Friction and Wear characteristics of CF/PEEK against 431 stainless steel under high hydrostatic pressure water lubrication

Ziwei Guan; Defa Wu; Qian Cheng; Zhenyao Wang; Meilihua Tang; Yinshui Liu

Materials & Design (Nov 2020)

Friction and Wear characteristics of CF/PEEK against 431 stainless steel under high hydrostatic pressure water lubrication

Ziwei Guan,
Defa Wu,
Qian Cheng,
Zhenyao Wang,
Meilihua Tang,
Yinshui Liu

Affiliations

Ziwei Guan: State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China; School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
Defa Wu: State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China; School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Corresponding author.
Qian Cheng: State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China; School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
Zhenyao Wang: State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China; School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
Meilihua Tang: State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China; School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
Yinshui Liu: State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China; School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China

Journal volume & issue: Vol. 196
p. 109057

Abstract

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The influence of high hydrostatic pressure on tribological characteristics of carbon fiber reinforced Poly-ether-ether-ketone (CF/PEEK) against 431 stainless steel (431SS) was investigated. Hydrostatic pressure ranged from normal pressure to 80 MPa at a step of 20 MPa to simulate the environmental pressure of the deep ocean. The results suggest that the average friction coefficient decreases with increased hydrostatic pressure. Hydrostatic pressure helps reduce the wear rates of CF/PEEK and 431SS. As the pressure increases, the main wear and friction mechanism of CF/PEEK changes from adhesive wear to fatigue wear, while the main wear mechanism of 431SS is abrasive wear. Compared with the sliding surface after normal pressure experiments, the surface roughness Ra of CF/PEEK will be smaller after high pressure experiments. The crystallinity of CF/PEEK decreases linearly with hydrostatic pressure, indicating a possible decline in mechanical properties. Moreover, comprehensive results suggest that this friction pair can be used under the hydrostatic pressure up to 80 MPa.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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