Nickel-based superalloy Inconel 718 is widely used for aeronautical applications, such as blades and discs of aircraft engines, and therefore is generally submitted to a grinding process in order to meet the required surface finish and dimensional accuracy. However, the mechanical and thermal properties of Inconel 718 make it a material with low machinability (difficult-to-machine material). Therefore, the proper selection of abrasives is of high importance, when aiming to improve process efficiency. White aluminum oxide (WA) and green silicon carbide (GC) abrasives are the most common conventional abrasives employed in the grinding of nickel-based superalloys, and their different properties can be decisive when it comes to the success of the process. In this sense, this work sought to evaluate the performance of two conventional abrasives (WA and GC) in the grinding of Inconel 718 with cutting fluid applied with a conventional technique. Five different cutting conditions were tested. Surface finish (Ra and Rz parameters) and cutting region temperature were used to assess grinding performance. The results showed that, compared to WA, grinding with the GC wheel reduced roughness in 14% and 19% for Ra and Rz, respectively, even though this produced higher cutting region temperatures (55% higher in general). However, for more severe cutting conditions (e.g., higher values of radial depth of cut), the characteristic wear mechanism of the GC wheel further increases cutting region temperature, resulting in surface finish deterioration.

镍基超合金Inconel 718被广泛用于航空应用，例如飞机发动机的叶片和盘，因此，为了满足所需的表面光洁度和尺寸精度，通常对其进行磨削加工。但是，Inconel 718的机械和热性能使其成为具有低切削性的材料（难加工材料）。因此，当旨在提高工艺效率时，正确选择磨料非常重要。白色氧化铝（WA）和绿色碳化硅（GC）磨料是用于研磨镍基高温合金的最常用的常规磨料，它们的不同性能对于该工艺的成功至关重要。在这个意义上，这项工作旨在评估两种传统的磨料（WA和GC）在用常规技术施加切削液对Inconel 718进行研磨时的性能。测试了五种不同的切割条件。使用表面光洁度（Ra和Rz参数）和切削区域温度来评估研磨性能。结果表明，与WA相比，使用GC砂轮磨削的Ra和Rz的粗糙度分别降低了14％和19％，尽管这会产生更高的切削区域温度（通常高出55％）。但是，对于更苛刻的切削条件（例如，较高的径向切削深度值），GC轮的特征磨损机制会进一步提高切削区域的温度，从而导致表面光洁度下降。