Femtosecond Laser Ablation of a Single Crystal Superalloy CMSX-4 in Different Environments

Abstract:

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The femtosecond laser ablation has been investigated on second generation single crystal superalloy CMSX-4 using a commercial titanium:sapphire laser system (λ = 780nm, τ = 120 fs). The ablation thresholds of bulk alloy CMSX-4 have been determined as a function of the pulse number (1, 10, 100, 1000) in air, argon gas and vacuum. The results indicate that the multiple-pulse threshold of this material decreased with increasing the pulse number in all the cases. For the same pulse number, the threshold changed in the descending order: air, vacuum and argon gas. The incubation coefficient in air has been determined: ξ = 0.86 ± 0.03. The preliminary results showed the better quality of femtosecond laser machining of CMSX-4 in vacuum and argon gas than in air.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

1309-1312

DOI:

10.4028/www.scientific.net/MSF.546-549.1309

Citation:

Q. Wen et al., "Femtosecond Laser Ablation of a Single Crystal Superalloy CMSX-4 in Different Environments", Materials Science Forum, Vols. 546-549, pp. 1309-1312, 2007

Online since:

May 2007

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$35.00

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