Additive manufacturing in the context of structural integrity

Gorelik, Michael

doi:10.1016/j.ijfatigue.2016.07.005

Cited by 173 publications

(91 citation statements)

References 12 publications

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“…However, several challenges need to be solved before AM can be fully adopted by these industries . Uncertainty in structural performance of fabricated parts—particularly fatigue performance—along with current lack of field experience with AM components, and limited component‐level production experience are the main challenges in this regard …”

Section: Introductionmentioning

confidence: 99%

Fatigue‐life prediction of additively manufactured material: Effects of heat treatment and build orientation

Yadollahi

Elwany

Doude

et al. 2020

Fatigue Fract Eng Mat Struct

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In this study, the crack‐growth approach is used to predict the fatigue life of 17‐4 precipitation hardening (PH) stainless steel (SS) fabricated via an additive manufacturing (AM) system in different orientations (ie, vertical and horizontal) before and after heat treatment. To perform fatigue‐life calculations, the effective stress intensity factor as a function of crack‐growth rate was obtained from testing modified compact specimens with different crack orientations in as‐built and heat‐treated conditions. The plasticity‐induced crack closure model, FASTRAN, was used to calculate fatigue lives based on the size of process‐induced defects. Results indicated that in the presence of large voids (ie, lack‐of‐fusion defects), the total fatigue life of AM 17‐4 PH SS in as‐built and heat‐treated conditions is dominated by crack growth. Effect of build orientation on fatigue life of AM 17‐4 PH SS was also captured based on the size of defects projected on a plane perpendicular to the loading direction.

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Section: Introductionmentioning

confidence: 99%

Fatigue‐life prediction of additively manufactured material: Effects of heat treatment and build orientation

Yadollahi

Elwany

Doude

et al. 2020

Fatigue Fract Eng Mat Struct

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“…The sentence used in [37] was: "The surface roughness is the single most severe factor for fatigue for additive manufactured materials". The importance of characterizing the material discontinuities, including surface roughness, associated with AM materials is also stressed in [33,32,42]. Indeed, [42] suggested that, as we have seen in the previous section, the surface roughness of the material can be treated in the same way as short cracks.…”

Section: Implications For Additively Manufactured Structuresmentioning

confidence: 94%

“…The importance of characterizing the material discontinuities, including surface roughness, associated with AM materials is also stressed in [33,32,42]. Indeed, [42] suggested that, as we have seen in the previous section, the surface roughness of the material can be treated in the same way as short cracks. The present paper therefore suggests that the methodology outlined above has the potential to study the growth of small naturally occurring cracks that arise and grow form rough surfaces in Additively Manufactured Ti-6Al-4V.…”

Section: Implications For Additively Manufactured Structuresmentioning

confidence: 94%

Effect of corrosion and fatigue on the remaining life of structures and its implication to additive manufacturing

Peng

Jones²,

Berto

et al. 2018

Frattura Ed Integrità Strutturale

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ABSTRACT. This paper investigates the combined effect of corrosion and fatigue on the growth of cracks that arise from natural corrosion in steel bridges. It is shown that if these two effects need to be simultaneously analyzed. If not, then the resulting life is not conservative. Consequently, to enable a better understanding of the remaining life of steel bridges this paper presents a simple methodology for performing this coupled analysis. The implication of this study to additively manufactured Ti-6Al-4V is also discussed. KEYWORDS. Steel bridges; Corrosion; Fatigue crack growth; Remaining life.Citation: Peng., D., Jones, R., Berto, F., Razavi, S.M.J., Effect of corrosion and fatigue on the remaining life of structures and its implication to additive manufacturing, Frattura ed Integrità Strutturale, 45 (2018) 33-44.

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“…[263] This approach may become the norm when attempting to certify parts produced by AM processes. Traditional NDI techniques may not prove effective, or multiple techniques may be required to address the unique features of parts produced by AM processes.…”

Section: Part Inspectionmentioning

confidence: 99%

Laser‐Based Additive Manufacturing Technologies for Aerospace Applications

2019

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Additive manufacturing (AM) is a transformative technology that has rapidly grown over the past decade. AM processes build parts layer by layer and have found applications in the aerospace, biomedical, and automotive fields. The technology holds particular promise for the aerospace industry due to the reduced process time, weight savings of parts, and opportunities for new material development. Herein, a review of laser-based AM processes, existing AM systems, and aerospace parts being fabricated is presented. It further explores the material properties and microstructure of printed samples with both powder bed fusion and direct energy deposition processes. The benefits and challenges associated with the widespread use of the technology are discussed with emphases on the aerospace sector. Finally, the steps required for parts produced by AM processes to become certified for use in aerospace applications are presented.

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Additive manufacturing in the context of structural integrity

Cited by 173 publications

References 12 publications

Fatigue‐life prediction of additively manufactured material: Effects of heat treatment and build orientation

Fatigue‐life prediction of additively manufactured material: Effects of heat treatment and build orientation

Effect of corrosion and fatigue on the remaining life of structures and its implication to additive manufacturing

Laser‐Based Additive Manufacturing Technologies for Aerospace Applications

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