Effect of crack-like defects on the fracture behaviour of Wire + Arc Additively Manufactured nickel-base Alloy 718

Seow, Cui Er; Zhang, Jie; Coules, Harry; Wu, Guiyi; Jones, Christopher P; Ding, Jialuo; Williams, Stewart

doi:10.1016/j.addma.2020.101578

Cited by 37 publications

(18 citation statements)

References 56 publications

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“… A comparison between dye penetrant testing (the dashed section in ( A ) depicts the area examined with ultrasound techniques shown in ( B )) ( A ), conventional ultrasonic ( B ) and X-ray radiographic technologies ( C ) carried out by Seow et al [ 20 ]. …”

Section: Figurementioning

confidence: 99%

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A Review of Non-Destructive Testing (NDT) Techniques for Defect Detection: Application to Fusion Welding and Future Wire Arc Additive Manufacturing Processes

et al. 2022

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In Wire and Arc Additive Manufacturing (WAAM) and fusion welding, various defects such as porosity, cracks, deformation and lack of fusion can occur during the fabrication process. These have a strong impact on the mechanical properties and can also lead to failure of the manufactured parts during service. These defects can be recognized using non-destructive testing (NDT) methods so that the examined workpiece is not harmed. This paper provides a comprehensive overview of various NDT techniques for WAAM and fusion welding, including laser-ultrasonic, acoustic emission with an airborne optical microphone, optical emission spectroscopy, laser-induced breakdown spectroscopy, laser opto-ultrasonic dual detection, thermography and also in-process defect detection via weld current monitoring with an oscilloscope. In addition, the novel research conducted, its operating principle and the equipment required to perform these techniques are presented. The minimum defect size that can be identified via NDT methods has been obtained from previous academic research or from tests carried out by companies. The use of these techniques in WAAM and fusion welding applications makes it possible to detect defects and to take a step towards the production of high-quality final components.

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Section: Figurementioning

confidence: 99%

“…Seow et al [ 20 ] employed dye penetrant testing, conventional ultrasonic testing and digital X-ray radiography to recognize crack-like imperfections in a WAAM Alloy 718 component. As depicted in Figure 2 , these technologies are able to find crack-like defects in WAAM.…”

Section: Introductionmentioning

confidence: 99%

A Review of Non-Destructive Testing (NDT) Techniques for Defect Detection: Application to Fusion Welding and Future Wire Arc Additive Manufacturing Processes

et al. 2022

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“…Varian et al [199] reported that LSP-induced compressive stresses and severe plastic deformation result in refining microstructure with homogeneous material properties. The wrought alloy has a higher work hardening rate when compared to WAAM deposited alloy [200]. Zhang et al [201] investigated a 0.99% mixer of nitrogen content in Cr-Mn steel processed by CMT-based WAAM.…”

Section: Work Hardeningmentioning

confidence: 99%

Assessment of Process, Parameters, Residual Stress Mitigation, Post Treatments and Finite Element Analysis Simulations of Wire Arc Additive Manufacturing Technique

Kumar

Manikandan

2021

Met. Mater. Int.

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Wire arc additive manufacturing (WAAM) technique became an emerging manufacturing technology because of its costeffective in creating large-scale metal parts with moderately high deposition rates. Mainly, WAAM works through the utilization of heat source as an electric arc by melting the metal wire to build the three-dimensional metal parts in a layer-by-layer approach, which may significantly minimize the fabrication costs compared to powder and other additive manufacturing techniques such as laser and electron beam, similarly. This article reviews WAAM processes and methods and gives an exhaustive overview of the residual stresses, microstructures, and material properties of the as-fabricated and post-fabrication treated WAAM components. The typical defects during the fabrication of metal components by the WAAM process are residual stresses, deformity, porosity, and cracking. And also, methods on controlling residual stresses, improving material properties, and effects of post-processing treatments to enhance the part quality fabricated by using the WAAM process are recommended in this review. Finally, the measurement methods of residual stresses in the metal parts and FEA simulations in the WAAM are discussed. FEA simulations provide better insights on moving heat source model, temperature distributions, and residual stresses in the WAAM process. This article concludes that selecting process parameters affects the quality WAAM component during the deposition process. And also, approaches to improving the part quality are proposed. The materials fabrication issues in the WAAM processes were outlined, and the advanced WAMM processes were suggested to obtain high quality and defect-free WAAM parts.

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“…WAAM adopts arc welding tools and wire as feedstock for the fabrication of structures of low to medium complexity [ 48 ]. Although the parts built by WAAM are near-net shape, they often show significant anisotropy in terms of both microstructure and mechanical properties [ 49 ], with crack-like defects formed under unfavorable deposition conditions [ 50 ]. This is mainly due to the fact that in fusion-based AM technologies, the temperature involved in the process is higher than the melting point of the materials to be joined.…”

Section: Additive Manufacturingmentioning

confidence: 99%

Applications of Additively Manufactured Tools in Abrasive Machining—A Literature Review

et al. 2021

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High requirements imposed by the competitive industrial environment determine the development directions of applied manufacturing methods. 3D printing technology, also known as additive manufacturing (AM), currently being one of the most dynamically developing production methods, is increasingly used in many different areas of industry. Nowadays, apart from the possibility of making prototypes of future products, AM is also used to produce fully functional machine parts, which is known as Rapid Manufacturing and also Rapid Tooling. Rapid Manufacturing refers to the ability of the software automation to rapidly accelerate the manufacturing process, while Rapid Tooling means that a tool is involved in order to accelerate the process. Abrasive processes are widely used in many industries, especially for machining hard and brittle materials such as advanced ceramics. This paper presents a review on advances and trends in contemporary abrasive machining related to the application of innovative 3D printed abrasive tools. Examples of abrasive tools made with the use of currently leading AM methods and their impact on the obtained machining results were indicated. The analyzed research works indicate the great potential and usefulness of the new constructions of the abrasive tools made by incremental technologies. Furthermore, the potential and limitations of currently used 3D printed abrasive tools, as well as the directions of their further development are indicated.

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Effect of crack-like defects on the fracture behaviour of Wire + Arc Additively Manufactured nickel-base Alloy 718

Cited by 37 publications

References 56 publications

A Review of Non-Destructive Testing (NDT) Techniques for Defect Detection: Application to Fusion Welding and Future Wire Arc Additive Manufacturing Processes

A Review of Non-Destructive Testing (NDT) Techniques for Defect Detection: Application to Fusion Welding and Future Wire Arc Additive Manufacturing Processes

Assessment of Process, Parameters, Residual Stress Mitigation, Post Treatments and Finite Element Analysis Simulations of Wire Arc Additive Manufacturing Technique

Applications of Additively Manufactured Tools in Abrasive Machining—A Literature Review

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