Material aspects of chip formation in HSC machining

Schulz, Herbert; Abele, Eberhard; Sahm, Alexander

doi:10.1016/s0007-8506(07)62067-8

Cited by 85 publications

(41 citation statements)

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“…Generally, the parameters that characterize chip morphologies are the segment spacing (shear band spacing) L c and the shear band width δ illustrated in Fig. 2 (Molinari et al, 2002;Schulz et al, 2001). Fig.…”

Section: Experimental Observationsmentioning

confidence: 99%

Suppression of repeated adiabatic shear banding by dynamic large strain extrusion machining

Cai

Dai

2014

Journal of the Mechanics and Physics of Solids

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Section: Experimental Observationsmentioning

confidence: 99%

Suppression of repeated adiabatic shear banding by dynamic large strain extrusion machining

Cai

Dai

2014

Journal of the Mechanics and Physics of Solids

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“…2 Serrated chip caused by ASB, which affects the surface quality and tool wear and causes a high frequency change of cutting force, 3 often occurs in the process of high speed cutting. [4][5][6][7][8] But ASB is favorable for chip breaking. The adiabatic shear failure characteristics can cause the "self-sharpening" phenomenon on the head of the armor-piercing projectile to improve the penetration ability.…”

Section: Introductionmentioning

confidence: 99%

Research on adiabatic shear failure character of pure copper and aluminum bronze based on empirical electron theory

Zhang

et al. 2017

AIP Advances

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The valence electron structure (VES) parameters affecting adiabatic shearing failure under high speed impact load using split Hopkinson pressure bar (SHPB) were studied by empirical electron theory (EET) of solids and molecules. There is a problem of multiple solutions about VES parameters in EET. The statistics values of VES parameters related to adiabatic shearing sensitivity were calculated to substitute for the most probable value among the multiple solutions according to the view that the microstate statistics values can reflect the macro physical quantity. The research shows that the adiabatic shearing sensitivity is growing with the rise of the statistics value of bond energy of the strongest covalent bond, and is decreasing with the rise of the statistics value of the lattice electron number. The statistics value of bond energy of the strongest covalent bond in aluminum bronze (QAl9-4) is larger than that in pure copper, and the statistics value of the lattice electron number in QAl9-4 is smaller than that in pure copper. Therefore, QAl9-4 is prone to adiabatic shearing failure, and the grains were only elongated due to the large deformation for pure copper without any adiabatic shear band (ASB). It is of great significance for the selection and design of material with different adiabatic shearing sensitivity to research the effect of alloy elements on adiabatic shearing sensitivity from the electronic structure perspective.

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“…These materials include hardened steel, Ni-Fe super alloy, nickel-based alloy, titanium alloy, and so on [4][5][6][7][8][9][10][11][12][13]. The serrated chip will affect the surface quality and tool wear and cause a high-frequency change of cutting force [14].…”

Section: Introductionmentioning

confidence: 99%

Study on chip failure mechanism in high-speed cutting process with electronic theory

Zhang

Guo

et al. 2015

Int J Adv Manuf Technol

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In this paper, the microscopic mechanism of 080A15 and 30CrMnMo steel chip failure modes has been studied at the level of valence electron structure (VES) based on the empirical electron theory (EET) of solids and molecules. Studies show the bonding ability and the lattice electron density are related to the chip failure form. If the bonding ability is weak and the lattice electron density is high, the chip is more prone to ductile fracture. Conversely, the chip is more prone to adiabatic shear failure to form the serrated chip divided uniformly by adiabatic shear bands (ASBs). For 080A15 steel, the bonding force between atoms is weak, and the lattice electron density is very high. It is difficult to produce the thermal-mechanical instability. Thus, the chip was formed by ductile fracture. For 30CrMnMo steel, the total bonding ability of each structural unit of carbon and alloy elements is stronger, and the lattice electron density of each structural unit is weaker, the temperature can rise instantaneously to a very high level to form the serrated chip with the adiabatic shear failure. The results of this research provide useful insights on material design and selection in high-speed cutting by studying the specific alloy elements on the influence of chip failure mechanism at the VES level.

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Material aspects of chip formation in HSC machining

Cited by 85 publications

References 0 publications

Suppression of repeated adiabatic shear banding by dynamic large strain extrusion machining

Suppression of repeated adiabatic shear banding by dynamic large strain extrusion machining

Research on adiabatic shear failure character of pure copper and aluminum bronze based on empirical electron theory

Study on chip failure mechanism in high-speed cutting process with electronic theory

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