scholarly journals PENGARUH PENAMBAHAN NIKEL TERHADAP KEKUATAN TARIK DAN KEKERASAN PADA BESI TUANG NODULAR 50

2017 ◽  
Vol 8 (2) ◽  
pp. 41
Author(s):  
Sudarmanto Sudarmanto
Keyword(s):  
Cast Iron ◽  
New Technologies ◽  
Low Cost ◽  
Nodular Cast Iron ◽  
Experimental Results ◽  
Base Metals ◽  
Spherical Structure ◽  
Properties Of Materials ◽  
Nodular Graphite

Nodular cast iron is the cast iron that has nodular graphite spherical structure distributed in ferrite or pearlite matrix or in both of them. Recently, this material is used widely in industries because its low cost and better performance. The advanced metal industries nowadays have found some new technologies in order to improve the properties of materials. One of them is the addition of another elements into the base metals, such as nickel. The effects of the addition 1wt %, 2wt % and 3wt % nickel into nodular cast iron 50 on tensile and hardness properties were investigated in this study. The experimental results show that the best amount of nickel that added into nodular cast iron is 3% wt, which has the best tensile and hardness properties

Semisolid Forging of Hypereutectic Al-Si Alloy for Automobile AC Compressor Components

2012 ◽  
Vol 192-193 ◽  
pp. 551-555
Author(s):  
Zhi Feng Zhang ◽  
Jun Xu ◽  
Yue Long Bai ◽  
Ya Bao Wang
Keyword(s):  
Cast Iron ◽  
High Performance ◽  
Low Cost ◽  
Nodular Cast Iron ◽  
Transportation Systems ◽  
Light Metals ◽  
Forming Process ◽  
Forging Process ◽  
Swash Plate ◽  
Near Net Shape

Semisolid forging process, characterized by short process, near-net shape, low cost, and high performance, is increasingly playing an important role in lightweighting transportation systems for light metals. In this study, semisolid forging process for hypereutectic Al-Si alloy, as a substitute for nodular cast iron, was applied in producing automobile AC compressor components. The results showed that hypereutectic Al-Si alloy swash plate thixo-forged had higher strength than nodular cast iron one by optimizing forming process parameters.

A Study of the Shrinkage and Dilatation during Solidification of Nodular Cast Iron - its Relation to the Morphology of Crystallisation

1984 ◽  
Vol 34 ◽  
Author(s):  
R. Hummer
Keyword(s):  
Cast Iron ◽  
Nodular Cast Iron ◽  
Operating Conditions ◽  
Cooling Curves ◽  
The Real ◽  
Solidification Behaviour ◽  
Feeding Technique ◽  
Nodular Graphite

ABSTRACTThis study deals with the solidification behaviour of cast iron with nodular graphite. By measurement of the “apparent shrinkage” the real feeding requirement can be determined under operating conditions. By means of cooling curves and measurements of dilatation the mode of solidification is established. The results are in accordance with today's knowledge of the morphology of crystallisation and offer an operating hypothesis for feeding technique in practice.

scholarly journals Cellular Automaton Simulation For Volume Changes Of Solidifying Nodular Cast Iron

2015 ◽  
Vol 60 (3) ◽  
pp. 2379-2384 ◽  
Author(s):  
A. Burbelko ◽  
D. Gurgul ◽  
E. Guzik ◽  
W. Kapturkiewicz
Keyword(s):  
Cast Iron ◽  
Cellular Automaton ◽  
Weighted Average ◽  
Nodular Cast Iron ◽  
Phase Volume ◽  
Volume Changes ◽  
Phase Density ◽  
Concentration Changes ◽  
Nodular Graphite ◽  
2D Space

AbstractVolume changes of the binary Fe-C alloy with nodular graphite were forecast by means of the Cellular Automaton Finite Differences (CA-FD) model of solidification. Simulations were performed in 2D space for differing carbon content. Dependences of phase density on temperature were considered in the computations; additionally density of the liquid phase and austenite were deemed as a function of carbon concentration. Changes of the specific volume were forecast on the base of the phase volume fractions and changes of phase density. Density of modeled material was calculated as weighted average of densities of each phase.

Microstructures and Properties of Bainitic Nodular Cast Iron Treated by Controlled Cooling and Austempering Treatment

2010 ◽  
Vol 152-153 ◽  
pp. 259-262
Author(s):  
Ke Gao Liu ◽  
Ai Min Xu ◽  
Dong Xiang ◽  
Bin Xu
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Elevated Temperatures ◽  
Nodular Cast Iron ◽  
Lower Bainite ◽  
Salt Bath ◽  
Controlled Cooling ◽  
Electric Oven ◽  
Upper Bainite ◽  
Nodular Graphite

The mixed structures of bainite matrix, austenite and nodular graphite were obtained in nodular cast iron treated by controlled cooling and austempering in electric oven instead of nitrate salt bath. The relations between bainitic morphology and mechanical properties were investigated. Experimental results show that, the nodular cast iron treated by controlled cooling in water bath and austempering has microstructures of upper bainite and austenite, the mechanical properties fluctuate greatly due to its relatively narrow temperature region in processing. The consistency of mechanical properties of lower bainite nodular cast iron is superior to upper bainite nodular cast iron. The comprehensive mechanical properties of lower bainite nodular cast iron are improved by tempering. However, the brittleness increases greatly when martensite appears in mixed structures, while good mechanical properties can still be obtained by tempering at elevated temperatures.

scholarly journals Effect of the Annealing Temperature on the Microstructure and Properties of Ausferritic Nodular Cast Iron

2016 ◽  
Vol 16 (3) ◽  
pp. 43-48 ◽  
Author(s):  
G. Gumienny ◽  
L. Klimek ◽  
B. Kurowska
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Impact Strength ◽  
Lamellar Structure ◽  
Annealing Temperature ◽  
Nodular Cast Iron ◽  
Iron Matrix ◽  
Secondary Carbides ◽  
Nodular Graphite ◽  
The Impact

Abstract The paper presents the microstructure and selected properties of ausferritic nodular cast iron annealed at the temperature 520 and 550°C. This choice was dictated by the temperatures used in the practice of nitriding. Nodular graphite in cast iron was obtained with use of Inmold process. Cast iron containing molybdenum and copper ensuring obtaining an ausferrite in the cast iron matrix without the use of heat treatment of castings was tested. The effect of annealing temperature on the microstructure and the kind of fracture of the ausferritic nodular cast iron was presented. The effect of an annealing temperature on hardness, impact strength and the microhardness of ausferritic nodular cast iron matrix was shown too. The lamellar structure of phases in the cast iron matrix after annealing has been ascertained. There has been an increase in hardness of an annealed cast iron and microhardness of its matrix. The reduction in the impact strength of the cast iron annealed at 520 and 550°C was approximately 10-30%. Both an increase in the hardness of cast iron as well as an decrease in its impact strength is probably due to the separation of secondary carbides during the heat treatment.

scholarly journals Novel Absolute Rotary Position Sensor Based on Combination of Gray Scale Pattern Disc

2021 ◽  
Author(s):  
Ji Myong Choe ◽  
Nam Chol Yu ◽  
Nam Jin Ri ◽  
Mu Song An ◽  
Un Chol Kim
Keyword(s):  
New Technologies ◽  
Low Cost ◽  
Rapid Development ◽  
Angular Position ◽  
Gray Code ◽  
Measurement Range ◽  
Experimental Results ◽  
Position Sensor ◽  
Gray Scale ◽  
Measurement And Control

Abstract Absolute rotary angular /position sensors play an important role in various applications and rapid development of new technologies requires further accurate measurement and control. In this paper, a novel, very simple, low-cost and high accurate absolute rotary angular/ position sensor is presented. The sensor operation is based on the combination of circular gradient gray scale and gray code pattern. A simple experiment is done in order to demonstrate proof of concept of proposed sensor. The experimental results show that the proposed absolute rotary angular/position sensor has excellent linear characteristics with accuracy below ±1° and resolution of 0.1° within the full measurement range from 0° to 360°. The proposed idea and experimental results can be helpful to design absolute rotary angular/position sensor to improve performance of it.

scholarly journals Estimating the Effective Elastic Parameters of Nodular Cast Iron from Micro-Tomographic Imaging and Multiscale Finite Elements: Comparison between Numerical and Experimental Results

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 695
Author(s):  
Andre Pereira ◽  
Marcio Costa ◽  
Carla Anflor ◽  
Juan Pardal ◽  
Ricardo Leiderman
Keyword(s):  
Cast Iron ◽  
Finite Elements ◽  
Nodular Cast Iron ◽  
Tomographic Imaging ◽  
Experimental Results ◽  
Elastic Parameters ◽  
Computational Costs ◽  
Computational Implementation ◽  
Micro Tomography ◽  
Multiscale Finite Elements

Herein, we describe in detail a methodology to estimate the effective elastic parameters of nodular cast iron, using micro-tomography in conjunction with multiscale finite elements. We discuss the adjustment of the image acquisition parameters, address the issue of the representative-volume choice, and present a brief discussion on image segmentation. In addition, the finite-element computational implementation developed to estimate the effective elastic parameters from segmented microstructural images is described, indicating the corresponding computational costs. We applied the proposed methodology to a nodular cast iron, and estimated the graphite elastic parameters through a comparison between the numerical and experimental results.

Developing an Inkjet Printer I: RGB Image to CMY Ink Amounts - Image Processing and Color Management

2020 ◽  
Vol 2020 (15) ◽  
pp. 350-1-350-10
Author(s):  
Yin Wang ◽  
Baekdu Choi ◽  
Davi He ◽  
Zillion Lin ◽  
George Chiu ◽  
...  
Keyword(s):  
Image Processing ◽  
Low Cost ◽  
Experimental Results ◽  
Color Management ◽  
Finger Nail ◽  
Inkjet Printer ◽  
Rgb Image ◽  
Novel Algorithm

In this paper, we will introduce a novel low-cost, small size, portable nail printer. The usage of this system is to print any desired pattern on a finger nail in just a few minutes. The detailed pre-processing procedures will be described in this paper. These include image processing to find the correct printing zone, and color management to match the patterns’ color. In each phase, a novel algorithm will be introduced to refine the result. The paper will state the mathematical principles behind each phase, and show the experimental results, which illustrate the algorithms’ capabilities to handle the task.

scholarly journals IoT Platform for Energy Sustainability in University Campuses

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 357
Author(s):  
Pedro Moura ◽  
José Ignacio Moreno ◽  
Gregorio López López ◽  
Manuel Alvarez-Campana
Keyword(s):  
Energy Demand ◽  
New Technologies ◽  
Low Cost ◽  
Sustainable Use ◽  
High Energy ◽  
Appropriate Technology ◽  
Monitoring And Control ◽  
Energy Sustainability ◽  
University Campuses ◽  
Iot Platform

University campuses are normally constituted of large buildings responsible for high energy demand, and are also important as demonstration sites for new technologies and systems. This paper presents the results of achieving energy sustainability in a testbed composed of a set of four buildings that constitute the Telecommunications Engineering School of the Universidad Politécnica de Madrid. In the paper, after characterizing the consumption of university buildings for a complete year, different options to achieve more sustainable use of energy are presented, considering the integration of renewable generation sources, namely photovoltaic generation, and monitoring and controlling electricity demand. To ensure the implementation of the desired monitoring and control, an internet of things (IoT) platform based on wireless sensor network (WSN) infrastructure was designed and installed. Such a platform supports a smart system to control the heating, ventilation, and air conditioning (HVAC) and lighting systems in buildings. Furthermore, the paper presents the developed IoT-based platform, as well as the implemented services. As a result, the paper illustrates how providing old existing buildings with the appropriate technology can contribute to the objective of transforming such buildings into nearly zero-energy buildings (nZEB) at a low cost.

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