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Effect of austempering parameters on microstructure and mechanical properties of heavy section Machinable Austempered Ductile Cast Iron (MADI)
, Article Materials Research Express ; Volume 6, Issue 6 , 2019 ; 20531591 (ISSN) ; Varahram, N ; Sharif University of Technology
Institute of Physics Publishing
2019
Abstract
The first important limitation of ADI usage in industries is the machinability of the parts. Machinable Austempered Ductile Cast Iron (MADI) is a novel kind of ADI with improved properties such as better machinability compared to ADI and similar to as cast ductile iron. Furthermore, MADI has a higher strength than ductile iron at the same hardness value. The present work aimed to investigate into the impact of the austempering time and temperature on microstructure and mechanical properties of ductile iron samples prepared from Y-block with 75 mm thickness. In order to achieve the microstructure of the continuous matrix of equiaxed ferrite with islands of austenite, samples were partially...
Automatic Extraction of Semantic Web Service Composition Patterns
, M.Sc. Thesis Sharif University of Technology ; Habibi, Jafar (Supervisor)
Abstract
In today’s competitive world، web services have become more and more prevalent and their efficient discovery and composition in order to create novel functionalities is essential for variety of applications. Due to the large number of available services، the discovery of services is a difficult and time consuming task. Existing approaches in web services discovery and composition attempt to use simple web services while ignoring the use of once composed services. Reusing frequently used composite services can considerably increase performance of the entire system. Moreover، the advent of semantic web، as an effective solution of representing information interpretable by machines and none...
Investigation into microstructure and mechanical properties of heavy section nickel alloyed austempered ductile iron in accordance with austempering parameters
, Article Material Design and Processing Communications ; Volume 3, Issue 4 , 2021 ; 25776576 (ISSN) ; Varahram, N ; Perseh, Y ; Sharif University of Technology
John Wiley and Sons Inc
2021
Abstract
Austempered ductile iron (ADI) is one of the most widely used types of ductile iron produced by austempering heat treatment. ADI heavy section parts are employed in different industries owing to their unique mechanical properties. Cooling rate in thick parts is significantly low, so heavy section ductile iron parts should have an adequate austemperability for preventing pearlite formation in the middle of the casting. In order to achieve the proper austemperability and fully ausferritic structure, alloying elements like nickel are added to the melt. The objective of this work is to study the role of austempering parameters on nickel alloyed ADI specimens fabricated from 75-mm-thick Y-block....
A framework for estimation of complexity in agent oriented methodologies
, Article 7th IEEE/ACS International Conference on Computer Systems and Applications, AICCSA-2009, Rabat, 10 May 2009 through 13 May 2009 ; 2009 , Pages 645-652 ; 9781424438068 (ISBN) ; Taghiyareh, F ; Alinaghi, T ; Ghoroghi, C ; Moallem, A ; Sharif University of Technology
2009
Abstract
Agent-oriented software methodologies have found their way to become one of the most important issues of software development. The diversity of existing methodologies and the variety of newly arriving ones have arisen the question of which methodology is best in the context of a special problem, so the need for evaluating and comparing methodologies is becoming more important everyday. On the other hand evaluating methodologies can reveal their strengths and shortcomings which lead to an improvement in development of the next generation of agent-oriented methodologies. In this paper, we are going to introduce an approach for evaluating methodologies via the evaluation of their lifecycle...