High-speed grinding experiments were conducted on a nickel-based superalloy Inconel718 with the monolayer brazed wheel containing monocrystalline cubic boron nitride grains and polycrystalline cubic boron nitride grains. Comparative investigation on the wear behavior and self-sharpening phenomenon of polycrystalline cubic boron nitride and monocrystalline cubic boron nitride grains was carried out based on the fractal analysis. The results obtained indicate that the wear process of the monocrystalline cubic boron nitride grain cutting edges is, in order, attritious wear → large fracture → micro fracture → large fracture → attritious wear, while that of the polycrystalline cubic boron nitride grain cutting edges is micro fracture → attritious wear → micro fracture. Micro fracture of polycrystalline cubic boron nitride grain occurs easily in the particular zone where large impact load is formed due to the first contact between the grain cutting edges and the workpiece material. The fractal dimension of mono...

Comparative investigation on wear behavior and self-sharpening phenomenon of polycrystalline cubic boron nitride and monocrystalline cubic boron nitride grains in high-speed grinding

Mechanical synergistic interaction between adjacent corrosion defects and its effect on pipeline failure

Efficient prediction method of triple failure pressure for corroded pipelines under complex loads based on a backpropagation neural network

Metallographic method for temperature measurement: Reconstruction of grinding temperature field based on critical austenitizing depth and cyclic feedback algorithm

Numerical sensitivity analysis of corroded pipes and burst pressure prediction using finite element modeling

A novel model for prediction of burst capacity of corroded pipelines subjected to combined loads of bending moment and axial compression

. Embedded K nickel chrome-nickel silicon thermocouple was used to measure the grinding temperature of stainless steel in the cases of high-speed grinding while machining SUS304 Stainless Steel with vitrified CBN wheels in high speed grinding conditions.The energy partition is approximately 7.7% by matching the measured temperature to the analytically computed temperature. 3D FEM simulations for some typical grinding conditions are carried out.The error between the simulation analysis temperature results and the experimental results is approximately 3% on the grinding surface,and the error between the simulation analysis temperature results and the experimental results is approximately 10% below the grinding surface.

Temperature Measurement and Simulation in Stainless Steel High-Speed Grinding

Water evaporation is a ubiquitous natural process for collecting thermal energy from the environment. Carbon nanomaterial-based aerogels are good candidates for use as hydroelectric generators (HEGs), permitting substantial interaction with water through electronic coupling, and have been considered for application in evaporation-induced electricity generation. However, the water transport and electricity generation ability of the aerogels are affected by their pore structures. Inspired by the directional transport of the water vessel elements of the xylem, a biomimetic partially reduced graphene oxide aerogel (prGO) with an aligned porous structure is prepared, assisted by directional ice templating. The as-prepared prGO aerogel presents a high capillary water transport rate and can efficiently transport water to the top, which is the basis for efficient current generation. This biomimetic prGO is scalable, providing an avenue for assembling other low-dimensional carbon materials into high current output HEGs. 

Can Bo Feng

Papers

A novel model for prediction of burst capacity of corroded pipelines subjected to combined loads of bending moment and axial compression

Temperature Measurement and Simulation in Stainless Steel High-Speed Grinding

Biomimetic Aerogel with Aligned Porous Structures from Ice Templating for Water Evaporation‐Induced Electricity Generation

Boosted energy harvesting in droplet electrochemical cell with non-equilibrium electrical double layer