Lasers in Surface Engineering

Garrido, Alberto Higuera; González, R.; Cadenas, M.; Wang, Chinpei; Sadeghi, Farshid

doi:10.1002/9781118562857.ch7

Cited by 3 publications

(1 citation statement)

References 42 publications

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“…Liquid phase surface engineering by means of laser beams, including surface melting, alloying, and cladding, is an appropriate and promising method for improving hardness, corrosion, and wear resistance of aluminum alloys [1][2][3][4][5][6][7]. In laser surface alloying, alloying elements are pre-or co-depositionally added to the surface-melted layer.…”

Section: Introductionmentioning

confidence: 99%

Effect of pulsed Nd:YAG laser re-melting on chromium surface alloyed AA6061-T6 aluminum

Ansari

Sohi

Soltani

et al. 2015

Int J Adv Manuf Technol

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In this work, in situ formation of Al-Cr intermetallic compound on the surface of AA6061-T6 aluminum pre-placed chromium powder via pulsed Nd:YAG laser surface alloying was investigated. The effect of laser re-melting on microstructure and hardness of the treated layers was examined. Laser re-melting resulted in a significant reduction in the presence of cracks, pores, and undissolved Cr-rich particles along with a more uniform distribution of intermetallic compounds. The results showed that the alloyed layers mainly consisted of fine Al 7 Cr and Al 4 Cr intermetallic compounds in an α-Al solid solution matrix with cellular and dendritic morphologies. Hardness profiles along cross section and top surface of the alloyed layers indicated that laser re-melting enhanced homogeneity and increased the hardness value to more than six times of that of the base material.

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