Effect Of Milling Parameters Research Articles

Effect of milling parameters on chip shape and chip morphology for Zr-based bulk metallic glass by using micro-groove milling

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.

Effect of Milling Parameters on the Dehydrogenation Properties of the Mg−Ti−H System

Magnesium-based alloys are promising candidates as potential hydrogen storage materials due to their inherent high hydrogen contents. Small particle size which can be achieved by milling and small amounts of transition-metal compounds as catalysts result in increased hydrogen release/uptake kinetics. In this work, we examined the effects of various milling parameters and TiH2 content on the dehydrogenation properties of the Mg−Ti−H system. The samples were prepared with different amounts of TiH2 using various milling methods and conditions. The activation energy and the enthalpy change of dehydrogenation of the milled samples were determined by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The results indicated that, among a variety of MgH2/TiH2 ratios and milling conditions, samples with 9.1 mol % TiH2 milled in a dual-planetary high energy mill for 4 h under 15 MPa hydrogen pressure were found to be the optimal materials, displaying a substantially reduced activation energy a...

Effect of Milling Parameters on Formation of Al-Cr-Zr Powders

Effect of Milling Parameters on Formation of Al-Cr-Zr Powders