On the diffusion wear of cemented carbides in the turning of AISI 316L stainless steel

Saketi, Sara; Bexell, Ulf; Östby, Jonas; Olsson, Mikael

doi:10.1016/j.wear.2019.05.010

Cited by 17 publications

(5 citation statements)

References 23 publications

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“…It is therefore expected that for a given volume of the chip/workpiece adjacent to the interface with the tool, significantly less tool atoms dissolve and possibly diffuse into the superalloy in the cutting zone as compared with the diffusion couple tests. In a recent study, Saketi et al [33] have applied the surface sensitive technique of time of flight secondary ion mass spectrometry to study the backside of stainless steel chips produced by turning using an uncoated cemented tungsten carbide tool. Their results show the presence of tungsten only in the range of a few tens of nanometers from the surface of the chip.…”

Section: Discussionmentioning

confidence: 99%

Tool wear by dissolution during machining of alloy 718 and Waspaloy: a comparative study using diffusion couples

Hoier

Surreddi

Klement

2019

Int J Adv Manuf Technol

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The wear of metal cutting tools is known to take place by the combined and simultaneous effects of several wear mechanisms. Knowledge of the relative contribution of the individual wear mechanisms is required to understand and predict the tool wear during cutting different workpiece materials and alloys. It has been shown previously that machining two heat resistant superalloys, alloy 718 and Waspaloy, leads to distinctively different tool wears. Even though the subject has been addressed in various studies, there are still open questions regarding the underlying reasons for the differing tool wear rates. In particular, the relative contributions of diffusion/dissolution when machining the two alloys have not been addressed so far. Therefore, a qualitative comparison of the chemical interaction between the tool material and the two superalloys was made by using diffusion couple tests. The aim was to mimic the high temperatures and intimate contact between workpiece and tool material at the tool rake and flank faces during cutting under controlled and static conditions. The obtained results suggest that it is unlikely that differences in flank wear rate when machining the two superalloys are caused by significantly varying magnitudes of tool atoms dissolving into the respective workpiece. Analysis of the tool/superalloy interfaces in the diffusion couples revealed diffusion-affected zones of similar size for both tested superalloys. Increasing test temperature led to enhanced interdiffusion which suggests an increase in tool wear by diffusion/dissolution for higher cutting temperature. For alloy 718, the higher test temperature also led to depletion of carbon together with formation of tungsten within the tool in close vicinity to the interface with the superalloy.

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Section: Discussionmentioning

confidence: 99%

Tool wear by dissolution during machining of alloy 718 and Waspaloy: a comparative study using diffusion couples

Hoier

Surreddi

Klement

2019

Int J Adv Manuf Technol

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“…[20][21][22] Scanning electron microscope (SEM) and energy dispersion spectrum (EDS) are usually conducted to analyze the micrograph of worn area. [23][24][25] For free-cutting steels, wear behavior and tool life can also be investigated using SEM and EDS analysis of worn out inserts. 26 However, these studies on the tool wear of machining free-cutting steels mainly focused on the lubricant layer on the rake face and inclusion forms in steel.…”

Section: Introductionmentioning

confidence: 99%

“…20–22 Scanning electron microscope (SEM) and energy dispersion spectrum (EDS) are usually conducted to analyze the micrograph of worn area. 23–25 For free-cutting steels, wear behavior and tool life can also be investigated using SEM and EDS analysis of worn out inserts. 26…”

Section: Introductionmentioning

confidence: 99%

Study on the tool life analysis for free-cutting steels

Zhang

Yang

Tang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Experimental study and theoretical calculation on the tool lives of free-cutting steels with different additions were carried out in terms of the friction characteristics, chip deformation, and normal stress distribution. The average friction coefficient, shear angle, and maximum normal stress were then calculated, and the influence of them on tool life was analyzed and discussed carefully. The free-cutting steel with Bi addition (MB) presented the best tool life of about 9200 and 5200 s at the speed of 150 and 200 m/min, respectively, which was mainly due to the combined effect of the lower average friction coefficient, maximum normal stress, and higher shear angle. When the cutting speed increased to 300 m/min, the tool life decreased rapidly, which was mainly caused by the serious tool wear behavior dominated by the high cutting temperature. Differing from the calculated results of shear angles based on Lee and Shaffer’s assumption, the measured shear angles decreased with the cutting speed ranging from 150 to 250 m/min, resulting from the thermal softening of workpiece material during machining. Moreover, the present findings indicated that the cutting process became unstable when the maximum normal stress on the tool nose was larger than 2 GPa, where catastrophic failures occurred, resulting in accelerated fracture of the tool. The research findings not only give more insight into the effect of friction characteristics, chip deformation, and normal stress distribution on the tool lives, but also have significance for the machining of free-cutting steels.

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“…This is the motivation of the research paper. Single crystal diamond and polycrystalline diamond tools have been experimentally observed to undergo different wear mechanisms, such as diffusion wear [21], thermo-chemical wear [22],…”

Section: Introductionmentioning

confidence: 99%

An atomistic investigation on the wear of diamond during atomic force microscope tip-based nanomachining of gallium arsenide

Fan

Goel

Luo

et al. 2021

Computational Materials Science

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This paper investigated the wear mechanism of diamond during the atomic force 2 microscope (AFM) tip-based nanomachining of Gallium Arsenide (GaAs) using molecular dynamics (MD) simulations. The elastic-plastic deformation at the apex of the diamond tip was observed during the simulations. Meanwhile, a transition of the diamond tip from its initial cubic diamond lattice structure sp 3 hybridization to graphite lattice structure sp 2 hybridization was revealed. Graphitization was, therefore, found to be the dominant wear mechanism of the diamond tip during the nanometric cutting of single crystal gallium arsenide for the first time. The various stress states, such as hydrostatic stress, shear stress, and von Mises stress within the diamond tip and the temperature distribution of the diamond tip were also estimated to find out the underlying mechanism of graphitization. The results showed that the cutting heat during nanomachining of GaAs would mainly lead to the graphitization of the diamond tip instead of the high shear stress-induced transformation of the diamond to graphite. The paper also proposed a new approach to quality the graphitization conversion rate of diamond tip.

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On the diffusion wear of cemented carbides in the turning of AISI 316L stainless steel

Cited by 17 publications

References 23 publications

Tool wear by dissolution during machining of alloy 718 and Waspaloy: a comparative study using diffusion couples

Tool wear by dissolution during machining of alloy 718 and Waspaloy: a comparative study using diffusion couples

Study on the tool life analysis for free-cutting steels

An atomistic investigation on the wear of diamond during atomic force microscope tip-based nanomachining of gallium arsenide

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