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Question: c in selective laser melting slm steel powder is deposited...

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(c) In Selective Laser Melting (SLM) steel powder is deposited on a build platform and is melied by a fibre iaser. Calculate the energy required to melt 1ec of steel powder using the following quantities. The density of steel The melting point of steel Average specific heat capacity of steel 7800kg/m 1515 C 620 J/kg K The latent heat of fusion for steel Ambient temp Absorbtivity of the laser 247 J/g 20 ° C 0.4 Compare this to the energy used in the SLM process using the following parameters. Laser Power 200 W Exposure 3.00E-04 s Point dist 7.00E-05 m Scan spacing 1.00E-04 m Layer Thickness 50E-06 m [10marks]
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