Stephanie C. Leone. Review of ""When All of Rome Was Under Construction": The Building Process in Baroque Rome" by Dorothy Metzger Habel.

Leone, Stephanie C.

doi:10.3202/caa.reviews.2014.2

Cited by 2 publications

(2 citation statements)

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“…In last years, there is growing interest in the use of pulsed Nd:YAG lasers for precision cutting of thin sheet metals and for those applications in which narrow kerf widths, small HAZ and complex cut profiles are required. Most of the researchers have varied one parameter at a time to investigate the effect of different parameters such as laser power, pulse width, pulse frequency, cutting speed, type and pressure of assist gas on the different output characteristics for the different category of materials, such as metals, non-metals, composites and ceramics [13][14][15][16][17][18][19][20]. In this paper the laser cutting, by a solid state Nd:YAG laser, of thin AA 2024 sheets coated with a pure titanium cold sprayed layer was studied.…”

Section: Introductionmentioning

confidence: 99%

Laser Cutting of Aluminium Sheets with a Superficial Cold Spray Titanium Coating

Astarita

Genna

Leone

et al. 2014

KEM

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In the manufacturing of metal components both wear and corrosion have to be considered. In particular, corrosion is a primary problem in the aeronautic field, where the aluminium alloys are affected by several corrosion typologies. Furthermore, nowadays carbon fibre reinforced plastics (CFRP) are finding an increasing use, but they can induce galvanic corrosion phenomena when coupled with aluminium alloys. To overcome this problem, corrosion resistant coatings are used on aluminium components. On these premises, the realization of a titanium coating on aluminium components could allow the coupling of CFRP and aluminium alloys, improving the corrosion resistance. Cold Spray Deposition is a recent technology to realize these coatings. This technology allows the production of near fully dense coatings on metallic surfaces. In many applications the coated aluminium sheets have to be machined (cut or drilled). Machining with conventional cutting methods leads to both tool wear and damages in the coating. Laser cutting represents a promising alternative: it does not involve any mechanical cutting force or tool wear and, thanks to the small laser beam spot, it allows to realize complex shapes. In this paper, laser cutting of an Al alloy sheet (0.6 mm thick) coated with Ti Alloy, was studied. The adopted laser source was a 150 W, lamp pumped Nd:YAG, specifically developed for micro-machining operations on metals. During the tests, the process parameters (cutting speed, pulse duration and entrance side) were changed and the kerf geometry was analysed as a function of the process parameters.

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Section: Introductionmentioning

confidence: 99%

Laser Cutting of Aluminium Sheets with a Superficial Cold Spray Titanium Coating

Astarita

Genna

Leone

et al. 2014

KEM

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“…Laser cutting offers several advantages over conventional cutting methods. It includes narrow kerf width (minimum material lost), straight cut edges, low roughness of cut surfaces, minimum metallurgical and surface distortions, easy integration with computer numerically controlled (CNC) machines for cutting complex profiles and importantly noncontact nature of the process (suitable for cutting in hostile environments and in areas with limited access) [3][4].…”

Section: Introductionmentioning

confidence: 99%

Ti-6Al-4V Cutting by 100W Fibre Laser in Both CW and Modulated Regime

Astarita

Genna

Leone

et al. 2013

KEM

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Titanium and its alloys are nowadays widely used in many sectors: in the medical field (orthopedic and dental ones), in the architectural field, in the chemical plants field and in aeronautic [1]. In this last field it is more and more used both for its contribution to make lightweight and time durable structures and for its compatibility with new materials, first of all Carbon Fiber Reinforced Plastics (CFRP). Cutting of titanium sheets is one of the primary requirements in the fabrication of most of the components. Laser cutting offers several advantages over conventional cutting methods. It includes narrow kerf width (minimum material lost), straight cut edges, low roughness of cut surfaces, minimum metallurgical and surface distortions, easy integration with computer numerically controlled (CNC) machines for cutting complex profiles and importantly non-contact nature of the process (suitable for cutting in hostile environments and in areas with limited access) [2]. However, due to very limited literature available on laser cutting of titanium, it is very difficult to predict the cut surface quality and optimum process parameters for laser cutting, especially when dross-free cuts are required. Laser cutting of titanium and titanium alloys needs to be carried out with an inert gas, this due to the high reactivity of the titanium with the oxygen at high temperatures [3]. However when the available power is limited, as in the present case, the use of a reactive gas (air) can help to achieve cutting speed value reasonable for industrial applications. The aim of this work is to study the cutting of Ti-6Al-4V rolled sheets 1 mm in thickness, by means of a 100 W fibre laser, (SPI-Red Power) working at wavelength  = 1090 nm. The maximum cutting speed were measured in both CW and pulsed regime at different mean power and different duration. Furthermore, the kerf geometry and the heat affected zone (HAZ) were studied decreasing the cutting speed from the maximum to the 80 % of this values. The results obtained showed that both the power and the cutting speed influence the cutting kerf geometry and HAZ. In particular the synergy of power and speed, resulting roughly into the heat input, seems to rule the whole cutting process.

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Stephanie C. Leone. Review of ""When All of Rome Was Under Construction": The Building Process in Baroque Rome" by Dorothy Metzger Habel.

Cited by 2 publications

References 0 publications

Laser Cutting of Aluminium Sheets with a Superficial Cold Spray Titanium Coating

Laser Cutting of Aluminium Sheets with a Superficial Cold Spray Titanium Coating

Ti-6Al-4V Cutting by 100W Fibre Laser in Both CW and Modulated Regime

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