Decarburization Effects on Fatigue Behavior of Leaf Spring Material

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2013

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SAE International

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Department of Metallurgical and Materials Engineering
Metalurji ve Malzeme Mühendisliğinin alanı çok geniştir ve temel olarak metaller, seramikler, polimerler ve bu üç malzemenin birlikte oluşturdukları kompozit malzemelerin üretimlerini, şekillendirilmelerini, işlemlerini, karakterizasyonlarını ve kullanımlarındaki davranışlarını kapsar. Yüksek Lisans programımızda amacımız, öğrencilerimizin bu konulardan bir veya birkaçında kapsamlı ve derin bir kuramsal ve uygulamalı bilgi birikimine sahip olmaları ve bilgiye ulaşma, ulaşılan bilgileri değerlendirme, deney tasarlama, deney sonuçlarını analiz etme ve raporlama yeteneklerini kazanmalarıdır. Web sayfamızda yer alan bilgilerden de görülebileceği gibi modern cihaz ve ekipmanla donatılmış güçlü laboratuvar altyapımız çok farklı konularda araştırma yapılmasını olanaklı kılmaktadır. Yüksek Lisans müfredatımızda Malzemelerin İleri Termodinamiği, Malzeme Mühendisliğinde Matematiksel Yöntemler ve Malzeme-Süreç Seçimi ve Tasarım Problemleri isimli üç zorunlu ders yer almaktadır. Tezli Yüksek Lisans programımız bu zorunlu derslerin yanında zorunlu olan Seminer, Yüksek Lisans Tezi ve dört teknik seçmeli dersten, Tezsiz Yüksek Lisans programımız ise zorunlu olan Bitirme Projesi ve 7 teknik seçmeli dersten oluşmaktadır. Teknik seçmeli dersler tez danışmanının onayı dâhilinde çok sayıdaki teknik seçmeli ders arasından seçilmektedir. Programımıza Metalurji ve Malzeme Mühendisliği mezunlarının yanısıra diğer Mühendislik Bölümleri ile Fizik, Kimya vb. bölümlerin mezunları da kabul edilebilmektedir. Bu bölümlerden mezun olan adayların, her birinin akademik ve profesyonel birikimlerine göre belirlenecek bir bilimsel hazırlık programını tamamlamaları gerekmektedir.
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Law
(2003)
Started in 2003 with 21 students, the Atılım University School of Law has so far graduated over 1700 students, and currently offers education for more than 1300 students. With the aim stressed by our Founding Dean Prof. Dr. Nami Çağan, we grant students with the background that allows them to access and evaluate information, rather than overloading them with information dumps during our education and training in the field of law. With a curriculum prepared with this approach and our mission in mind, we aim to graduate our students as actual legal experts who have internalized ethical rules, who are knowledgeable in terms of rules and institutions; and who are cultured, versatile, broad-visioned and inquisitive. In addition to basic courses in law conducted by our academic staff as pioneers of their field with respect to these principles, elective courses are available pursuant to current events such as those in mediation for legal disagreements, law and women, sports law, informatics law, media law and legal English; as well as law clinics to offer effective and interactive education. In addition, graduate and doctorate degree programs, alongside certificate programs such as those to train experts, peace-makers, mediators, and trustees in composition, are underway. A member of the European Law Faculties Association (ELFA), our School offers international relations and events, the Erasmus+ program, national and international fictional court contests, law and art days prepared by our student networks, or career forums in law to collaborate in the personal development of our students.

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Decarburization occurs on heat treated components. At leaf spring manufacturers, the occurrence of decarburization, which has a negative impact on fatigue, starts at hot rolled leaf spring steel raw materials' production process. The decarburization rate of the raw material, which is taken through a heat treatment, increases during the leaf spring manufacturing process. Through metallographic analyses and experimental tests, this study manifests how leaf spring's resistance to fatigue is affected by the correlation of ferrite structure occurred by decarburization on heat treated leaf springs, the surface hardness, and the permanent surface tension to be occurred during the shot peening process. This study conveys the techniques that can be applied to obtain low decarburization in leaf spring manufacturing, and the improvements achieved through optimization of high temperature treatment times of materials through use of thermographic survey at heat treatment furnaces. Copyright © 2013 SAE International.

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SAE Technical Papers -- SAE 2013 World Congress and Exhibition -- 16 April 2013 through 18 April 2013 -- Detroit, MI -- 97364

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2

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https://doi.org/10.4271/2013-01-0392
 https://hdl.handle.net/20.500.14411/3716

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