1998 / DB reference year
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Author Niu, H J. Chang, I T H. Institution Univ of Birmingham, Birmingham, UK
Source Scripta Materialia. v 39 n 1 Jun 5 1998. p 67-72.
Abstract The effect of the selective laser sintering (SLS) processing parameters on the morphology and microstructure of M3/2 high speed steels was studied. The SLS of M3/2 high speed steels resulted in both liquid phase and supersolidus liquid phase sintering. The formation of agglomerates on the surface and at the necklace carbide along the grain boundaries was explained by the model of Rayleigh instability. The agglomerate size increased with increasing laser power or decreasing scan rate. The carbide transformed from the angular carbide at the three grain junction to a necklace microstructure along the grain boundaries with increasing laser power from 6.25 to 25.00 W for the given scan rate of 1 mm/s. [References: 10] XX