Determination of residual stress distribution in high strength aluminum alloy after EDM

• Autorzy: Mehmood S. , Sultan A. , Anjum N. A. , Anwar W. , Butt Z.

Identyfikatory

DOI

10.12913/22998624/68729

• Języki publikacji: EN

Abstrakty

EN

Thermal energy produced by discrete and random electric sparks in electric discharge machining (EDM) melts surface material. A portion of this molten material is removed and the remaining material resolidified by rapid cooling in a hydrocarbon oil. The effect of repeated heating and cooling of the surface and sub surface material with complex temperature gradients results in residual stresses in machined parts. The aim of this investigation is to determine the distribution of residual stresses in the depth of machined material with respect to discharge current, most important electric parameter during EDM. It is well known that surface finish is dependent on discharge current. Therefore, investigations were carried out for smaller discharge current levels i.e. 3, 6, 9, 12 ampere. Hole-drill strain gauge method is used for the determination of residual stresses in the depth of material. For comparison purposes, residual stresses are also determined for conventionally turned specimens. This study provided quantitative analysis of the residual stresses for various discharge current in EDM which is a key parameter in deciding the service life of material.

Słowa kluczowe

EN

electric discharge machining; residual stresses; discharge current; aluminum alloy

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2017
• Tom: Vol. 11, no 1
• Strony: 29--35
• Opis fizyczny: Bibliogr. 24 poz., fig., tab.

Twórcy

autor

Mehmood S.

• University of Engineering and Technology Taxila, Mechanical Engineering Department, 47080 Taxila, Pakistan

autor

Sultan A.

• University of Engineering and Technology Taxila, Mechatronics Engineering Department, Chakwal Campus, 48800 Chakwal, Pakistan

autor

Anjum N. A.

• University of Engineering and Technology Taxila, Mechanical Engineering Department, 47080 Taxila, Pakistan

autor

Anwar W.

• Institute of Space Technology, Engineering Research and Development Sector, 44000 Islamabad, Pakistan

autor

Butt Z.

• University of Engineering and Technology Taxila, Mechatronics Engineering Department, Chakwal Campus, 48800 Chakwal, Pakistan

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)