Effect of Laser Power on the Deposition of Alloy 718 Powder on Alumina Substrate Using Laser Directed Energy Deposition: A Single-Track Study

Choudary Ratnala, Dilipkumar,DoktorandHögskolan Väst,Avdelningen för svetsteknologi (SV),KAMPT (author)

Effect of Laser Power on the Deposition of Alloy 718 Powder on Alumina Substrate Using Laser Directed Energy Deposition : A Single-Track Study

CC BY NC 4.0
Welding or brazing of metals to ceramics often leads to failures under aggressive conditions due to abrupt changes in physical, chemical, and thermal properties at the metal-ceramic interface. Metal-ceramic Functional Graded Materials (FGMs) replace the strict interface with a gradual transition of composition and properties, which protects the material from failures. The powder-blown Laser-Directed Energy Deposition (DED-LB) is one of the widely known Additive Manufacturing (AM) processes that offer unique features like developing FGMs and multi-material structures. Various studies have been conducted to process metalceramic FGMs using the DED-LB process but significant differences in thermal properties, varying laser-material interactions, and the possibility of formation of complex reaction products make the processing of metal-ceramic FGMs challenging. This study aims to understand the effect of laser power on a ceramic substrate, and its interaction with a metal powder introduced in the melt pool. A single track of nickel-based superalloy Alloy 718 powder was deposited on an Alumina substrate with different laser powers. The deposition was performed with and without substrate pre-heat to understand the effect of pre-treatment on deposition. Metallographic analysis was performed to reveal the microstructure of the resolidified metal mixed ceramic region

Hanning, FabianHögskolan Väst,Avdelningen för maskinteknik,KAMPT(Swepub:hv)faha0010 (author)
Andersson, Joel,1981-Högskolan Väst,Avdelningen för maskinteknik,KAMPT(Swepub:hv)joan0056 (author)
Joshi, Shrikant V.,1960-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT(Swepub:hv)shrjos (author)
Högskolan VästAvdelningen för svetsteknologi (SV) (creator_code:org_t)

In:Sustainable Production through Advanced Manufacturing, Intelligent Automation and Work Integrated Learning: IOS Press, s. 111-12197816436851069781643685113

By the author/editor: Choudary Ratnala ...; Hanning, Fabian; Andersson, Joel, ...; Joshi, Shrikant ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

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