Machinability evaluations of austempered ductile iron and cast steel with similar mechanical properties under eco-friendly milling conditions

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Date

2021

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Elsevier

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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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Manufacturing Engineering
(2003)
Opened in 2003 with the aim to graduate experts in the field of machine-production, our Department is among the firsts in our country to offer education in English. The Manufacturing Engineering program focuses on the manufacturing technologies that shape materials from raw materials to final products by means of analytical, experimental and numerical modeling methods. First Manufacturing Engineering Program to be engineered by Müdek, our department aims to graduate creative and innovative Manufacturing Engineers that are knowledgeable in the current technology, and are able to use production resources in an effective and sustainable way that never disregards environmental facts. As the first Department to implement the Cooperative Education Program at Atılım University in coordination with institutions from the industry, the Manufacturing Engineering offers a practice-oriented approach in education with its laboratory infrastructure and research opportunities. The curriculum at our department is supported by current engineering software, and catered to creating engineers equipped to meet the needs of the production industry.

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Abstract

In engineering applications, to increase productivity and to decrease production costs, the selection of the proper engineering material is essential. At that point, machining operations directly affect the production costs. Therefore, determination of the material with the desired mechanical properties and easy-to-cut characteristics has a critical importance. This situation is currently gaining more importance in especially defense industry applications in which high strength engineering materials are heavily employed. In addition, tool performance and final product quality are directly influenced by the cooling and/or lubrication conditions in particularly interrupted cutting operations. In this study, machinability characteristics of G18NiMoCr3-6+QT1 cast steel (CS) and 1050-6 austempered ductile iron (ADI) with similar mechanical properties during milling operations were investigated. The tests were performed using TiAlN coated cemented carbide (WC-Co) end mills under dry, conventional cutting fluid (CCF), and minimum quantity lubrication (MQL) conditions. Under each condition, the variations of cutting forces, tool wear, average surface roughness (Ra), and subsurface microstructure and microhardness were analyzed for both materials and then compared to one another. Test results showed that 1050-6 ADI led to further tool wear in comparison to G18NiMoCr3-6+QT1 CS. According to obtained results, dry condition is more favorable than CCF and MQL conditions in terms of cutting forces, surface roughness, and tool wear for both types of material. In addition, examinations on subsurface microstructures showed that MQL conditions provided an effective cutting environment to maintain microstructural stability of workpiece materials. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Description

Uçak, Necati/0000-0002-8582-5911; YILMAZ, Okan Deniz/0000-0002-5431-4334; Cicek, Adem/0000-0002-9510-3242

Keywords

Austempered ductile iron, Cast steel, Machinability, Microstructure

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Citation

9

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Source

Volume

11

Issue

Start Page

1443

End Page

1456

URI

https://doi.org/10.1016/j.jmrt.2021.01.123
 https://hdl.handle.net/20.500.14411/1915

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