Cyclic plasticity and ULCF behavior of steel butt-joints considering different welding methods

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2023-08-01 DOI:10.1016/j.ijfatigue.2023.107684

Yuelin Zhang , Cheng Fang , Wei Wang , Haowen Hou

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引用次数: 2

Abstract

In order to reveal the influence of welding method on the cyclic plasticity and ultra-low cycle fatigue (ULCF) behavior of low-alloy butt-joints, three different welding methods, namely, shielded metal arc welding (SMAW), gas metal arc welding (GMAW), and submerged arc welding (SAW), were considered. Dog-bone flat-plate specimens with the welds were cut off from the plates for cyclic tests. The load-carrying capacity, energy dissipation property, and ULCF performance of the specimens were discussed. According to the experimental results, GMAW and SAW lead to the highest and lowest peak loads, respectively. The various welding methods have a slight influence on the equivalent viscos damping (EVD) coefficient of the specimens. Compared with those of the base metal (BM) specimen, ductility of the welded specimens is degraded by 34.62–61.54%, yield strength is deteriorated by 2.86–13.20%, ULCF life is decreased by 71.33%-92.31%. Metallurgical and scanning electron microscope (SEM) analysis were further conducted to reveal the mechanism behind the significantly compromised ULCF behavior of the welded specimens. In-depth numerical analysis was also conducted to reproduce the experimental processes. In the finite element (FE) analysis, inverse calibration technique was applied to determine the Voce-Chaboche (VC) combined hardening constitutive model parameters, and then cyclic void growth model (CVGM) was adopted for fracture simulation.

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考虑不同焊接方法的钢对接的循环塑性和ULCF行为

为了揭示焊接方式对低合金对接接头循环塑性和超低周疲劳(ULCF)行为的影响，研究了三种不同的焊接方式，即保护金属电弧焊(SMAW)、气体金属电弧焊(GMAW)和埋弧焊(SAW)。带焊缝的狗骨平板试样从板上剪下来进行循环试验。讨论了试件的承载能力、耗能性能和ULCF性能。实验结果表明，GMAW和SAW分别导致最高和最低峰值负荷。不同的焊接方式对试件的等效粘滞阻尼(EVD)系数影响较小。与母材(BM)试样相比，焊接试样的塑性下降34.62 ~ 61.54%，屈服强度下降2.86 ~ 13.20%，ULCF寿命下降71.33% ~ 92.31%。进一步进行了金相分析和扫描电镜(SEM)分析，以揭示焊接试样ULCF行为显著受损的机制。对实验过程进行了深入的数值分析。在有限元(FE)分析中，采用逆校正技术确定Voce-Chaboche (VC)联合硬化本构模型参数，然后采用循环空洞生长模型(CVGM)进行断裂模拟。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.