Laser powder bed fusion of nano-titania modified AlSi10Mg alloy: Mechanical properties and strengthening mechanisms

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-02-27 DOI:10.1016/j.vacuum.2025.114202

Peng Qi , Deyang Liu , Guanglong Ren , Zihan Zhao , Zhichao Wang , Zhichao Dong , Lijuan Zhang

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引用次数: 0

Abstract

The application of laser powder bed fusion (LPBF) prepared Al matrix alloy is usually hindered by severe coarse column grains and insufficient mechanical properties. This work introduced nano-TiO₂ particles as a novel grain refiner and reinforced phase to control such phenomena in the LPBF-fabricated (LPBF-ed) AlSi10Mg alloy. The addition of TiO₂ was optimized to achieve the reinforcement of AlSi10Mg alloy. Results show that adding nano-TiO₂ particles can decrease the average grain size and consequently eliminate the pores in nano-TiO₂/AlSi10Mg alloy, and the combination of in-situ formed L1₂-Al₃Ti, TiO₂ nanoparticles and Al matrix is quite tight. The LPBF-ed TiO₂/AlSi10Mg alloy has demonstrated a remarkable improvement in mechanical properties, with a tensile strength of 482 MPa and ductility of 14 %, surpassing most previously reported LPBF-ed AlSi10Mg with the addition of second phases. The cooperative effects of pores elimination, grain refinement, pinning effect, and precipitation strengthening of nanophase are considered to be responsible for their excellent mechanical properties, making the LPBF-ed TiO₂/AlSi10Mg alloy a potential standout in its application field.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.