使用选择性激光炼制造的不同格子结构的热行为和机械性能
Hui Liu1, Gaoshen Cai1,2, Kai Peng1
1School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Materials (Basel, Switzerland)
|November 27, 2024
概括
这项研究模拟并使用选择性激光化 (SLM) 制造了三种格子结构. 形十二面体 (Dode) 结构表现出最高的余应力,但表现出优越的压缩性能.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 选择性激光化 (SLM) 等增材制造工艺对于创建复杂的格子结构至关重要.
- 了解这些结构在制造过程中的热和机械行为对于优化性能至关重要.
研究的目的:
- 调查加工参数对化池大小和部分孔隙性的影响.
- 模拟和分析体中心立方体 (BCC),面中心立方体 (FCC) 和形十二面体 (Dode) 格子结构中的温度和残余应力分布.
- 在准静态压缩下实验评估制造的格子结构的机械性能.
主要方法:
- 使用数值模拟来研究化池的特性,并预测热量/应力分布.
- 使用选择性激光化 (SLM) 制造了三个不同的格子结构 (BCC,FCC,Dode).
- 进行了近静态压缩实验,以评估机械响应和故障模式.
主要成果:
- 高温集中在三个格子结构的节点和相邻的支柱上.
- 形十二面体 (Dode) 结构表现出最高的残余应力 (1218.2 MPa),其中Z方向应力占主导地位.
- 所有结构在压缩下显示了对角切割故障,而多德结构显示了最佳的压缩性能.
结论:
- 处理参数显著影响SLM中的池大小和多孔性.
- 剩余应力分布在格子结构形成中至关重要,多德结构经历了最高水平.
- 多德格子结构提供了优越的机械压缩性能,尽管残余应力更高.
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