**E**ff**ect of Fe Addition on Heat-Resistant Aluminum Alloys Produced by Selective Laser Melting**

**Shigeto Yamasaki 1,\*, Tomo Okuhira 1, Masatoshi Mitsuhara 1, Hideharu Nakashima 1, Jun Kusui 2 and Mitsuru Adachi 3**


Received: 26 March 2019; Accepted: 20 April 2019; Published: 22 April 2019

**Abstract:** The effect of Fe addition on the high-temperature mechanical properties of heat-resistant aluminum alloys produced by selective laser melting (SLM) was investigated in relation to the alloy microstructures. Fe is generally detrimental to the properties of cast aluminum alloys; however, we found that Fe-containing alloys produced by SLM had improved high-temperature strength and good ductility. Microstructural observations revealed that the increase in the high-temperature strength of the alloys was due to the dispersion of fine rod-shaped Fe-Si-Ni particles unique to the SLM material instead of the cell-like structure of eutectic Si.

**Keywords:** aluminum alloys; selective laser melting; high-temperature deformation; microstructure
