grain control using spot cooling in multi-crystalline

Aluminum and Aluminum Alloys Casting Problems

Grain Refinement. All aluminum alloys can be made to solidify with a fully equiaxed, fine grain structure through the use of suitable grain-refining additions. The most widely used grain refiners are master alloys of titanium, or of titanium and boron, in aluminumTi.

Study of DP590 Microstructure Welded with Resistance

2021/3/30In automotive industries, employing advanced high-strength steels such as dual-phase steels by taking advantage of high dynamic force absorption during car accidents and lightweight is one of the major challenges. In this regard, the effect of resistance spot welding parameters on the above great properties of advanced high-strength DP590 steel has been studied. In this study, the effect of

Hydrogen

Chemical vapor deposition has been highlighted as a promising tool for facile graphene growth in a large area. However, grain boundaries impose detrimental effects on the mechanical strength or electrical mobility of graphene. Here, we demonstrate that high-pressure hydrogen treatment in the preannealing step plays a key role in fast and large grain growth and leads to the successful synthesis

Design of multi

So far, multi-beam applications are limited to small spot-arrays and scanning fields. For larger spot-arrays and/or scanning fields, the inherent distortion of state-of-the-art 2D-laser scanners and focusing lenses deforms the spot-array, heavily limiting the positioning accuracy of the process.

Color of Copper/Copper Oxide

Precise control of both laser intensity and duration was required to balance photothermal heating and conductive cooling. The samples were irradiated with a focal spot of 2 m in diameter ( e −2 ) at varying irradiance of 5 to 3500 kJ mm −2, by modulating the pulse number N ( Figure 4a ).

Amazon: Honeywell 176 CFM Swamp Remote Control

Ideal for spot cooling small areas such as bed, desk area, sofa, dining table Super low power consumption (only 32W at highest speed) with Patented Brushless motor technology that offers 5 speeds with Low Energy-Quiet Mode that minimizes energy consumption sound level in lowest speed setting - Ideal for long hours of quiet comfort at night.

cmse.postech.ac.kr

Atomistic Simulation of Grain Boundary Mobility (from POSCO) Thermodynamic Modeling and Design of Fe-based Amorphous/Quasi-Crystalline Materials (from POSCO) Deformation mechanism and mechanical behavior of nano crystalline/amorphous matrix composite: molecular dynamics simulation study (from KIST)

Dislocation

Dislocation-driven recrystallization in AZ31B magnesium alloy imaged by quasi-in situ EBSD in annealing experiments Marco A. Lopez-Sancheza,⁎, A. Tommasia, F. Baroua, R. Queyb a Gosciences Montpellier, Universit de Montpellier CNRS, Place E. Bataillon, Montpellier, 34095 cedex 5, France

Modeling the copper microstructure and elastic

2017/3/28As a result of the thermal stress, i.e., cooling from the stress free temperature 400 C to the testing temperature 100 C, a significant difference in normal stresses (Fig. 5) were observed for the crystalline test structure without Cu grains by using isotropic elastic5

Amazon: Honeywell 176 CFM Swamp Remote Control

Ideal for spot cooling small areas such as bed, desk area, sofa, dining table Super low power consumption (only 32W at highest speed) with Patented Brushless motor technology that offers 5 speeds with Low Energy-Quiet Mode that minimizes energy consumption sound level in lowest speed setting - Ideal for long hours of quiet comfort at night.

Modeling the copper microstructure and elastic

2017/3/28As a result of the thermal stress, i.e., cooling from the stress free temperature 400 C to the testing temperature 100 C, a significant difference in normal stresses (Fig. 5) were observed for the crystalline test structure without Cu grains by using isotropic elastic5

Grain control using spot cooling in multi

We report a novel idea for grain control by using spot cooling for multi-crystalline silicon (mc-Si) crystal growth. The method employs a graphite crucible with cooling spots to generate radial thermal gradients of the silicon melt for nucleation during directional solidification. The effect of cooling spots on the grown ingot was studied by minority charge carrier lifetime mapping and

A Study of the Role of Grain boundary Engineering in

Grain boundary engineering is a new concept in m aterials s cience and e ngineering, first proposed by Prof. T. Watanabe in the early 1980s. It is an approach designed to control the properties of materials by controlling the grain boundary character distribution

Suggested Electric Fan Wiring Diagrams

2016/8/28Suggested Primary Cooling Fan - Single Speed (ON/OFF) Using Ground Switching Devices Only for Primary Activation. A Ground Switched Device is one that provides a grounded output upon activation instead of a voltage output. Updated: 08/28/16 87 87b 86 85

4D STEM

A generalized multi-value detector is the pixelated STEM detector (e.g., cameras). Availability of high-speed, high-sensitivity, and high-dynamic-range detectors (including direct electron detectors ) along with advances and availability of computational power, enable large-scale 4D experiments in the recent years.

Imaging of Transient Structures Using Nanosecond in

Longer multi-microsecond time delays used in this study cannot be achieved in a single laser–plus–beam splitter system without using optical paths of thousands of meters. By accumulating single-shot pump-probe observations with varying time delays, one can develop an understanding of each stage in the evolution of a material process.

Grain control using spot cooling in multi

2009/1/1We report a novel idea for grain control by using spot cooling for multi-crystalline silicon (mc-Si) crystal growth. The method employs a graphite crucible with cooling spots to generate radial thermal gradients of the silicon melt for nucleation during directional

High‐quality multi‐crystalline silicon growth for solar cells

We report simple ideas for grain control by using active cooling and crucible insulation for high‐quality multi‐crystalline silicon (mc‐Si) growth for solar cells. The method employed an active cooling spot to induce initial dendrite growth, and the solidification front was controlled to be slightly convex through crucible insulation.

Genes and QTLs for Rice Grain Quality Improvement

2012/8/1Grain length, grain width, length-to-width (grain shape) are the most stable properties of the variety, so they are highly heritable. Genetically, a lot of QTLs have been identified for grain length, grain width, and grain shape (Figure 2a). The chromosome 3 harbors.

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

Grain growth occurs according to the maximum temperature of HAZ, and M23C6 is formed on the grain boundary in the subsequent continuous cooling process. It was clarified that M23C6 became only initiation site of fracture under Charpy impact loading, and its existence density was the main factor of

Twinning occurrence and grain competition in multi

2013/2/1Multi-crystalline silicon solidification is investigated by performing directional solidification experiments. Twinning phenomenon has been identified and observed in situ and in real time during the solidification using X-ray synchrotron imaging techniques: radiography

Contactless temperature measurement in wire

2021/3/4The associated cooling profile was also derived (Fig. 11b), estimating rapid cooling rates (up to 1000 C/s) in the area just beyond the heat source. Fig. 11 a Temperature distribution in electron beam additive manufacturing as recorded using a near-infrared camera with an emissivity ε T of 0.3.

4D STEM

A generalized multi-value detector is the pixelated STEM detector (e.g., cameras). Availability of high-speed, high-sensitivity, and high-dynamic-range detectors (including direct electron detectors ) along with advances and availability of computational power, enable large-scale 4D experiments in the recent years.

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