NDLI: Comparative Study on Electrical Discharge Machining of Ultrafine-Grain Al, Cu, and Steel

Content Provider	Springer Nature Link
Author	Mahdieh, Mohammad Sajjad Mahdavinejad, RamezanAli
Copyright Year	2016
Abstract	Recently, manufacturing of industrial parts out of ultrafine-grain (UFG) materials became prevalent due to their lightweight and high strength. Machining processes such as electrical discharge machining (EDM) are necessary to produce parts with accurate dimensions and tolerance. On the other hand, recast layer, heat-affected zone (HAZ), and the micro-cracks are the effects of the EDM process, reducing the surface integrity of the workpieces. These undesirable effects are more noticeable on the UFG materials because of the excess energy stored in them. This excess stored energy is because of the high strain and stress imposed on the microstructure of UFG material during severe plastic deformation processes. In this article, a comparative study is conducted about the effects of the EDM process on three applicable UFG materials: aluminum, steel, and copper. These UFG materials are produced by equal channel angular pressing, which is a well-known method in producing UFG materials. The surface integrity factors including thickness of recast layer and HAZ, cracks density, micro-hardness, and surface roughness are measured and investigated via optical microscopy, scanning electron microscopy, X-ray diffraction technique, roughness tester, and micro-hardness tester. Results show that after the EDM process, thicker recast layer, and HAZ, more cracks density and more microstructural changes are observed among the UFG aluminum samples than among the copper and steel samples.
Starting Page	6237
Ending Page	6247
Page Count	11
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	47
Issue Number	12
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2016-10-03
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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