Performance Improvement of Additively Manufactured Complex Configuration of Polyamide 12

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外文摘要：In this study,to improve the unsatisfactory mechanical properties of polyamide-12 materials formed via selective laser sintering,an independent soaking and rapid cooling device is developed to improve the internal microstruc-tural defects of the materials via sintering.The maximum tensile strength of the material after heat treatment is 57.3±0.5 MPa at the optimum temperature.Meanwhile,its elongation at break is 293％-297％and 22％-25％at-80 ℃ and+80 ℃,respectively.At+80 ℃,its fracture strength and elongation at break are 53.5±3.2 MPa and 539％-582％,respectively.After heat treatment,its maximum bearing capacity of the triply periodic minimal surface(TPMS)in the elastic stage increased significantly by 106％-119％.Among them,the D-type TPMS after heat treatment shows the best comprehensive bearing capacity;the maximum bearing capacity in the elastic stage is 7.2 kN,which is accompanied by favorable thermal insulation.At lower-surface temperatures of+80 ℃ and-80 ℃,the equivalent thermal conductivities are 0.02975 and 0.01592 W/(m·K),respectively.

外文关键词：

3D printing,PA12Heat treatmentMechanical propertiesTPMS

作者：

Yandong Zhao、Meng Li、Jimin Chen、Yong Zeng

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作者单位：

Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing,100124,China

National Key Laboratory of Human Factors Engineering,China Astronaut Research and Training Center,Beijing,100094,China

Beijing Engineering Research Center of 3D Printing for Digital Medical Health,Beijing,100124,China

Key Laboratory of Trans-scale Laser Manufacturing Technology,Ministry of Education,Beijing,100124,China

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出版年：

2024

DOI：

10.1016/j.amf.2024.200165

中国机械工程学报:增材制造前沿(英文)

ISSN：

年,卷(期)：2024.3(4)