Search

The nano-cutting process of metallic glass (Zr52Cu20Ni16Ni12) processed at room temperature was studied by molecular dynamics simulation in this paper. At different cutting speeds, the microstructure of metallic glass, cutting force, strain morphology of cutting zone, temperature change of cutting zone and its influence on the quality of machined surface were analyzed. The simulation results show that the cutting speed has little effect on the content of Voronoi polyhedron in the cutting area of metallic glass. The cutting force increases significantly with the increase of cutting speed. The shape of strain deformation in the cutting zone of metallic glass material is significantly affected by the cutting speed, and the influence depth of strain is deepened with the increase of cutting speed. The increase of cutting speed has a significant effect on the temperature of the cutting zone of metallic glass, and the temperature of atoms in the cutting zone increases rapidly. The cutting speed has a significant impact on the surface quality of metal glass cutting. The surface quality of metal glass cutting becomes worse with the increase of cutting speed. In particular, the initial stage of plastic deformation in metal glass cutting process is simulated and analyzed, and the formation and evolution of its shear band and free volume are simulated and studied. [ABSTRACT FROM AUTHOR]

Zr-based bulk metallic glass is an amorphous alloy. In order to study the burr problem in the groove milling process of Zr-based bulk metallic glass, the milling force in the process is studied experimentally. Then the effect of milling parameters on the burr of Zr-based bulk metallic glass was studied, and the relationship between milling force and burr was analyzed. In order to further study the milling burr of amorphous alloy, under the same test parameters, the single crystal alloy material (nickel base single crystal superalloy DD5) and the traditional polycrystalline metal material (304 stainless steel) were selected for comparative test and analysis. The results show that Zr-based bulk metallic glass has good groove milling machinability. The test results provide some experimental basis for groove milling of Zr-based bulk metallic glass. [ABSTRACT FROM AUTHOR]

In order to study the milling machinability of Zr-based bulk metallic glass, a comparative experimental study on the surface roughness of the milling groove bottom surface for Zr-based bulk metallic glass was carried out in this paper. Through different processing materials, milling tools with different coatings, milling tools with different geometric parameters, and different processing conditions, a large number of comparative tests were carried out on the surface roughness of the milling groove bottom surface for Zr-based bulk metallic glass. The surface roughness values of the milling groove bottom surface are compared, studied, and analyzed from many angles (surface roughness Sa, Sq, Sz, Ssk, and Sku). The test results show that Zr-based bulk metallic glass has good milling machinability. It can obtain a low surface roughness value through the processing conditions and methods used in the test. The research content of this paper provides experimental basis for groove milling of Zr-based bulk metallic glass. At the same time, it also provides a strong test basis for the manufacture of Zr-based bulk metallic glass parts. [ABSTRACT FROM AUTHOR]

The effect of milling parameters on chip shape and chip morphology for Zr-based bulk metallic glass was studied in this paper. The milling groove experiments of Zr-based bulk metallic glass (Zr-based BMG) (Zr52Cu17.5Ti16Ni12Nb2.5) were conducted by using a JX-1A ultra-precision machine tool. In order to study the milling quality and milling characteristics of Zr-based bulk metallic glass, it is very important to study the chip shape and chip morphology. In this paper, firstly, the temperature field distribution of Zr-based bulk metallic glass in milling process was simulated by finite element method, and the milling temperature and its distribution at different cutting speeds were obtained. Then the effect of different milling parameters on chip shape and chip morphology was studied, and the reason of the change was analyzed. Then the influence of milling cutters with different geometric parameters on the chip shape and chip morphology of Zr-based bulk metallic glass was also studied. At last, under the same milling conditions, the chip shape and chip morphology of traditional polycrystalline metal materials, monocrystalline metal alloy materials, high-entropy alloy which is in amorphous system, and Zr-based bulk metallic glass were compared. It provides theoretical and experimental basis for the groove milling technology of Zr-based bulk metallic glass. [ABSTRACT FROM AUTHOR]

The milling groove experiments of Zr-based bulk metallic glass (Zr-based BMG) (Zr52Cu17.5Ti16Ni12Nb2.5) are conducted by using an ultra-precision lathe. In order to study the milling groove flank contour accuracy in mesoscale groove milling for Zr-based bulk metallic glass component, the milling force and the flank contour shape were investigated by single-factor experiment. The effect of milling process parameters of Zr-based bulk metallic glass materials on the milling force and the flank contour profile of milling groove were obtained, and the relationship between flank contour profile of milling groove and milling force was also obtained. The flank contour profile of milling groove for Zr-based bulk metallic glass is analyzed theoretically. The effect of milling experimental parameters on the deviation between the actual flank contour profile of milling groove and the theoretical flank contour profile of milling groove is analyzed and summarized through the experiment. [ABSTRACT FROM AUTHOR]