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Research on fatigue crack growth behavior: Experimental and prediction method of titanium alloy

School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, P. R. China

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Huang Xiangyu

China Classification Society, Fuzhou Fujian 350000, P. R. China

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Wang Ke

School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, P. R. China

E-mail Address: ecsibelle@126.com

Corresponding author.

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Bai Xu

School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, P. R. China

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Li Yanqing

China Ship Scientific Research Center, Wuxi Jiangsu 214000, P. R. China

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Zhang Shixin

School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, P. R. China

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Bian Chao

China Classification Society, Taizhou Jiangsu 225300, P. R. China

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Bian Chengcheng

School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, P. R. China

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Gao Longqian

School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, P. R. China

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, and

Wu Li

School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, P. R. China

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https://doi.org/10.1142/S0217979222400719Cited by:0 (Source: Crossref)

This article is part of the issue:

SPECIAL ISSUE (PART 2): Advanced Materials and Processing Technologies
Guest Editors: Wei Gao, Peng Cao, Yuxin Wang and Zhen He

Abstract

A new type of titanium alloy for the pressure shell of a manned deep-sea submersible is studied. The fatigue performance and the fracture toughness of the titanium alloy are obtained under R = 0.03, 0.3, and 0.5. The curves of fatigue crack growth rate under three load ratios are predicted based on the existing fatigue crack growth rate prediction model. The results show that the fatigue crack growth threshold decreases with the increase of the load ratio, and the fatigue crack growth rate increases with the increase of the load ratio. The fatigue crack growth prediction model can accurately predict the fatigue crack growth rate of titanium alloy under different load ratios.

Keywords:

PACS: 62.20.me, 62.20.mm, 62.20.mt

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