Fatigue behavior and tribological properties of laser additive manufactured aluminum alloy/boron nitride nanosheet nanocomposites

• DOI: 10.1016/j.jmrt.2022.08.124
• Publication Date: 2022-08-31T10:27:20Z
• Authors: Caiying Chen; Sherif Araby; Murat Demiral; Rui Cai; Xuanyi Yang; Wei Wang; Qingshi Meng
• Keywords: Ball milling; Wear resistance; Mining engineering. Metallurgy; Aluminum matrix composites; 0203 mechanical engineering; XFEM; Fatigue performance; TN1-997; Laser metal deposition; 02 engineering and technology

Laser additive manufacturing is a promising approach to prepare near-neat shape parts from Al nanocomposites with high mechanical and tribological properties. Owing its lubricious nature, boron nitride nanosheets (BNNSs) were added into AlSi10Mg alloy via high-speed ball milling laser metal deposition (LMD) manufacture self-lubricating outstanding wear resistance fatigue performance. The study shows that number of cycles-to-failure due tensile increased 103 for pure 106 upon adding only 0.1 wt% BNNSs. At 0.2 BNNSs, the friction coefficient wear-out volume decrease by 58% 57%, respectively. Scanning electron microscopy micrographs show has worn surface grooves, wide ridges, debris large protrusions material along groove edges. mechanism mainly plastic deformation, delamination adhesion in AlSi10Mg. On other hand, LMD-built AlSi10Mg/BNNS composites exhibit less rough clear trails thin lubricant layer formed extruded BNNSs during test. An extended finite element model crack propagation testing developed, where obtained results are accord experimental measurements. present technology capable fabricate matrix tailored properties various design applications.