Surface alloying of OHNS die steel by EDM process using Inconel electrode
by Sanjeev Kumar, T.P. Singh, B.L. Sethi
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 6, No. 3/4, 2009

Abstract: The last decade has seen an increasing interest in the application of electrical discharge machining (EDM) as a surface modification process. Erosion of the tool material takes place during machining and some of it gets alloyed with the work piece surface. Deliberate material transfer may be carried out by using composite electrodes or by dispersing metallic powders in the dielectric medium. This paper reports the results of experimental investigations into electrical discharge machining of OHNS die steel with Inconel (an alloy of chromium, nickel and iron) electrode under machining conditions favouring high electrode wear. For comparison, the work material was also machined with copper electrode. Results show 88% improvement in micro-hardness of the machined surface. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis reveal transfer of chromium and nickel from the tool electrode. Chemical composition of the machined surface was further checked on optical emission spectrometer.

Online publication date: Mon, 20-Jul-2009

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Machining and Machinability of Materials (IJMMM):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email