Three-Dimensional Sintering of Two-Component Metal Powders With Stationary and Moving Laser Beams  

Oleh:

Bergman, T. L. ; Buckley, C. W. ; Faghri, A. ; Yuwen, Zhang

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 122 no. 1 (Feb. 2000), page 150-158.
Topik: METAL; three - dimensional; sintering; two - component; metal powders; stationary; moving laser beams

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ90.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Melting and resolidification of a mixture of two metal powders with significantly different melting points under irradiation of a stationary or a moving Gaussian laser beam were investigated numerically and experimentally. The liquid motion driven by capillary and gravity forces as well as the shrinkage of the powder bed caused by the overall density change were taken into account in the physical model. The liquid flow was formulated by using Darcy's law, and the energy equation was given using a temperature transforming model. Prediction were compared with experimental results obtained with nickel braze and AISI 1018 steel powder. The effects of laser properties and the scanning velocity on the laser sintering process were also investigated. An empirical correlation that can be used to predict the cross - sectional area of the heat affected zone is proposed.

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