Effect of TiB2 Addition on Microstructure and Mechanical Properties of AA8009 Alloy Fabricated by Laser Additive Manufacturing

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外文摘要：The research involves the addition of 5 vol.％TiB2 particles into AA8009 alloy powder to synthesize TiB2/AA8009 composite parts produced via laser powder bed fusion(LPBF).The addition of the TiB2 particles causes the TiB2/AA8009 composites with and without annealing have lower compressive strength than AA8009 alloy due to the change of the strengthening mechanism.The results further indicated that solid solution strengthening was the main strengthening mechanism of the LPBF AA8009 alloy at room temperature whereas Orowan strengthening became the primary strengthening factor after annealing at 673 K.In contrast,Orowan strengthening always remained the main strengthening mechanism for the TiB2/AA8009 composite,irrespective of the annealing temperature.In addition,after annealing of the LPBF parts at 673 K,the compressive yield strength(CYS)of the unblended AA8009 alloy specimens had a～2.5 times greater reduction(from 705±16 to 459±30 MPa)compared to that of the composite TiB2/AA8009 samples(from 466±23 to 368±3 MPa).There-fore,TiB2 particles can suppress the drop in yield strength of LPBF AA8009 alloy below 673 K,providing a theoretical and experimental basis for the applications of both LPBF AA8009 and TiB2/AA8009 alloys at low and medium temperatures.

外文关键词：

Laser powder bed fusionAA8009 alloyMicrostructureMechanical properties

作者：

Xinxing Xiong、Sijie Yu、Pei Wang、Junfang Qi、Haichao Li、Xulei Wang、Michael Ryan、Debajyoti Bhaduri、Rossitza Setchi

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作者单位：

Additive Manufacturing Institute,Shenzhen University,Shenzhen 518060,China

Henan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,China

School of Materials Science and Engineering,Shanghai University of Engineering Science,Shanghai 201620,China

School of Materials Science and Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China

High-Value Manufacturing Research Group,School of Engineering,Cardiff University,Cardiff CF24 3AA,UK

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基金：

国家自然科学基金Stable Support Plan Program of Shenzhen Natural Science FundGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research Foundation

项目编号：

52105385202208101325370012020A15151108692022A1515010781

出版年：

2024

DOI：

10.1007/s40195-023-01615-7

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(1)

参考文献量37