On the influence of build direction on the fatigue crack growth resistance of Selective Laser Melted Ti-6Al-4V

Rans, Calvin; Michielssen, Jef; Walker, Megan; Wang, Wandong; Hoen-Velterop, L. 't

doi:10.2514/6.2018-1643

Cited by 5 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This paper has made use of a dataset of the crack growth data published in [30]. The raw data from that publication are also available online at [41]. This dataset originally made use of the following stress intensity factor solution for a single-edge notch tension specimen of width W and crack length a: is the β correction factor solution for a single edge notch tension specimen obtained from [42], and Figure A1.…”

Section: Appendix B: the Stress Intensity Factor Correction For The Tmentioning

confidence: 99%

“…The authors of [30] misinterpreted it as a solution for the clamped boundary condition matching the condition of their experiments. In the present paper, the authors have accessed the raw data from [41] and reprocessed it using the β factor for a clamped single-edge notch tension specimen published in [43] for H/W = 1.5. This β factor solution can be expressed as:…”

Section: Appendix B: the Stress Intensity Factor Correction For The Tmentioning

confidence: 99%

See 1 more Smart Citation

Further Studies into Crack Growth in Additively Manufactured Materials

et al. 2020

Self Cite

View full text Add to dashboard Cite

Understanding and characterizing crack growth is central to meeting the damage tolerance and durability requirements delineated in USAF Structures Bulletin EZ-SB-19-01 for the utilization of additive manufacturing (AM) in the sustainment of aging aircraft. In this context, the present paper discusses the effect of different AM processes, different build directions, and the variability in the crack growth rates related to AM Ti-6Al-4V, AM Inconel 625, and AM 17-4 PH stainless steel. This study reveals that crack growth in these three AM materials can be captured using the Hartman–Schijve crack growth equation and that the variability in the various da/dN versus ΔK curves can be modeled by allowing the terms ΔKthr and A to vary. It is also shown that for the AM Ti-6AL-4V processes considered, the variability in the cyclic fracture toughness appears to be greatest for specimens manufactured using selective layer melting (SLM).

show abstract

Section: Appendix B: the Stress Intensity Factor Correction For The Tmentioning

confidence: 99%

Section: Appendix B: the Stress Intensity Factor Correction For The Tmentioning

confidence: 99%

Further Studies into Crack Growth in Additively Manufactured Materials

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…When reviewing these figures, the reader is reminded that the data for the 90 • orientation is comprised of one less specimen than the other orientations, which may produce a false sense of reduced scatter for this orientation. The raw crack length vs. cycles data and the scripts used to calculate the crack growth rates have been made available online [29]. The axes in Fig.…”

Section: Crack Growth Curvesmentioning

confidence: 99%

Beyond the orthogonal: on the influence of build orientation on fatigue crack growth in SLM Ti-6Al-4V

Rans

Michielssen

Walker

et al. 2018

International Journal of Fatigue

Self Cite

View full text Add to dashboard Cite

A challenge in developing an in-depth understanding of the crack growth resistance of Additively Manufactured materials is the fact that their mechanical properties have been shown to be both process and part-geometry dependent. Up to now, no studies have investigated the influence of off-axis (beyond the three orthogonal build orientations) orientations on the fatigue crack growth behaviour of selective laser melted Ti-6Al-4V. Furthermore, the widespread use of compact tension specimens for investigating the material behaviour generates data more suitable for plane-strain conditions, rather than the plane-stress state which is more applicable to many lightweight aerospace structures. To address this gap in knowledge, a comprehensive study was carried out to investigate the influence of off-axis build direction in thin SLM Ti-6Al-4V plates, with a focus on the influence of columnar grain orientation on the fatigue crack growth behaviour. It was found that although a macroscopic columnar grain structure is visible on the specimens, it had no discernible influence on the crack growth resistance when the specimen had undergone a stress relieving or HIP heat treatment.

show abstract

“…Additive Manufacturing (AM) represents a 3D manufacturing technology that allows objects to be made layer by layer and enables the printing of implants with complex and individualized geometries, which provide a functional and aesthetic solution for replacing lost teeth [ [1] , [2] , [3] , [4] , [5] , [6] , [7] ]. 3D implants are created from a computer prototype that will be printed in successive layers with micrometric precision according to the patient's anatomy, optimal implant position, and occlusion, which can result in better integration with the bone and a higher long-term success rate [ [8] , [9] , [10] , [11] ].…”

Section: Introductionmentioning

confidence: 99%

“…The thickness of each layer impacts the accuracy and printing time, with smaller layers resulting in a more detailed surface finish. The number and speed of scans refer to the frequency and speed with which the beam strikes the part, and can affect the material density, adhesion between layers, modulus of elasticity, mechanical strength, and fatigue of the implant [ 2 , [16] , [17] , [18] , [19] , [21] , [22] , [23] , [24] , [25] , [26] ].…”

Section: Introductionmentioning

confidence: 99%

Influence of building direction on physical and mechanical properties of titanium implants: A systematic review

Calazans Neto,

Reis,

Valente

2024

Heliyon

View full text Add to dashboard Cite

On the influence of build direction on the fatigue crack growth resistance of Selective Laser Melted Ti-6Al-4V

Cited by 5 publications

References 19 publications

Further Studies into Crack Growth in Additively Manufactured Materials

Further Studies into Crack Growth in Additively Manufactured Materials

Beyond the orthogonal: on the influence of build orientation on fatigue crack growth in SLM Ti-6Al-4V

Influence of building direction on physical and mechanical properties of titanium implants: A systematic review

Contact Info

Product

Resources

About