Failure analysis of two cylindrical impact pistons subjected to high velocity impacts in drilling applications

Bakhshandi, Reza Karimi; Tkachuk, Anton; Sadek, Mohamed; Bergström, Jens; Grehk, Mikael

doi:10.1016/j.engfailanal.2022.106623

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…Formation of crater shows that the given tool material is subjected mechanical fatigue failure. Similar failure pattern was observed by other researchers too [17]. Presence of blue colour near to the cutting edge speaks about the process of formation of pimples [18] The size of the crater is 75 microns ( g: 2).…”

Section: Resultssupporting

confidence: 80%

Investigating the Impact of Monolayer and Multilayer PVD Coatings on Cutting Tool Friction Factor

Paulian,

Manickam,

Tharanipathy

2024

Preprint

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The purpose of the paper is to examine the ZrSiN, monolayer TiN, and multilayer TiSiN PVD coatings' friction factors on tempered steel 45X (50 HRC) and steel 45 (180 HB). The tribological characteristics were studied using tribometer. The registered values of friction factor were transferred to the computer using an analog to digital converter. TiN coatings on both steel 45 (180 HB) and the tempered steel 45Х (50 HRC) shows an increase in friction factor. Friction factor of TiSiN coating at 70V and 150 V also increases with time. In case of ZrSiN, the friction factor remains constant for both the tool materials for deposition current of 150V.The results of the investigations provide useful information for applying ZrSiN PVD coating for the improvement of tool life of cutting tools. The paper contributes to better understanding of the friction properties of monolayer TiN, multilayer TiSiN, and ZrSiN PVD coatings deposited on steel 45 (180 HB) and the tempered steel 45Х (50 HRC).

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Section: Resultssupporting

confidence: 80%

Investigating the Impact of Monolayer and Multilayer PVD Coatings on Cutting Tool Friction Factor

Paulian,

Manickam,

Tharanipathy

2024

Preprint

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Cyclic Impact Test with the Hopkinson Bar: Application to Granite

Isakov

2023

J. dynamic behavior mater.

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A laboratory scale cyclic impact loading test was developed by modifying a Hopkinson Bar test setup. The modifications involve placing a special shank piece between the striker and the rest of the setup. The shank transmits the impact loading and enables the use of compressed air for rapid reloading of the striker. The short shank is in direct contact with the specimen, i.e., there is no long input bar. With this configuration residual wave motion and reloading of the specimen is avoided. Behind the striker an output bar and momentum trap bar are placed for specimen loading measurement and removal of the wave motion in the system, respectively. The trap bar is stopped by a pneumatic actuator, which also resets the bars and the specimen before the next impact loading. The compressed air flow driving the striker is controlled by high-speed electropneumatic valves connected to a control unit and operated in simple open-loop control. Numerical simulations of both the striker motion by compressed air and dynamic loading wave propagation during impact were used in the design phase as well as setting up the test parameters. The test setup is able to produce stable cyclic impact loading at a frequency of up to 10 impacts per second with striker velocity up to 9 m/s. The feasibility of the test method is demonstrated by providing data from cyclic Brazilian disc experiments on Balmoral Red granite at both impact and quasi-static cyclic loading.

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Experiment study and numerical simulation on the dynamic rock-breaking process of rotary percussive drilling with different cyclic and stress-wave frequencies

Yao

Zha

et al. 2023

Petroleum Science and Technology

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Failure analysis of two cylindrical impact pistons subjected to high velocity impacts in drilling applications

Cited by 4 publications

References 26 publications

Investigating the Impact of Monolayer and Multilayer PVD Coatings on Cutting Tool Friction Factor

Investigating the Impact of Monolayer and Multilayer PVD Coatings on Cutting Tool Friction Factor

Cyclic Impact Test with the Hopkinson Bar: Application to Granite

Experiment study and numerical simulation on the dynamic rock-breaking process of rotary percussive drilling with different cyclic and stress-wave frequencies

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