Healing cracks in selective laser melting by 3D laser shock peening

Kalentics, Nikola; Sohrabi, Navid; Ghasemi-Tabasi, Hossein; Griffiths, Seth; Jhabvala, Jamasp; Leinenbach, Christian; Burn, Andreas; Logé, Roland E.

doi:10.1016/j.addma.2019.100881

Cited by 32 publications

(18 citation statements)

References 27 publications

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“…Owing to the excellent high-temperature properties and wide engineering application of nickel-based superalloys, the fabrication of superalloy parts by the promising additive manufacturing (AM) techniques is of great interest. Extensive investigations have been done regarding the AM process tailoring, the post-process treatments, and characterization of high-temperature mechanical and chemical properties of a group of γ precipitate-strengthened nickel-based superalloys, such as IN939 [3], IN738LC [4][5][6], and CM247LC [7,8]. The compositions of these superalloys were proposed decades ago but, unfortunately, they were not developed with the intention of being adopted for AM processes.…”

Section: Introductionmentioning

confidence: 99%

A Novel γ′-Strengthened Nickel-Based Superalloy for Laser Powder Bed Fusion

Gruber

Peng

et al. 2020

Materials

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An experimental printable γ′-strengthened nickel-based superalloy, MAD542, is proposed. By process optimization, a crack-free component with less than 0.06% defect was achieved by laser powder bed fusion (LPBF). After post-processing by solution heat treatment, a recrystallized structure was revealed, which was also associated with the formation of annealing twins. After the aging treatment, 60–65% γ′ precipitates were obtained with a cuboidal morphology. The success of printing and post-processing the new MAD542 superalloy may give new insights into alloy design approaches for additive manufacturing.

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Section: Introductionmentioning

confidence: 99%

A Novel γ′-Strengthened Nickel-Based Superalloy for Laser Powder Bed Fusion

Gruber

Peng

et al. 2020

Materials

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“…It was shown that LSP has reduced the distortion angle by up to 75% compared to as-built specimens. Furthermore, 3D LSP was used for nickel-based alloy produced by SLM [ 270 ]. A 95% reduction in the number of cracks in this very crack-prone alloy wiring welding has been observed.…”

Section: Modern and Future Trends In Additive Manufacturing Of Crmmentioning

confidence: 99%

Powder Bed Fusion Additive Manufacturing Using Critical Raw Materials: A Review

et al. 2021

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The term “critical raw materials” (CRMs) refers to various metals and nonmetals that are crucial to Europe’s economic progress. Modern technologies enabling effective use and recyclability of CRMs are in critical demand for the EU industries. The use of CRMs, especially in the fields of biomedicine, aerospace, electric vehicles, and energy applications, is almost irreplaceable. Additive manufacturing (also referred to as 3D printing) is one of the key enabling technologies in the field of manufacturing which underpins the Fourth Industrial Revolution. 3D printing not only suppresses waste but also provides an efficient buy-to-fly ratio and possesses the potential to entirely change supply and distribution chains, significantly reducing costs and revolutionizing all logistics. This review provides comprehensive new insights into CRM-containing materials processed by modern additive manufacturing techniques and outlines the potential for increasing the efficiency of CRMs utilization and reducing the dependence on CRMs through wider industrial incorporation of AM and specifics of powder bed AM methods making them prime candidates for such developments.

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“…Moreover, it increased crack initiation time and reduced crack propagation rate compared to LSP. Kalentics et al [ 137 ] conducted 3D LSP experiments on a nickel-based superalloy CM247LC, which is prone to cracking during fusion welding and SLM.…”

Section: Peening Techniquesmentioning

confidence: 99%

Peening Techniques for Surface Modification: Processes, Properties, and Applications

et al. 2021

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Surface modification methods have been applied to metals and alloys to change the surface integrity, obtain superior mechanical properties, and improve service life irrespective of the field of application. In this review paper, current state-of-the-art of peening techniques are demonstrated. More specifically, classical and advanced shot peening (SP), ultrasonic impact peening (UIP), and laser shock peening (LSP) have been discussed. The effect of these techniques on mechanical properties, such as hardness, wear resistance, fatigue life, surface roughness, and corrosion resistance of various metals and alloys, are discussed. This study also reports the comparisons, advantages, challenges, and potential applications of these processes.

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Healing cracks in selective laser melting by 3D laser shock peening

Cited by 32 publications

References 27 publications

A Novel γ′-Strengthened Nickel-Based Superalloy for Laser Powder Bed Fusion

A Novel γ′-Strengthened Nickel-Based Superalloy for Laser Powder Bed Fusion

Powder Bed Fusion Additive Manufacturing Using Critical Raw Materials: A Review

Peening Techniques for Surface Modification: Processes, Properties, and Applications

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