High-cycle fatigue properties of hot-rolled bonding titanium-clad bimetallic steel

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2025-02-07 DOI:10.1016/j.ijfatigue.2025.108865

Huiyong Ban , Chenyang Huang , Yongjiu Shi , Letian Hai

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Abstract

The corrosive marine environment brings significant challenges to traditional steel materials, prompting the exploration of alternative solutions in terms of advanced structural materials, such as titanium-clad (TC) bimetallic steel. This paper presents an experimental investigation into the basic mechanical properties and high-cycle fatigue behaviour of hot-rolled bonding TC bimetallic steels with different clad ratios and surface roughness. Based on a series of tensile coupon tests, bonding interface shear tests, combine tests, and high-cycle fatigue tests, the failure modes, static strengths of base metal and bonding interface as well as fatigue lives are clarified, and experimental S-N curves of the TC bimetallic steel are obtained and analysed by comparing with those of titanium alloys and conventional structural steels. SEM images are taken and studied to provide insights into fatigue crack propagation mechanisms. Additionally, the effects of clad ratio and surface roughness on fatigue performance are also elucidated. Finally, the paper proposes a reliable design S-N curve with a fatigue strength of 321.7 MPa for the hot-rolled bonding TC bimetallic steel. The research outcomes may contribute to predicting fatigue strength for TC bimetallic steel, and offer valuable insights for structural engineering applications of such advanced bimetallic steel.

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来源期刊

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.