In situ formation of D022-Al3Ti during selective laser melting of nano-TiC/AlSi10Mg alloy prepared by electrostatic self-assembly

In this present work, a novel electrostatic self-assembly method was invented to produce AlSi10Mg powders homogeneously decorated with TiC nanoparticles. The TiC/AlSi10Mg alloy with homogenous, crack-free, equiaxed and super fine-grained were produced using selective laser melting (SLM). The in-situ...

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Veröffentlicht in:Vacuum 2021-06, Vol.188, p.110179, Article 110179
Hauptverfasser: Fan, Zhenhua, Yan, Xingchen, Fu, Zhiyong, Niu, Ben, Chen, Junfu, Hu, Yongjun, Chang, Cheng, Yi, Jianglong
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Sprache:eng
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Zusammenfassung:In this present work, a novel electrostatic self-assembly method was invented to produce AlSi10Mg powders homogeneously decorated with TiC nanoparticles. The TiC/AlSi10Mg alloy with homogenous, crack-free, equiaxed and super fine-grained were produced using selective laser melting (SLM). The in-situ formation of D022-Al3Ti created by TiC and Al matrix during SLM was revealed at the first time and both TiC and D022-Al3Ti nanoparticles were extremely effective inoculant for an SLMed AlSi10Mg alloy. Therefore, the SLMed TiC/AlSi10Mg alloy exhibited a high tensile strength (ultimate tensile strength ~ 456 MPa, yield strength ~338 MPa) and high microhardness (131 HV0.05), which were higher than the SLMed AlSi10Mg alloy (ultimate tensile strength ~437 MPa, yield strength ~254 MPa and microhardness ~113 HV0.05). This study can be regarded as a guidance in the fabrication of metal matrix nanocomposites using for SLM. [Display omitted] •Electrostatic self-assembly method is used to produce nano-TiC/AlSi10Mg powders.•In-situ formation of D022-Al3Ti phase within SLM SLMed TiC/AlSi10Mg alloy was found.•SLMed TiC/AlSi10Mg alloy showed better mechanical properties than SLMed AlSi10Mg alloy.
ISSN:0042-207X
1879-2715
DOI:10.1016/j.vacuum.2021.110179