Peridynamic analysis to investigate the influence of microstructure and porosity on fatigue crack propagation in additively manufactured Ti6Al4V

Karpenko, Olena; Oterkus, Selda; Öterkuş, Erkan

doi:10.1016/j.engfracmech.2021.108212

Cited by 15 publications

(6 citation statements)

References 57 publications

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“…Based on the results presented in Figure 10, it is evident that the porosity order within the stress concentration region is as follows: VG‐BCC > U‐BCC > LG‐BCC. Karpenko et al 32 pointed out that cracks are more likely to propagate in the regions with higher porosity, suggesting that the order of crack propagation in the stress concentration region is VG‐BCC > U‐BCC > LG‐BCC.…”

Section: Discussionmentioning

confidence: 99%

“…Based on the results presented in Figure 10, it is evident that the porosity order within the stress concentration region is as follows: VG-BCC > U-BCC > LG-BCC. Karpenko et al 32 pointed out that cracks are more likely to propagate in the regions with higher porosity, suggesting that the Taking the results of Yang et al 22 into consideration, when the cell structures are the same, the Young's modulus of the samples can be calculated using the Gibson-Ashby model:…”

Section: Corrosion Fatigue Propertiesmentioning

confidence: 99%

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Corrosion fatigue behavior of continuous gradient porous Ti‐15Mo alloy prepared by selective laser melting

Chen,

Zhou

et al. 2024

Fatigue Fract Eng Mat Struct

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In this work, porous Ti‐15Mo scaffolds with different porosity gradient structures (uniform gradient structures [U‐BCC], level gradient structures [LG‐BCC], and vertical gradient structures [VG‐BCC]) were fabricated by selective laser melting, and the corrosion fatigue testing in Hank's solution was conducted for the first time. The fatigue strength order, when considering the same fatigue life, follows the sequence of LG‐BCC structure > U‐BCC structure > VG‐BCC structure. Cyclic ratcheting is a prominent factor leading to fatigue failure. The sequence of crack initiation and propagation in the latter stage of corrosion fatigue can be listed as follows: LG‐BCC structure < U‐BCC structure < VG‐BCC structure. During the corrosion fatigue process, the grain refinement occurs, and the deformation twinning is generated, leading to a dissipation of energy and an increase of the fatigue resistance. The corrosive effect of Hank's solution induces the surface roughening of the sample, accelerating crack initiation and propagation.

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Section: Discussionmentioning

confidence: 99%

Section: Corrosion Fatigue Propertiesmentioning

confidence: 99%

Corrosion fatigue behavior of continuous gradient porous Ti‐15Mo alloy prepared by selective laser melting

Chen,

Zhou

et al. 2024

Fatigue Fract Eng Mat Struct

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“…A bond-based peridynamic model was utilized to evaluate the effect of the microstructure and the existence of pores in AM Ti6Al4V on fatigue crack growth. The results showed that the coarse-grained microstructure had a higher fatigue crack growth resistance, and the porosities weakened the structural integrity and increased the crack growth rate [49]. For the type 304L stainless steel, the fatigue crack growth rates were measured to be 3.5 times faster than that of the wrought-type 304L stainless steel in the near threshold regime (< 10 −8 m/cycle) at an applied ∆K of 5 MPa•m 0.5 .…”

Section: Fatigue Behaviors With As-built Defects and Residual Stressesmentioning

confidence: 99%

“…The crystal plastic finite element model based on the Voronoi diagram was developed to reveal the fatigue crack growth in AM metals [64]. The peridynamic method was applied to study the fracture behaviors of the AM metals with void and micro-crack defects [39,49]. With the development of digital data and machine learning, data-driven modeling has emerged as an effective approach and as a key building block of various AM design and management frameworks, such as design for AM [65], digital twin for AM [66], smart AM [67,68] and cloud AM [69].…”

Section: Experiments and Numerical Simulationsmentioning

confidence: 99%

A Review of the Latest Developments in the Field of Additive Manufacturing Techniques for Nuclear Reactors

Zhang

et al. 2022

Crystals

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This review paper provides insights the into current developments in additive manufacturing (AM) techniques. The comprehensive presentations about AM methods, material properties (i.e., irradiation damage, as-built defects, residual stresses and fatigue fracture), experiments, numerical simulations and standards are discussed as well as their advantages and shortages for the application in the field of nuclear reactor. Meanwhile, some recommendations that need to be focused on are presented to advance the development and application of AM techniques in nuclear reactors. The knowledge included in this paper can serve as a baseline to tailor the limitations, utilize the superiorities and promote the wide feasibilities of the AM techniques for wide application in the field of nuclear reactors.

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“…Given the limitations of existing methods for simulating discontinuity problems such as crack initiation and propagation, peridynamics (PD) as a new nonlocal theory developed by Silling et al [22] provides a more refined approach for materials damage analysis. The PD employs the integral equations of motion instead of the conventional spatial differential equations, thus overcoming the challenges of modeling the discontinuity problems with spatial differential equations used in CCM.In fact, PD theory has been widely used in various fields to deal with discontinuity problems, including quasi-static fracture problems [23], dynamic fracture of brittle materials [24,25], composites cutting [26,27] and impact [28,29], fatigue cracking [30], heat conduction phenomena [31,32] etc. Cao et al used PD simulations to describe the nanoindentation of an archetypical soda-lime silicate window glass [33].…”

Section: Introductionmentioning

confidence: 99%

Peridynamic simulations of damage in indentation and scratching of 3C-SiC

Zhu

2022

Journal of Materials Research

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The cubic silicon carbide (3C-SiC) has broad application prospects in many fields due to its excellent material properties. The modeling of damage in 3C-SiC due to contact loads is important yet challenging. In this paper, simulations based on ordinary state-based peridynamics (PD) theory are proposed to model the damage of 3C-SiC in indentation and scratching. The constitutive parameters of 3C-SiC for PD simulation are obtained by performing MD simulations of nanoindentation. It is found that in the indentation simulations the initiation and propagation of cracks are observed, which shows that the PD can model the crack formation and propagation in the indentation process of brittle solid materials. During the scratching process, the variation of friction force is consistent with that of material wear. It is also found that the specific cutting energy increases nonlinearly with the decrease of scratching depth due to size effect. In addition, for the scratching with double indenters, the volume of material removal is more than twice that of scratching with an indenter due to the coupling effect of the two indenters under certain conditions. This paper demonstrates that PD is a powerful tool to investigate the indentation and scratching process of brittle solid materials.

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Peridynamic analysis to investigate the influence of microstructure and porosity on fatigue crack propagation in additively manufactured Ti6Al4V

Cited by 15 publications

References 57 publications

Corrosion fatigue behavior of continuous gradient porous Ti‐15Mo alloy prepared by selective laser melting

Corrosion fatigue behavior of continuous gradient porous Ti‐15Mo alloy prepared by selective laser melting

A Review of the Latest Developments in the Field of Additive Manufacturing Techniques for Nuclear Reactors

Peridynamic simulations of damage in indentation and scratching of 3C-SiC

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