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Processing & Characterization of LENSTM Deposited Co-Cr-W Alloy for Bio-Medical Applications
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| Author:
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GANZI SURESH, K L NARAYANA, M. KEDAR MALLIK, V. SRINIVAS, G. JAGAN REDDY
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| Abstract:
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Laser Engineered Net Shaping (LENSTM) is a promising metal 3D printing technology to fabricate near net shape and
dense parts with mechanical properties similar to that of wrought products. In this work, process optimization is carried
out to additively manufacture Co-Cr-W alloys using LENS to achievedense and harder deposits. Samples were
fabricated as per the Taguchi L-9 orthogonal array and analysis is carried through the ANOVA and Grey Relational
Grade Analysis method. Microstructure and microhardness measurements were taken across the build section to see for
variations in hardness and structure. Through this methodology, the primary process parameters, viz.laser power (LP),
Powder feed rate (PFR) and scan speeds (SS) can be optimized simultaneously for achieving a better combination of
multipleperformance characteristics.From the experimental results the multiple performance characteristics for density,
hardness and elastic modulus were achieved to be 99.9%, 500 HV and 200GPa respectively at an LP 250 W, SS 10 mm/s
and PFR 10 g/s.
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| Keyword:
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optimization; Laser engineered net shaping; Co-Cr-W alloy; grey relation grade; medical implants;
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| EOI:
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| DOI:
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| Download:
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