Elevated temperature mechanical properties of TiCN reinforced AlSi10Mg fabricated by laser powder bed fusion additive manufacturing

This short communication presents 2–4 μm sized TiCN reinforced AlSi10Mg composites (TiCN/AlSi10Mg) fabricated by laser powder bed fusion (LPBF) with refined Al-Si eutectic microstructure consisting of equiaxed bi-modal α-Al grains and enhanced elevated temperature tensile strength. The formation mec...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2021-04, Vol.811, p.141025, Article 141025
Hauptverfasser:	He, Peidong, Kong, Hui, Liu, Qian, Ferry, Michael, Kruzic, Jamie J., Li, Xiaopeng
Format:	Artikel
Sprache:	eng
Schlagworte:	Additive manufacturing Aluminum base alloys Aluminum metal matrix composites Elevated temperature mechanical properties High temperature Laser powder bed fusion Mechanical properties Microstructure Nucleation Powder beds Rapid prototyping Silicon Tensile strength Thermal stability Titanium carbonitride
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Beschreibung
Zusammenfassung:	This short communication presents 2–4 μm sized TiCN reinforced AlSi10Mg composites (TiCN/AlSi10Mg) fabricated by laser powder bed fusion (LPBF) with refined Al-Si eutectic microstructure consisting of equiaxed bi-modal α-Al grains and enhanced elevated temperature tensile strength. The formation mechanism of reported bi-modal structure is related to the modified temperature gradients and induced heterogeneous nucleation in LPBF. The enhancement in elevated temperature tensile strength is mainly attributed to refined bi-modal Al-Si microstructure and thermal stability of TiCN particles.
ISSN:	0921-5093 1873-4936
DOI:	10.1016/j.msea.2021.141025