Table 2 Material parameters for single track scan example [21]
From: On phase change and latent heat models in metal additive manufacturing process simulation
Parameter | Description | Value | Unit |
|---|---|---|---|
\(\rho _h\) | Hemispherical reflectivity | 0.7 | − |
\(\beta _h\) | Extinction coefficient | 60 | mm\(^{-1}\) |
\(c_p\) | Heat capacity, powder | 2.98 | \(\nicefrac {\hbox {MJ}}{\hbox {m}^3\hbox {K}}\) |
\(c_s\) | Heat capacity, solid | 4.25 | \(\nicefrac {\hbox {MJ}}{\hbox {m}^3\hbox {K}}\) |
\(c_m\) | Heat capacity, melt | 5.95 | \(\nicefrac {\hbox {MJ}}{\hbox {m}^3\hbox {K}}\) |
\(k_p(T)\) | Conductivity, powder | 0.2@200, 0.3@1600 | \(\nicefrac {\hbox {W}}{\hbox {mK}}@\hbox {K}\) |
\(k_c\) | Conductivity, solid/melt | 20 | \(\nicefrac {\hbox {W}}{\hbox {mK}}\) |
\(T_m\) | Melting temperature | 1700 | K |
\(h_m\) | Latent heat of fusion | 2.18 | \(\nicefrac {\hbox {GJ}}{\hbox {m}^3}\) |