scholarly journals Investigation of shell mold casting technique in Ghana using indigenous materials

2021 ◽  
pp. e01052
Author(s):  
J.K. Hatsu ◽  
A.K. Sunnu ◽  
G.K. Ayetor ◽  
G. Takyi
Keyword(s):  
Shell Mold ◽  
Casting Technique ◽  
Mold Casting ◽  
Indigenous Materials

Fabrication of Al–Si Gasar by mold casting technique

2018 ◽  
Vol 109 (4) ◽  
pp. 332-340
Author(s):  
Olga Komissarchuk ◽  
Hai Hao ◽  
Xing-lu Zhang ◽  
Vladimir Karpov
Keyword(s):  
Casting Technique ◽  
Mold Casting

Structural Analysis and Lightweight Design for Cab Overturned Support of a Medium-Duty Truck

2012 ◽  
Vol 479-481 ◽  
pp. 2446-2451 ◽  
Author(s):  
Yu De Dong ◽  
Yong Jun Liu ◽  
Ling Lan Wang ◽  
Ting Zhao Li ◽  
Yi Kui Yang ◽  
...  
Keyword(s):  
3D Model ◽  
Lightweight Design ◽  
Work Conditions ◽  
Analysis Method ◽  
Casting Method ◽  
Element Analysis ◽  
Casting Technique ◽  
Finite Element Analysis Method ◽  
Mold Casting ◽  
Vehicle Components

To adapt to the trend of lightweight of vehicles, and optimize the structure of vehicle components, the former overturned support of a medium-duty truck cab was optimized by lightweight design. The 3d model of the cabin former overturned support was firstly established, and then finite element analysis method was used to analyze the distributions of stress and displacement, with the support under extreme work conditions. And then a lightweight design was made basing on the analysis. The support blank is produced by permanent mold casting method. To meet the requirement of actual production, this paper, analyzed the casting defects of the structure by lightweight design, and then had a further modification basing on the actual casting technique. The results indicate that the weight of the cab support is reduced 23.2%, with lightweight design reducing the support weight effectively under safety. And the modifications of the structure casting performance meet better the structural optimization objective, and make the production of the cab support more efficient.

scholarly journals A Multiple Twin-Roller Casting Technique for Producing Metallic Glass and Metallic Glass Composite Strips

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3842
Author(s):  
Wu ◽  
Zhang ◽  
Chen ◽  
Li ◽  
Zhang
Keyword(s):  
Metallic Glass ◽  
Melt Spinning ◽  
Amorphous State ◽  
Glass Composite ◽  
Solidification Temperature ◽  
Casting Technique ◽  
Glass Composites ◽  
Mold Casting ◽  
Temperature Ranges ◽  
The Common

To date it has not been possible to produce metallic glass strips with a thickness larger than 150 m via single-roller melt spinning technique, and it remains challenging to produce thick metallic glass strips. In this work, a multiple twin-roller casting technique is proposed for producing thick metallic glass and metallic glass composite strips. A triple twin-roller casting device, as a specific case of the multiple twin-roller, was designed and manufactured. The triple twin-roller device possesses a high cooling rate and involves a long contact time between the melt and the strip, which makes it an efficient technique for producing metallic glass strips that avoids crystallization, although the solidification temperature ranges of metallic glasses are as wide as several hundred Kelvins. The two prepared metallic glass (MG) strips are in a fully amorphous state, and the MG strip shows excellent capacity of stored elastic energy under 3-point bending. Furthermore, the Ti-based metallic glass composite strip produced via the triple twin-roller casting exhibits a novel microstructure with much finer and more homogenously orientated -Ti crystals, as compared with the microstructure of metallic glass composites produced by the common copper mold casting technique.

Preliminary Study into Shell Mold Casting of Nominal 60-Nitinol Alloy

1973 ◽  
Author(s):  
William J. Buehler ◽  
Richard E. Jones ◽  
Ernest F. Heintzelman ◽  
Richard H. Lundsten
Keyword(s):  
Shell Mold ◽  
Mold Casting ◽  
Preliminary Study ◽  
Nitinol Alloy

Fabrication of Lotus-Type Porous Magnesium with Anisotropic Directional Pores by Mold Casting Technique

2010 ◽  
Vol 658 ◽  
pp. 201-206
Author(s):  
K. Sugihara ◽  
S. Suzuki ◽  
Hideo Nakajima
Keyword(s):  
Temperature Gradient ◽  
Hydrogen Atmosphere ◽  
Lateral Side ◽  
Anisotropic Growth ◽  
Two Dimensional ◽  
Differential Analysis ◽  
Casting Technique ◽  
Mold Casting ◽  
Porous Magnesium ◽  
Good Agreement

Lotus-type porous magnesium ingots were fabricated in pressurized hydrogen atmosphere through a mold casting technique. The mold consists of two cooling blocks placed at the bottom and one lateral side. It was found that the pores started to grow upwards and horizontally and the both directional pores collapsed and then shifted to the direction. Such anisotropic growth of pores is in good agreement with the map of temperature gradient predicted by two-dimensional finite differential analysis.

scholarly journals Graphene-PSS/l-DOPA nanocomposite cation exchange membranes for electrodialysis desalination

2020 ◽  
Vol 7 (10) ◽  
pp. 3108-3123
Author(s):  
Adetunji Alabi ◽  
Levente Cseri ◽  
Ahmed Al Hajaj ◽  
Gyorgy Szekely ◽  
Peter Budd ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Vinylidene Fluoride ◽  
Casting Technique ◽  
Mold Casting ◽  
Poly Vinylidene Fluoride

This research reports the fabrication of nanocomposite cation exchange membranes by incorporating negatively charged graphene-based nanomaterials into a non-charged poly(vinylidene fluoride) matrix using a mold-casting technique developed in-house.

scholarly journals Development of a High Strength Zinc Alloy for Molding Tools Fabricated by a New Sand Mold Casting Technique

1997 ◽  
Vol 38 (5) ◽  
pp. 457-463
Author(s):  
Jiro Yamashita ◽  
Masumi Kunii ◽  
Teruo Ohashi
Keyword(s):  
High Strength ◽  
Sand Mold ◽  
Zinc Alloy ◽  
Casting Technique ◽  
Mold Casting

scholarly journals PENGEMBANGAN PROSES PEMBUATAN IMPELLER DENGAN CETAKAN KULIT

2018 ◽  
Vol 8 (3) ◽  
pp. 115-119
Author(s):  
Suharno ◽  
Amin Suhadi
Keyword(s):  
Shell Mold ◽  
Mold Casting

Impeller merupakan komponen pompa air yang cukup vital dan umumnya terbuat dari kuningan yangharganya relatif mahal, maka dilakukan pengembangan dan dibuat dengan material paduan aluminium yanglebih murah. pembuatannya dicor dengan metode cetakan kulit (shell mold casting) Alat peleburanmenggunakan tungku crucible sederhana. Untuk mendapatkan performa dan karakteristik pada materialdengan uji mekanis dan fisik yaitu uji tarik, uji kekerasan, uji impak, uji komposisi material serta strukturmikro. Cetakan cor terbuat dari pasir cor jenis silika (SiO2) dengan ukuran butiran 0.06–0.1 mm, dengancampuran resin fenol dan katalis sebagai pengikat dan pengering resin. Komposisi aluminium paduan dibuattiga variabel, 1% Cu, 3% Cu dan 5% Cu.Kekuatan tarik maksimum 9950 N/mm², kekerasan maksimum 376N/mm², tenaga pukul impak 45 Joule.

Precipitation of NiHfsi phase in NiAl single crystals containing Hf

1995 ◽  
Vol 53 ◽  
pp. 532-533
Author(s):  
A. Garg ◽  
R. D. Noebe ◽  
R. Darolia
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
High Temperature Strength ◽  
Bridgman Technique ◽  
Shell Mold ◽  
Third Phase ◽  
Unknown Phase ◽  
Transmission Electron ◽  
Two Phases ◽  
Nial Matrix

Small additions of Hf to NiAl produce a significant increase in the high-temperature strength of single crystals. Hf has a very limited solubility in NiAl and in the presence of Si, results in a high density of G-phase (Ni16Hf6Si7) cuboidal precipitates and some G-platelets in a NiAl matrix. These precipitates have a F.C.C structure and nucleate on {100}NiAl planes with almost perfect coherency and a cube-on-cube orientation-relationship (O.R.). However, G-phase is metastable and after prolonged aging at high temperature dissolves at the expense of a more stable Heusler (β'-Ni2AlHf) phase. In addition to these two phases, a third phase was shown to be present in a NiAl-0.3at. % Hf alloy, but was not previously identified (Fig. 4 of ref. 2 ). In this work, we report the morphology, crystal-structure, O.R., and stability of this unknown phase, which were determined using conventional and analytical transmission electron microscopy (TEM).Single crystals of NiAl containing 0.5at. % Hf were grown by a Bridgman technique. Chemical analysis indicated that these crystals also contained Si, which was not an intentional alloying addition but was picked up from the shell mold during directional solidification.

Some quantitative applications of vascular corrosion casting

1992 ◽  
Vol 50 (1) ◽  
pp. 738-739
Author(s):  
Fred E. Hossler
Keyword(s):  
Blood Vessels ◽  
Nuclear Orientation ◽  
Three Dimensional ◽  
Surrounding Tissue ◽  
Confocal Laser ◽  
Corrosion Casting ◽  
Venous Valve ◽  
Casting Technique ◽  
Low Viscosity ◽  
Quantitative Measurements

Preparation of replicas of the complex arrangement of blood vessels in various organs and tissues has been accomplished by infusing low viscosity resins into the vasculature. Subsequent removal of the surrounding tissue by maceration leaves a model of the intricate three-dimensional anatomy of the blood vessels of the tissue not obtainable by any other procedure. When applied with care, the vascular corrosion casting technique can reveal fine details of the microvasculature including endothelial nuclear orientation and distribution (Fig. 1), locations of arteriolar sphincters (Fig. 2), venous valve anatomy (Fig. 3), and vessel size, density, and branching patterns. Because casts faithfully replicate tissue vasculature, they can be used for quantitative measurements of that vasculature. The purpose of this report is to summarize and highlight some quantitative applications of vascular corrosion casting. In each example, casts were prepared by infusing Mercox, a methyl-methacrylate resin, and macerating the tissue with 20% KOH. Casts were either mounted for conventional scanning electron microscopy, or sliced for viewing with a confocal laser microscope.

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