Erosion Behavior of Cr₃C₂-NiCr Coated GH4720Li Superalloy Under Different Impact Angles and Erodent Sizes: A Finite Element Analysis

Authors

  • Raffi Indrajati Department of Mechanical Engineering, Universitas Pembangunan Nasional Veteran Jakarta
  • Riki Hendra Purba Mechanical engineering department, Universitas Pembangunan Nasional Veteran Jakarta
  • James Julian Department of Mechanical Engineering, Universitas Pembangunan Nasional Veteran Jakarta
  • Fitri Wahyuni Department of Mechanical Engineering, Universitas Pembangunan Nasional Veteran Jakarta
  • Elvi Armadani Department of Industrial Engineering, Universitas Pembangunan Nasional Veteran Jakarta
  • Fathin Muhammad Mahdhudhu Department of Naval Architecture, Universitas Pembangunan Nasional Veteran Jakarta

DOI:

https://doi.org/10.21070/r.e.m.v11i2.1862

Keywords:

Solid particle erosion, Cr₃C₂-NiCr coating, GH4720Li superalloy, Finite element analysis, Impact angle, Particles sizes

Abstract

Solid particle erosion is a critical issue for turbine blade materials operating in harsh environments. This study investigates the erosion behavior of Cr₃C₂-NiCr coated GH4720Li superalloy using a three-dimensional single-particle finite element model. Silica sand particles with diameters of 0.3, 0.5, and 0.7 mm impacted the surface at 30°, 60°, and 90°, while material behavior was described by the strain-rate-dependent Cowper–Symonds model. The results show that both impact angle and particle size significantly affect stress distribution, plastic deformation, and erosion behavior. Higher impact angles and larger particles produce greater von Mises stress and effective plastic strain, with maximum values at 90° and 0.7 mm. The erosion mechanism changes from cutting at 30° to combined cutting and crater formation at 60°, and localized crater formation at 90°. The Cr₃C₂-NiCr coating improves erosion resistance by reducing stress concentration and plastic deformation through impact energy absorption and redistribution

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Published

2026-08-09

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Vol. 11 No. 2 (2026): In Progress

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Copyright (c) 2026 Raffi Indrajati, Riki Hendra Purba, James Julian, Fitri Wahyuni, Elvi Armadani, Fathin Muhammad Mahdhudhu

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