Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact

Fang, Zhihao; Chen, Jiao; He, Weifeng; Yang, Zhufang; Yuan, Zhanwei; Geng, Mingrui; He, Guangyu

doi:10.3390/coatings9110765

Open AccessArticle

Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact

by

Zhihao Fang

¹,

Jiao Chen

²,

Weifeng He

^1,*

,

Zhufang Yang

¹,

Zhanwei Yuan

³

,

Mingrui Geng

¹ and

Guangyu He

^1,*

¹

Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, China

²

State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China

³

School of materials Science and Engineering, Chang’an University, Xi’an 710061, China

^*

Authors to whom correspondence should be addressed.

Coatings 2019, 9(11), 765; https://doi.org/10.3390/coatings9110765

Submission received: 15 October 2019 / Revised: 7 November 2019 / Accepted: 12 November 2019 / Published: 18 November 2019

(This article belongs to the Special Issue Erosion of Nanostructured Coatings)

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Abstract

TiN/Ti coatings have great application potential in improving aero-engine server lives in a dusty environment. However, the damage behavior and mechanism of the coating and substrate under high impact speed and multi-direction loading conditions has scarcely been investigated. In this paper, TiN/Ti coatings were deposited on Ti6Al4V alloys by a magnetic filter cathode vacuum arc. Multi-directional impact tests were carried out by a gas gun system at, 45°, 60°, and 90° with a velocity of 330 m/s. The damage behaviors and mechanisms of the TiN/Ti coatings were investigated and revealed by researching the damage morphology, crack propagation, and stress distribution. The results show that plastic deformation occurs both in the coatings and the substrates under high speed impacting. Cracks extend vertically downward in the TiN layer first and are deflected at the Ti layer when the driving force is not enough. Circular cracks and radical cracks are found to form network cracks on the surface of the coating and the shear stress loaded by the particles, which drives cracks’ propagation is the main reason for the peeling off on the coatings.

Keywords: TiN/Ti coatings; multi-directional impact test; high erode speed; damage mechanism

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MDPI and ACS Style

Fang, Z.; Chen, J.; He, W.; Yang, Z.; Yuan, Z.; Geng, M.; He, G. Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact. Coatings 2019, 9, 765. https://doi.org/10.3390/coatings9110765

AMA Style

Fang Z, Chen J, He W, Yang Z, Yuan Z, Geng M, He G. Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact. Coatings. 2019; 9(11):765. https://doi.org/10.3390/coatings9110765

Chicago/Turabian Style

Fang, Zhihao, Jiao Chen, Weifeng He, Zhufang Yang, Zhanwei Yuan, Mingrui Geng, and Guangyu He. 2019. "Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact" Coatings 9, no. 11: 765. https://doi.org/10.3390/coatings9110765

APA Style

Fang, Z., Chen, J., He, W., Yang, Z., Yuan, Z., Geng, M., & He, G. (2019). Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact. Coatings, 9(11), 765. https://doi.org/10.3390/coatings9110765

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Study on the Damage Mechanism of TiN/Ti Coatings Based on Multi-Directional Impact

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