Molecular dynamics simulation of the diffusion behaviour between Co and Ti and its effect on the wear of WC/Co tools when titanium alloy is machined

Bai, Dashan; Sun, Jianfei; Chen, Wuyi; Du, Daxi

doi:10.1016/j.ceramint.2016.08.103

Cited by 34 publications

(11 citation statements)

References 17 publications

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“…Lu et al investigated the diffusion behaviors of hydrogen atoms in body-centered cubic (BCC) Fe containing point defects [ 14 ]. Bai et al investigated the diffusion behaviors of the interface between the tool and the chip during machining titanium alloy [ 15 ]. Song et al studied the atomic diffusion behaviors in linear friction welding between Ti and Ti–Al alloy [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Atomistic Investigation on Diffusion Welding between Stainless Steel and Pure Ni Based on Molecular Dynamics Simulation

Zhang

Jiang

2018

Materials

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Based on molecular dynamics (MD) simulation, the behaviors and mechanisms of diffusion welding between 304 stainless steel (304 SS) and pure Ni were investigated in the present study. The results show that surface roughness has a significant influence on the diffusion behaviors of atoms during diffusion welding between two different materials, and it is suggested that the rough surface should be set on the pure Ni rather than the 304 SS during the diffusion welding between them. Temperature plays an important role in the interface diffusion. With the increase of temperature, the number of atoms diffusing into the opposite side increases and the diffusion distances increase as well. As a consequence, the diffusion welding should be performed at a suitably elevated temperature. The influence of vertical pressure on the diffusion bonding between the two materials includes two aspects. One is to increase the contact area via deforming the asperities or grooves at the interface, which provides more opportunities for the diffusion between the two materials. The other is to reduce the mobility of atoms within a lattice. As a consequence, the pressure effect is smaller than temperature effect during diffusion welding between 304 SS and pure Ni.

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Section: Introductionmentioning

confidence: 99%

Atomistic Investigation on Diffusion Welding between Stainless Steel and Pure Ni Based on Molecular Dynamics Simulation

Zhang

Jiang

2018

Materials

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“…The scattered WC particles as well as the Co detected in chip adhesion, as shown in Fig. 15, indicate the diffusion of Co. As the Co diffused to the chip adhesion, the holding to the WC particles is weakened [15,[30][31][32], so the loosened WC particles can be dropped out easily by the chip flow. The semi-carter was possibly formed by the diffusion of carbide and the erosion of chip flow.…”

Section: Tool Wearmentioning

confidence: 95%

Investigation on the Machinability of Metastable β Titanium Alloy M28

Jiang¹,

Tian²,

Yin³

et al. 2021

Preprint

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Oriented to the application of new generation strategic aircraft, M28 (Ti-4Al-5Mo-5V-6Cr-1Nb) is a novel metastable β titanium alloy with outstanding strength. A better understanding of its machinability is the cornerstone of the manufacture. In this work, milling experiments were made with the uncoated WC-Co carbide insert to investigate its machinability. Compared with milling Ti-6Al-4V, the cutting force is much higher and the tool life is considerably shorter in the milling of M28, especially in the high-speed cutting. Serious edge breaking is found at normal cutting speed. While a continuous band of flank wear with significant chip adhesion, which covers comb cracks in the cutting edge, is found in the high-speed cutting tool. The machinability of M28 is considerably poorer than that of Ti-6Al-4V. The hard-to-machine performance of M28 is considered to be subject to the material property of the metastable β titanium alloy as well as the competing mechanism among work hardening, strain rate hardening and the thermal softening in the cutting. According to the detection of the scanning electron microscope (SEM) and the energy dispersive spectrometer (EDS), the diffusion of C and Co generates a negative influence on the cutting edge and accelerates the tool wear.

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“…In high-speed end-milling Ti6Al4V with uncoated cemented tungsten carbide inserts, Zhang et al [7] stated that adhesion and diffusion were the predominant tool wear mechanisms in milling Ti6Al4V. Many studies indicated that the high temperature generated on the rake face caused co element diffusion from tool to workpiece, weakening the tool and accelerating crater wear [8][9][10][11][12]. To further study tool wear, some efforts have been devoted based on analytical models and the finite element method (FEM).…”

Section: Introductionmentioning

confidence: 99%

Crater wear prediction in turning Ti6Al4V considering cutting temperature effect

Zhuang

Lin³

et al. 2022

Int J Adv Manuf Technol

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Tool wear has great impacts on tool life and cutting parameter selection in the machining process. As ceramic inserts are widely employed in efficient machining, it is of great significance to predict accurately the wear of ceramic tools. Crater wear is one of the most significant tool wear modes when turning difficult-to-cut materials at high speeds. The purpose of this research is to demonstrate the forming and influence mechanisms of crater wear in Ti6Al4V turning with ceramic inserts while considering cutting temperature at the tool-chip interface. An effort is made to describe quantitatively the appearance of crater wear from the perspective of temperature distribution based on crater wear experiments under various cutting conditions. In order to obtain the cutting temperature distribution efficiently, an analytical temperature prediction model is used in this paper. Then a prediction model for crater wear depth and width considering the influence of the maximum temperature is developed. The maximum crater wear depth and width models are validated by a series of cutting experiments, and the outcomes prove that the proposed models are practical.Additionally, the influence of various cutting parameters on crater wear is discussed.The cutting speed has the greatest impact on crater wear, followed by the feed rate.Furthermore, this research can be used to improve cutting parameters for controlling crater wear.

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Molecular dynamics simulation of the diffusion behaviour between Co and Ti and its effect on the wear of WC/Co tools when titanium alloy is machined

Cited by 34 publications

References 17 publications

Atomistic Investigation on Diffusion Welding between Stainless Steel and Pure Ni Based on Molecular Dynamics Simulation

Atomistic Investigation on Diffusion Welding between Stainless Steel and Pure Ni Based on Molecular Dynamics Simulation

Investigation on the Machinability of Metastable β Titanium Alloy M28

Crater wear prediction in turning Ti6Al4V considering cutting temperature effect

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