Regain the fatigue strength of laser additive manufactured Ti alloy via laser shock peening

Luo, Sihai; He, Weifeng; Chen, Kai; Nie, Xiangfan; Zhou, Lian; Li, Yiming

doi:10.1016/j.jallcom.2018.04.029

Cited by 87 publications

(25 citation statements)

References 39 publications

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“…Heat and surface treatments have shown to enhance the mechanical properties of AM parts and also to reduce the porosity and improve their microstructural characteristics. Additionally, some of these treatments have shown to reduce the tensile residual stresses of AM parts; hence, their fatigue behaviour is also improved [96][97][98][99][100][101][102][103][104].…”

Section: The Need For Hybridmentioning

confidence: 99%

Powder-based laser hybrid additive manufacturing of metals: a review

Jiménez

Bidare

Hassanin

et al. 2021

Int J Adv Manuf Technol

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Recent advances in additive manufacturing (AM) have attracted significant industrial interest. Initially, AM was mainly associated with the fabrication of prototypes, but the AM advances together with the broadening range of available materials, especially for producing metallic parts, have broaden the application areas and now the technology can be used for manufacturing functional parts, too. Especially, the AM technologies enable the creation of complex and topologically optimised geometries with internal cavities that were impossible to produce with traditional manufacturing processes. However, the tight geometrical tolerances along with the strict surface integrity requirements in aerospace, biomedical and automotive industries are not achievable in most cases with standalone AM technologies. Therefore, AM parts need extensive post-processing to ensure that their surface and dimensional requirements together with their respective mechanical properties are met. In this context, it is not surprising that the integration of AM with post-processing technologies into single and multi set-up processing solutions, commonly referred to as hybrid AM, has emerged as a very attractive proposition for industry while attracting a significant R&D interest. This paper reviews the current research and technology advances associated with the hybrid AM solutions. The special focus is on hybrid AM solutions that combine the capabilities of laser-based AM for processing powders with the necessary post-process technologies for producing metal parts with required accuracy, surface integrity and material properties. Commercially available hybrid AM systems that integrate laser-based AM with post-processing technologies are also reviewed together with their key application areas. Finally, the main challenges and open issues in broadening the industrial use of hybrid AM solutions are discussed.

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Section: The Need For Hybridmentioning

confidence: 99%

Powder-based laser hybrid additive manufacturing of metals: a review

Jiménez

Bidare

Hassanin

et al. 2021

Int J Adv Manuf Technol

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show abstract

“…Surface treatments, such as shot-peening [140], deep-rolling [141] and laser shock peening (LSP) [142] are commonly used to increase the usability of AM materials. For high temperature applications, LSP has additional advantages over other surface treatments due to its ability to impart deep compressive residual stresses [143], lower cold work on the surface [144] and the ability for grain refinements [145,146].…”

Section: Suitability Of Surface Enhancement Processmentioning

confidence: 99%

“…More investigation has to be done to find out the process-structure-propertyperformance relationship, utilising advanced material characterisation method such as EBSD or Transmission Electron Microscopy (TEM). There are other interesting research where LSP is being used as a post-processing step for AM metal components such as aluminium [153], stainless steel [154] and titanium alloy [142]. Kalentics et al [154,155] have proposed using LSP to tailor the residual stresses of stainless steel samples by moving the baseplate back and forth from a printing machine to a LSP station.…”

Section: Suitability Of Surface Enhancement Processmentioning

confidence: 99%

A Critical Review of the Material Characteristics of Additive Manufactured IN718 for High Temperature Application

Yong¹,

Gibbons²,

West³

2020

Preprint

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This paper reviews state of the art Additive Manufactured (AM) IN718 alloy intended for high temperature applications. AM processes have been around for decades and have gained traction in the past five years due to the huge economic benefit it brings to manufacturers. It is crucial for the scientific community to look into AM IN718 applicability in order to see a step-change in the production. Microstructural studies reveal that the grain structure plays a significant role in determining the fatigue lifespan of the material. Controlling IN718 respective phases such as the &upsih;’', δ and Laves phase is seen to be crucial. Literature reviews have shown that the mechanical properties of AM IN718 were very close to its wrought counterpart when treated appropriately. Higher homogenization temperature and longer ageing were recommended to dissolve the damaging phases. Various surface enhancement techniques were examined to find out their compatibility to AM IN718 alloy that is intended for high temperature application. Laser shock peening (LSP) technology stands out due to the ability to impart low cold work which helps in containing the beneficial compressive residual stress it brings in high temperature fatigue environment.

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“…In addition, these chemical techniques have been able to decrease surface roughness with an average and max height improvement of 73% and 65% respectively for ECP [149]. On the other hand, surface treatments such as shot-peening [150], deep-rolling [151] and laser shock peening (LSP) [152] are categorized under no material removal mechanical treatments and are commonly used to increase the usability of AM materials. For high-temperature applications, LSP has additional advantages over other surface treatments due to its ability to impart deep compressive residual stresses [153], lower cold work on the surface [154] and the ability for grain refinements [155,156].…”

Section: Suitability Of Surface Enhancement Processmentioning

confidence: 99%

“…There are interesting initiatives where LSP is being used as a post-processing step for AM metal components such as aluminium [163], stainless steel [164] and titanium alloy [152]. Kalentics et al [164,165] have proposed using LSP to tailor the residual stresses of stainless steel samples by moving the baseplate back and forth from a printing machine to an LSP station.…”

Section: Suitability Of Surface Enhancement Processmentioning

confidence: 99%

A Critical Review of the Material Characteristics of Additive Manufactured IN718 for High-Temperature Application

Yong

Gibbons

Wong³

et al. 2020

Metals

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This paper reviews state of the art additive manufactured (AM) IN718 alloy intended for high-temperature applications. AM processes have been around for decades and have gained traction in the past five years due to the huge economic benefit this brings to manufacturers. It is crucial for the scientific community to look into AM IN718 applicability in order to see a step-change in production. Microstructural studies reveal that the grain structure plays a significant role in determining the fatigue lifespan of the material. Controlling IN718 respective phases such as the ϒ’’, δ and Laves phase is seen to be crucial. Literature reviews have shown that the mechanical properties of AM IN718 were very close to its wrought counterpart when treated appropriately. Higher homogenization temperature and longer ageing were recommended to dissolve the damaging phases. Various surface enhancement techniques were examined to find out their compatibility to AM IN718 alloy that is intended for high-temperature application. Laser shock peening (LSP) technology stands out due to the ability to impart low cold work which helps in containing the beneficial compressive residual stress it brings in a high-temperature fatigue environment.

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Regain the fatigue strength of laser additive manufactured Ti alloy via laser shock peening

Cited by 87 publications

References 39 publications

Powder-based laser hybrid additive manufacturing of metals: a review

Powder-based laser hybrid additive manufacturing of metals: a review

A Critical Review of the Material Characteristics of Additive Manufactured IN718 for High Temperature Application

A Critical Review of the Material Characteristics of Additive Manufactured IN718 for High-Temperature Application

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