fields Daniel Jontof-Hutter1 Douglas P. Hamilton1 Astronomy Department, University of Maryland, College Park, MD 20742-2421 ABSTRACT We study the stability of charged dust grains orbiting a planet and subject to gravity and the electromagnetic force.