Wang, J, Han, B, Wang, C orcid.org/0000-0002-4301-3974 et al. (4 more authors) (2021) Failure analysis of the piston used in a pneumatic down the hole impactor. Engineering Failure Analysis, 127. 105561. ISSN 1350-6307
Abstract
In this study, the piston's failure mechanism in the pneumatic down the hole(DTH) impactor has been investigated. Failed piston microstructure and hardness have been analysed using the SEM, nanoindentation and the Vickers hardness tester. The stress state of the piston during the impact process was studied using ABAQUS finite element software. The results show that the carburized layer transits from the acicular martensite phase to plate martensite from the surface towards the inside. According to finite element simulation results, the maximum Mises stress occurs when the piston strikes the bit at an angle of 0.22°, causing the carbide phase to crack. In addition, the stress at the piston's impact point propagates to generate tensile stress of 560 MPa on the piston's outer edge, causing the crack in carbide to grow along the radial and axial direction of the piston.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2021 Elsevier Ltd. All rights reserved. This is an author produced version of an article published in Engineering Failure Analysis. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Fatigue fracture; Carburizing layer; Cracks; DTH impactor |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Functional Surfaces (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Aug 2021 09:24 |
Last Modified: | 24 Jun 2022 00:14 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.engfailanal.2021.105561 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:177444 |