Investigation of mechanical properties of electroless nickel plated micro-lattice structures


GÜMRÜK R. , UŞUN A.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.35, ss.1783-1798, 2020 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 35 Konu: 4
  • Basım Tarihi: 2020
  • Doi Numarası: 10.17341/gazimmfd.586438
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Sayfa Sayıları: ss.1783-1798

Özet

In this study, mechanical properties of electroless nickel coated micro lattice structures were parametrically studied with both experimental and finite element methods. The micro lattice structures are produced of micro struts with a diameter of approximately 200 mu m by selective laser melting (SLM) and are made of 316L stainless steel in the form of body centered cubic (BCC) structure. With electroless nickel coating method, a coating thickness of 17 mu m was obtained and as a result, compression tests showed a 50% increase in specific elasticity modules and a 75% increase in specific strength for micro lattice structures. The effects of coating thickness and cell size on the mechanical performance of micro lattice structures were investigated by finite element method. Material parameters required for finite element method were obtained by using nano-indentation tests on the coating and reverse finite element algorithms. Studies showed that; The mechanical and failure properties of the coating material have a significant effect on improving the mechanical properties of the coated micro lattices. As a result, it was determined that, with higher the specific strength and ductility of the coating material, higher mechanical properties of the stainless-steel micro lattice structures can be achieved.