具有TPMS结构的Inconel 625合金的变形行为
Kangning Xu1, Jiahui Cao1, Zhiwei Zheng1
1School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200082, China.
Materials (Basel, Switzerland)
|January 25, 2025
概括
使用激光粉床融合制造的IWP三重周期性最小表面 (TPMS) 格子,与其他TPMS设计相比,显示出优越的压力强度和能量吸收. 这种先进的多孔结构为Inconel 625应用提供了更好的机械性能.
科学领域:
- 材料科学与工程 材料科学与工程
- 增材制造 增材制造 增材制造
- 机械工程 机械工程
背景情况:
- 传统的多孔结构表现出诸如应力度和调节能力差等局限性.
- 三重周期性最小表面 (TPMS) 具有固有的优势,如光滑,相互连接和可调节的孔隙性.
- 激光粉床融合 (LPBF) 是一种先进的增材制造技术,适用于创建复杂的晶格结构.
研究的目的:
- 制造和评估Inconel 625 TPMS格子结构的压力性能,具有不同的拓.
- 为了比较原始,IWP,钻石和陀螺TPMS设计的能量吸收能力和机械性能.
- 调查孔隙性对结构完整性和制造格子的机械反应的影响.
主要方法:
- 使用激光粉床融合 (LPBF) 制造Inconel 625 TPMS格子结构.
- 使用阿基米德原则量化理论与伪造卷的量化.
- 样品的单轴压缩测试,通过数值模拟进行验证.
- 对变形机制和孔隙性对机械性能的影响的分析.
主要成果:
- 与Primitive,Diamond和Gyroid相比,IWP网格拓证明了优越的收益强度和能量吸收效率.
- IWP结构呈现出独特的层次失效模式,有助于其增强的机械性能 (收益强度:113.16MPa,弹性模块:735.76MPa,能量吸收:9009.39MJ/m3).
- 毛孔性显著影响了机械性能,70%和80%的毛孔性样本显示出不同的反应.
结论:
- IWP TPMS网格是通过LPBF制造的Inconel 625元件的高效拓,提供了增强的机械性能.
- 由LPBF制成的TPMS结构为传统的多孔材料提供了可行的替代方案,具有针对特定应用的可调性特性.
- 了解变形机制和多孔性效应对于优化TPMS网格的设计和应用至关重要.
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