超声轧制提高34CrNiMo钢高速激光直接能量沉积Inconel 625涂层的疲劳性能

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2025-04-17 DOI:10.1016/j.ijfatigue.2025.109007

Cheng Zhong , Peng Liu , Bin Li , Xiaodi Wang , Alex A. Volinsky , Xuechong Ren

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引用次数: 0

摘要

34CrNiMo钢的耐腐蚀性有限，限制了其在富氯化物环境中的应用。为了解决这个问题，使用高速激光直接能量沉积技术在34CrNiMo钢上沉积了一层Inconel 625合金涂层，具有优异的抗氯化物腐蚀性能。然而，涂层试样的疲劳强度比裸态34CrNiMo钢降低了100 MPa。去应力退火使材料的疲劳强度提高了25 MPa，但使极限抗拉强度降低了302 MPa。相比之下，表面超声轧制处理提高了极限抗拉强度和疲劳强度，达到了与裸34CrNiMo钢相当的水平。这种改进是由于超声轧制产生的残余压应力和疲劳起始点从涂层转移到基体。在3.5% NaCl溶液中进行腐蚀疲劳试验，超声轧制涂层试样的腐蚀疲劳强度比裸层34CrNiMo钢高200 MPa，证明了超声轧制和涂层Inconel 625在提高34CrNiMo钢的疲劳和腐蚀疲劳性能方面的有效性。

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Enhanced fatigue performance of high-speed laser direct energy deposition Inconel 625 coatings on 34CrNiMo steel using ultrasonic rolling

The limited corrosion resistance of 34CrNiMo steel restricts its use in chloride-rich environments. To address this, an Inconel 625 alloy coating was deposited on 34CrNiMo steel using high-speed laser direct energy deposition, providing excellent resistance to chloride-induced corrosion. However, the fatigue strength of the coated specimen decreased by 100 MPa compared to bare 34CrNiMo steel. Stress-relieving annealing increased the fatigue strength by 25 MPa but reduced the ultimate tensile strength by 302 MPa. In contrast, surface ultrasonic rolling treatment improved both the ultimate tensile strength and fatigue strength, achieving levels comparable to bare 34CrNiMo steel. This improvement is due to residual compressive stress from ultrasonic rolling and the shifting of fatigue initiation from the coating to the substrate. Corrosion fatigue testing in a 3.5 % NaCl solution showed that ultrasonic-rolled coated specimens had a corrosion fatigue strength 200 MPa higher than bare 34CrNiMo steel, demonstrating the effectiveness of ultrasonic rolling and the Inconel 625 coating in enhancing the fatigue and corrosion fatigue performance of 34CrNiMo 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.