Effect of precipitation-forming elements in a near-eutectic Al-Ce alloy for Laser Powder Bed Fusion

• DOI: 10.1016/j.addma.2022.102959
• Publication Date: 2022-06-10T20:53:20Z
• Authors: Marcel Hesselmann; Daniel Knoop; Jérémy Epp; Volker Uhlenwinkel; Axel von Hehl; Anastasiya Toenjes
• Keywords: 0205 materials engineering; 02 engineering and technology

Despite a growing interest in additive manufacturing technologies, there is still limited selection of suitable materials developed regarding the unique non-equilibrium cooling conditions. A highly promising alloy system for Laser Powder Bed Fusion (LPBF) Al-Ce, which shows outstanding processability recent studies. The medium strengths already achievable with binary are to be improved these investigations by additional precipitation-forming elements. By adding Mg and Si, very high tensile strength 593 MPa as-built condition can achieved. XRD measurements show that addition two elements lead formation an AlCeSi phase phases Mg2Si precipitation sequence, affects usually expected eutectic Al11Ce3 phase. Contrary dominance intermetallics, particular identified. content microstructure only significantly increased modified parameter combinations or volume energy inputs. Along this, differences grain size morphology identified EBSD investigations. influence parameters extend different mechanical properties as function applied combinations. With good form wide process windows, used adjust state.