Development of Al-Alloy Coating for Advanced Nuclear Systems Using Lead Alloys

Kurata, Yoshiyuki; Yokota, H.; Suzuki, Tetsuya

doi:10.1115/1.4005989

Cited by 10 publications

(3 citation statements)

References 14 publications

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“…Hence, it significantly reduces the time required from concept to finished part [5], [6]. Besides forming 3D parts, LSF is also widely used for damaged part repair [4] or surface coating to improve the ability to resist damage [7]. For advanced manufacturing, the advantages of using LSF in surface repair or coating is that it is a kind of local technique and is used where it is required.…”

Section: Introductionmentioning

confidence: 99%

“…Their results show that the protective effect of these coatings against oxidation is greatly enhanced. Kurata et al [7] developed an Al-alloy coating method using Al, Ti, and Fe powders with laser beaming heating to get good corrosion resistance. Wang et al [18] investigated the fabrication of multiple ceramic particle reinforced iron matrix coating by laser cladding, their results show that wear resistance of the composite coatings were significantly improved.…”

Section: Introductionmentioning

confidence: 99%

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Path Generation Method for Aero- Engine Free-Form Surface Blade in Laser Solid Forming

Zhang

Yan²

2019

IEEE Access

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Blade is the critical and extensively used component of aero-engine, which machining quality directly affects engine performance. Due to its flexibility, laser solid forming (LSF) from powders is widely used to synthesis novel materials, build three-dimensional parts, repair damage part and form surface coating in advanced manufacturing. To repair damaged parts or form surface coating, especially for aero-engine free-form surface blade, process of numerical control or robotic LSF is applied in industry. Nevertheless, on account of the complex geometry of the free-form surface, it's quite a challenge to generate proper laser beam paths according to the process requirements of LSF. To address this problem, a path generation method based on the differential geometry is presented. The generated paths can ensure the overlap requirements between deposited tracks as well as paths shifts between adjacent layers. The proposed method has been applied to two examples to verify their validity, and there exists a great potential for the applications in aeroengine manufacturing industry, especially in the LSF repair or surface coating of free-form surface blade.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Path Generation Method for Aero- Engine Free-Form Surface Blade in Laser Solid Forming

Zhang

Yan²

2019

IEEE Access

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“…High-strength aluminum alloy has been widely used in the aerospace industry for its good comprehensive properties [1][2][3][4], however, due to the poor casting properties of the alloy, it is easy to cause segregation, shrinkage, and other defects, and the tendency to hot cracking is serious, to a certain extent, and its fracture toughness is limited. More onerous requirements are being imposed on the strength of aluminum alloy in order to meet the needs of wider application, improving the fracture toughness of the alloy, reducing its tendency to brittle fracture, and controlling catastrophic failures are important problem facing those working with such an alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Micro-scale Y Addition on the Fracture Properties of Al–Cu–Mn Alloy

Guo¹,

Zhang²,

Ding³

et al. 2018

Chin. J. Mech. Eng.

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Rare earth (RE) elements have positive effects on Al alloy, while most research is focused on microstructure and mechanical properties. As important application indices, toughness and plasticity are properties that are sensitive to alloy fracture characteristics, and few research studies have characterized the fracture properties of Al-Cu-Mn alloy on RE elements. The effect of different contents of Y on the fracture properties of Al-Cu-Mn alloy is investigated. T6 heat treatment (solid solution and artificial aging treatment), optical microscope (OM), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) methods are applied to the alloy. Results showed that when Y element is present at 0.1%, the section of the as-cast alloy has smaller sized dimples and the fracture mode presents ductile features. Slight changes in hardness are also observed and maintained at about 60 HV. With increasing content of the RE element Y from 0.1 to 0.5%, the θ phase and Cu atoms in the matrix were reduced and most stopped at Grain boundaries (GBs). Micro-segregation and an enriched zone of Y near the GBs gradually increased. At the same time, the inter-metallic compound AlCuY is aggregated at grain junctions causing deterioration of the micro-structure and fracture properties of the alloy. After T6 treatment, the flatness of the fracture surface was lower than that of all the ascast alloy showing lots of dimples and teared edges with a significant increase in hardness. When Y content was 0.1%, the strength and hardness of the alloy increased due to refinement of the grain strengthening effect. The content of Y elements segregated in the inter-dendritic zone and GBs is reduced. Plasticity and deformation compatibility also improved, making cracks difficult to form and merge with each other along adjacent grain junctions and providing an increased potential for ductile fracture. This paper proposes the addition of RE Y as an effective and prospective strategy to improve the fracture properties of the Al-Cu-Mn alloy and provide a meaningful reference in terms of improving overall performance. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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