Research on surface integrity of grinding Inconel718

Surface integrity of 2304 duplex stainless steel after different grinding operations

“…Heat was proposed to be the main factor to generate tensile residual stress on the broaching surface of Inconel 718 by Chen et al (2014). Grinding has been reported to produce tensile residual stresses on the surface for different metals, including austenitic stainless steel (Turnbull et al, 2011), Inconel 718 (Yao et al, 2013), Ti-6Al-4 V (Guo et al, 2010). Verneau and Mecozzi (1998) showed that the presence of tensile stresses on the stainless steel surface is detrimental for the pitting corrosion resistance.…”

“…Previous studies have shown that the introduction of deformation into the workpiece material by grinding is governed by two main factors, the metal removal process and the rubbing contact at the interface of the grinding grit tops and the workpiece surface (Turley and Doyle, 1975;Sedriks and Mulhearn, 1963). The metal removal process in abrasive machining operates by either chip forming or ploughing, and has been demonstrated to be dependent on the workpiece material (Jiang et al, 1996), grit size (Rabinowicz and Mutis, 1965), rake angle (Turley and Doyle, 1975), grit shape (Morre and Swanson, 1983), grit material (Yao et al, 2013) and lubrication (Manimaran et al, 2014). Moreover, Turley (1968) has shown that the chip forming process induces a thinner deformed surface layer than does ploughing.…”

Review on grinding-induced residual stresses in metallic materials

“…Additionally, the hardness of CBN abrasives (Knoop: about 4500 kg/cm 2 ) is almost twice that of alumina abrasives (Knoop: about 2260 kg/cm 2 ), that is, a CBN wheel has greater wear resistance [72]; therefore, the service life of CBN wheels is prolonged greatly than that of alumina wheels, which has been verified during grinding Aermet100 steel and Inconel718 nickel-based superalloy [84,85]. In some cases [1,[86][87][88], it is also found that the alumina wheels are suited merely for grinding at wheel speeds lower than 120 m/s, beyond which the CBN wheels should be applied.…”

Performance evaluation of grinding wheels impregnated with graphene nanoplatelets

“…of the ground component [1]. This phenomenon is more prominent in 'difficult-to-machine materials' like titanium alloys and nickel-based alloys [2]. Inconel 718 is the most widely used nickel-based super alloy used in aerospace and high-temperature applications due to its high hot strength, endurance limit and corrosion resistance.…”

“…The most commonly adapted technique for controlling temperatures and cutting forces is flooding the contact zone with cutting fluids. However, this strategy has certain limitations such as the following: (1) Air barrier restricts the accessibility of the cutting fluid into the grinding zone [4]; (2) even if a small quantity reaches the grinding zone, film boiling occurs, which further enhances the heat generated at the work piece-wheel interface [5]; and (3) degradation of lubricity of the cutting fluid happens when the interface temperature reaches a certain limit [6]. Moreover, most of the cutting fluids are hazardous to health [7], difficult to dispose and significantly increase the manufacturing cost [4].…”