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Discrete spot laser...
Discrete spot laser hardening and remelting with a high-brilliance source for surface structuring of a hypereutectoid steel
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- Tricarico, L. (författare)
- DMMM – Politecnico di Bari, viale Japigia 182, Bari, Italy
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- Ancona, Antonio, 1974- (författare)
- Högskolan Väst,Avdelningen för produktionssystem (PS),CNR-IFN UOS Bari, via Amendola 173, 70126 Bari, Italy,PTW
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- Palumbo, G. (författare)
- DMMM – Politecnico di Bari, viale Japigia 182, Bari, Italy
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- Sorgente, D. (författare)
- CNR-IFN UOS Bari, via Amendola 173, Bari, Italy
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- Spina, R. (författare)
- DMMM – Politecnico di Bari, viale Japigia 182, Bari, Italy
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- Lugarà, P.M. (författare)
- CNR-IFN UOS Bari, via Amendola 173, Bari, Italy
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- Engelska.
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Ingår i: Materials & design. - : Elsevier BV. - 0264-1275 .- 1873-4197. ; 115, s. 194-202
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this work the single-pulse laser irradiation of a hypereutectoid steel was investigated using a fiber laser source, in a range of process parameters enabling surface hardening and remelting. Effects of laser power, pulse energy and defocusing distance were investigated using a numerical/experimental approach. Laser surface treatments were conducted on uncoated samples without any gas shielding, changing both the laser power and the pulse energy, and exploring a wide range of defocusing distances. Numerical simulations were conducted using a finite element model calibrated by means of an optimization procedure based on a specific calculation algorithm and using a subset of experimental data producing surface melting. Using both simulations and experiments, the process operating windows of the discrete spot laser treatment were determined: it was found that, when varying the laser power between 250 W and 750 W, melt-free hardened zones are produced with a maximum extension between 0.7 mm and 1.0 mm; on the contrary, in case of more tightly beam focusing conditions, surface melting occurred with a size of the re-melted areas ranging between 1.0 mm and 1.4 mm. Results further showed that a small change (generally 2â3 mm) of the defocusing distance suddenly brings the material from melting to a non-hardening condition. © 2016 Elsevier Ltd
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Nyckelord
- Fiber lasers; Finite element method; Hardening; Laser heating; Melting; Remelting; Steel fibers; Surface structure
- Calculation algorithms; Hypereutectoid steel; Laser hardening; Laser re-melting; Laser surface treatment; Optimization procedures; Process parameters; Surface structuring
- Laser windows
- Manufacturing and materials engineering
- Produktions- och materialteknik
- Production Technology
- Produktionsteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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