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The significance of melt pool variables in laser direct deposition of functionally graded aerospace alloys

Shah, K. and Salman, A. and Pinkerton, A. J. and Li, L. (2009) The significance of melt pool variables in laser direct deposition of functionally graded aerospace alloys. In: Proceedings of the 28th International Congress on Applications of Lasers and Electro-optics (ICALEO). Laser Institute of America, pp. 569-576.

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Abstract

Laser Direct Metal Deposition (LDMD) has developed for a range of diverse applications, from high precision manufacturing to repair. Although functional grading of surface coatings is well established, research into three-dimensional intermetallic grading as an alternative to welding is ongoing. This paper considers the functional grading of Ti-6Al-4V to Inconel 718 for aerospace applications. A 1.5 kW diode laser and LDMD system is used to produce a series of graded thin wall deposits. Images of the process are captured using Cu-vapour illumination and a high speed camera with long range microscopy optics and quantitative results extracted via image analysis. Process parameters, in process variables such as quantified melt pool disturbance, and final part characteristics are then correlated and discussed. By monitoring in process variables, the work aids in better understanding what happens during LDMD, especially when material transition occurs, and how this leads to final deposit characteristics.

Item Type: Contribution in Book/Report/Proceedings
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 59702
Deposited By: ep_importer_pure
Deposited On: 02 Nov 2012 16:27
Refereed?: No
Published?: Published
Last Modified: 10 Apr 2014 01:45
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59702

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