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Article
Open AccessThermo-mechanical properties prediction of Ni-reinforced Al2O3 composites using micro-mechanics based representative volume elements
For effective cutting tool inserts that absorb thermal shock at varying temperature gradients, improved thermal conductivity and toughness are required. In addition, parameters such as the coefficient of therm...
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Article
A Stochastically Generated Geometrical Finite Element Model for Predicting the Residual Stresses of Thermally Sprayed Coatings Under Different Process Parameters
In this work, a 3D stochastic model coupled with a finite element (FE) code is used to investigate the development of residual stresses in thermally sprayed coatings. The residual stresses of a thermally spray...
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Article
Design and Performance Evaluation of Al2O3-SiC Composite for Direct-Bonded Copper Substrate
A computational material design approach is applied to propose a novel ceramic material for direct-bonded copper (DBC) substrate with enhanced thermal and structural performance. The material design inherently...
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Article
Conformal Collineations of the Ricci and Energy–Momentum Tensors in Static Plane Symmetric Space–Times
We provide a complete classification of static plane symmetric space–times according to conformal Ricci collineations (CRCs) and conformal matter collineations (CMCs) in both the degenerate and nondegenerate c...
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Article
Classification of locally rotationally symmetric Bianchi-I space–times using conformal Ricci collineations
We present a complete classification of locally rotationally symmetric (LRS) Bianchi-I space–times in accordance with their conformal Ricci collineations (CRCs). In the case where the Ricci tensor is nondegene...
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Article
Laser treatment of aluminum composite and investigation of thermal stress field
Laser surface melting of hot pressed aluminum composite tile, consisting of 90 % aluminum and 10 % WC, is carried out. Temperature and stress fields developed in the laser-treated region are modeled and predic...
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Article
Effect of 40-cm segment umbilical cord milking on hemoglobin and serum ferritin at 6 months of age in full-term infants of anemic and non-anemic mothers
To assess the effect of early clam** and milking of a 40-cm umbilical cord LUCM (long umbilical cord and milking) on hemoglobin (Hb) and serum ferritin concentrations at 6 months of age and to evaluate wheth...
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Article
Laser cutting of small diameter hole in aluminum foam
Laser cutting of a small diameter hole into aluminum foam is carried out, and thermal stress field developed in the cutting section is examined incorporating the finite element code. Laser cutting experiments ...
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Article
Laser nitriding of the surface of phosphor bronze
Phosphorous bronze finds applications in industry because of its resistance to fatigue and ease of heat dissipation due to its high thermal conductivity. Laser treatment of bronze surface improves the hardness...
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Chapter
CO2 Laser Cutting of Triangular Geometry in Aluminum Foam
In laser cutting process, thermal stress is formed around the cut edges, which becomes important for the geometries having the corners. In the present study, laser cutting of triangular shape in aluminum foam ...
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Article
Laser hole cutting into Ti-6Al-4V alloy and thermal stress analysis
Laser hole cutting into Ti-6Al-4V alloy is carried out. Temperature and stress fields during the cutting process are predicted using the finite element code. Temporal variation of surface temperature in the re...
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Article
Laser straight cutting of zirconia tiles
Laser straight cutting of zirconia is carried out. Temperature and stress fields developed in the cutting sections are predicted using the finite element code. The morphological changes in the cutting section ...
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Article
Laser straight cutting of alumina tiles: thermal stress analysis
In the present study, laser straight cutting of alumina tiles is carried out. Temperature and thermal stress fields developed in the cutting section are modeled and predicted through the finite element method....
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Article
Nitriding of Aluminum Extrusion Die: Effect of Die Geometry
Nitriding of complex-shaped extrusion dies may result in non-uniform nitride layers and hence a required hardness may not be achieved in some regions of the bearing area. The present study is carried out to as...
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Article
Influence of Surface Preparation on the Kinetics of Controlled Gas-Nitrided AISI H13 Steels Used in Extrusion Dies
In the aluminum extrusion practice, gas nitriding represents an important factor in enhancing the service life of AISI H13 steel dies. It is observed that if the die-bearing surface is not adequately prepared ...
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Article
Evaluation of gas nitriding process with in-process variation of nitriding potential for AISI H13 tool steel
Gas nitriding under controlled nitriding potential represents one of the important factors in enhancing the service life of dies used in the industry for hot aluminum extrusion. In the present study, AISI H13,...
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Article
Fatigue Failure of Extrusion Dies: Effect of Process Parameters and Design Features on Die Life
Analysis of die failure plays an important role in the prediction and prevention of die failure, and subsequently in improving economics of any metal-forming process. Industrial experience has shown that fract...
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Article
Effect of Al-6063 Billet Quality on the Service Life of Hot Extrusion Die: Metallurgical and Statistical Investigation
The current paper presents results about the effect of Al-6063 billet quality on the service life of AISI-H13 hot extrusion dies based on microstructural and statistical investigation. In the first half of the...
