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The Scientific World Journal
Volume 2014, Article ID 841549, 6 pages
http://dx.doi.org/10.1155/2014/841549
Research Article

Experimental Study of Direct Laser Deposition of Ti-6Al-4V and Inconel 718 by Using Pulsed Parameters

1Institute of Mechatronics Engineering, University of Engineering & Technology, Peshawar 25100, Pakistan
2Mechanical Engineering Department, University of Engineering & Technology, Peshawar 25000, Pakistan

Received 31 August 2013; Accepted 27 November 2013; Published 30 January 2014

Academic Editors: D. Hotza and A. Tonkikh

Copyright © 2014 Kamran Shah et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Laser direct metal deposition (LDMD) has developed from a prototyping to a single metal manufacturing tool. Its potential for creating multimaterial and functionally graded structures is now beginning to be explored. This work is a first part of a study in which a single layer of Inconel 718 is deposited on Ti-6Al-4V substrate. Single layer tracks were built at a range of powder mass flow rates using a coaxial nozzle and 1.5 kW diode laser operating in both continuous and pulsed beam modes. This part of the study focused on the experimental findings during the deposition of Inconel 718 powder on Ti-6Al-4V substrate. Scanning electron microscopy (SEM) and X-ray diffraction analysis were performed for characterization and phase identification. Residual stress measurement had been carried out to ascertain the effects of laser pulse parameters on the crack development during the deposition process.