SS 316 粉末电磁轴向压实的有限元模拟

IF 1.9 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Powder Metallurgy Pub Date : 2024-01-15 DOI:10.1177/00325899231214683

Nadimetla Thirupathi, S. Kore

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引用次数: 0

摘要

电磁轴向粉末压制（EMAPC）利用强磁场高速压制粉末冶金部件。在 EMAPC 中，洛伦兹力加速冲头压实粉末。因此，高磁场会在微秒内导致粉末变形。因此，测量压实高度、磁场分布和压实速度非常困难。没有文献报道过 EMAPC 的有限元 (FE) 建模。因此，我们开发了基于 LS-DYNA 多物理场求解器的 FE 三维模型来研究 SS316s EMAPC。在不同的放电能量下，对圆柱形 SS316 样品进行了 EMAPC 模拟。通过模拟预测了粉末压制样品的最终变形。为了确定压制样品的特性，对烧结样品进行了密度、孔隙率和显微硬度研究。使用光学显微镜对压制样品进行了显微检查。增加放电能量可降低高度、增加密度和显微硬度。FE 分析可用于优化 EMAPC 工艺参数，以获得粉末致密性和孔隙率。

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Finite element simulation of electromagnetic axial powder compaction of SS 316 powder

Electromagnetic axial powder compaction (EMAPC) uses strong magnetic fields to compact powder metallurgy components at high speeds. Lorentz forces accelerate the punch to compact powder in EMAPC. Thus, high magnetic fields cause powder deformations in microseconds. Therefore, measuring the compact height, magnetic field distribution, and compaction velocity was difficult. No literature has reported EMAPC finite element (FE) modeling. Thus, an LS-DYNA multi-physics solver-based FE 3D model has been developed to study SS316s EMAPC. A cylindrical SS316 sample was simulated for EMAPC at various discharge energies. The powder-compressed sample's final deformation was predicted through simulation. To characterize compacted samples, sintered samples were studied for density, porosity, and microhardness. Compressed samples were microscopically examined using optical microscopy. Increased discharge energy lowers height, increases density, and microhardness. FE analysis can be used to optimize EMAPC process parameters for powder compact density and porosity.

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来源期刊

Powder Metallurgy 工程技术-冶金工程

CiteScore

2.90

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： Powder Metallurgy is an international journal publishing peer-reviewed original research on the science and practice of powder metallurgy and particulate technology. Coverage includes metallic particulate materials, PM tool materials, hard materials, composites, and novel powder based materials.