“…When a liquid droplet falls on the solid surface with a temperature much higher than the boiling point, a thin vapor layer forms at the contact interface, which keeps the droplet suspended and slowly evaporate, known as the Leidenfrost effect. − It is worth noting that the Leidenfrost effect widely exists in the heat dissipation process of high heat flow density parts, including the cooling of electronic devices, , the combustion of liquid fuels, , and the spray quenching, , which obviously affect the heat transfer and dissipation efficiency. Especially in the process of metal cutting, due to the severe friction between the tool and workpiece, a large amount of heat is generated, so a cutting fluid is employed to take the heat away and improve the machining performance. , However, it should be noted that the Leidenfrost effect of cutting fluid at the machining area is inevitable, which makes the cutting fluid boil in a film regime and largely decreases the heat transfer efficiency, , thus inducing a decline in the quality of the machined surface, waste of cutting fluid, and even environmental pollution. Herein, it is of great importance to explore and suppress the Leidenfrost phenomenon of cutting fluid at the interface during the metal cutting process. − …”