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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29 , No. 4

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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 4, pp. 288-295
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Aug 2020
Received 26 Mar 2020 Revised 20 May 2020 Accepted 26 May 2020
DOI: https://doi.org/10.7735/ksmte.2020.29.4.288
레이저 쇼크 패터닝을 통한 표면 텍스처링이 알루미늄과 강 접촉면의 마찰특성에 미치는 영향
이성구^a^{, ^†} ; 송경욱^a^{, ^†} ; 최대철^b ; 노종현^a ; 김홍석^a^{, *}


Laser Shock Surface Patterning of Steel and Aluminum Contact Surfaces and its Effect on Tribological Properties
Sung Goo Lee^a^{, ^†} ; Kyeong Uk Song^a^{, ^†} ; Dae Cheol Choi^b ; Jong Hyun Noh^a ; Hong Seok Kim^a^{, *}
aDepartment of Mechanical and Automotive Engineering, Seoul National University of Science and Technology
bDepartment of Mechanical Engineering, Graduate School of Seoul National University of Science and Technology
Correspondence to : ^*Tel.: +82-2-970-6333 E-mail address: hongseok@seoultech.ac.kr (Hong Seok Kim). ^† These authors contributed equally to this work and are joint first authors.



Funding Information ▼ Seoul National University of Science and Technology

Abstract

In this study, a laser shock surface patterning process was applied to effectively transfer a micro-pattern array to an aluminum specimen. The effect of surface texturing on the tribological properties of aluminum and steel contact surfaces was investigated. In dry conditions, the friction coefficient of the contact surface could be significantly reduced through surface texturing. However, as the contact load increased, the amount of wear debris collected in the cavity became too large, and the influence of the micro-pattern on the frictional force decreased. In lubricated conditions, surface texturing significantly reduced the average friction coefficient and its variation. The effect of surface texturing became prominent in high contact load conditions due to the increase in hydrodynamic effects. Further studies considering the pattern geometry, loading conditions, and properties of the lubricant are needed to quantitatively model the coefficient of friction.


Keywords: Surface texturing, Laser shock patterning, Micro-pattern array, Friction, Aluminum alloy

Acknowledgments

이 연구는 서울과학기술대학교 교내 학술연구비 지원으로 수행되었습니다.

References


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Sung Goo Lee

B.Sc. student in the Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology.His research interest is laser applications and tribology.

E-mail: lklk2091@gmail.com

Kyeong Uk Song

B.Sc. student in the Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology.His research interest is laser applications and tribology.

E-mail: yoog96@naver.com

Dae Cheol Choi

Ph.D. candidate in the Department of Mechanical Engineering, Seoul National University of Science and Technology.His research interest includes laser shock surface pattering and nanomaterials.

E-mail: cdc4662@seoultech.ac.kr

Jong Hyun Noh

B.Sc. student in the Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology.His research interest is laser applications and tribology.

E-mail: shwhdgus223@naver.com

Hong Seok Kim

Professor in the Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology.His research interest includes laser surface texturing, nanomaterials, and micro/nanoscale manufacturing.

E-mail: hongseok@seoultech.ac.kr