Parametric study of development of inconel-steel functionally graded materials by laser direct metal deposition

Shah, Kamran and ul Haq, Izhar and Khan, Ashfaq and Shah, Shaukat Ali and Khan, Mushtaq and Pinkerton, Andrew (2014) Parametric study of development of inconel-steel functionally graded materials by laser direct metal deposition. Materials and Design, 54. pp. 531-538. ISSN 0261-3069

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Abstract

Laser direct metal deposition (LDMD) has developed from a prototyping to a single and multiple metals manufacturing technique. It offers an opportunity to produce graded components, with differing elemental composition, phase and microstructure at different locations. In this work, continuously graded Stainless Steel 316L and Inconel 718 thin wall structures made by direct laser metal deposition process have been explored. The paper considers the effects of process parameters including laser power levels and powder mass flow rates of SS316L and Inconel 718 during the deposition of the Steel–Ni graded structures. Microstructure characterisation and phase identification are performed by optical microscopy and X-ray diffraction techniques. Mechanical testing, using methods such as hardness, wear resistance and tensile testing have been carried out on the structures. XRD results show the presence of the NbC and Fe2Nb phases formed during the deposition. The effect of experimental parameters on the microstructure and physical properties are determined and discussed. Work shows that mechanical properties can be controlled by input parameters and generation of carbides provides an opportunity to selectively control the hardness and wear resistance of the functionally graded material.

Item Type:
Journal Article
Journal or Publication Title:
Materials and Design
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2210
Subjects:
ID Code:
68242
Deposited By:
Deposited On:
24 Jan 2014 05:43
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Dec 2020 12:11