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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Bibliographic Details
Published 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
Main Authors: He, Peidong, Kong, Hui, Liu, Qian, Ferry, Michael, Kruzic, Jamie J., Li, Xiaopeng
Format: Article
Language:English
Subjects:
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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Summary: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