添加剂制造的316L不钢的变形行为使用现场中子衍射
Zhiping Chen1,2,3, Zhenjun Jiang1, Fuzhu Wang1
1Research Institute of Interdisciplinary Science, School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China.
Scientific reports
|January 24, 2025
概括
316L不钢的选择性激光化 (SLM) 显示打印方向对机械性能产生重大影响. 由于异型微结构的发展,XOY打印的部件比XOZ打印的部件 (<600 MPa) 具有更高的抗拉强度 (700 MPa).
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 增材制造 增材制造 增材制造
背景情况:
- 选择性激光化 (SLM) 等增材制造 (AM) 技术越来越多地用于金属元件制造.
- 316L不钢 (316LSS) 是工业应用中广泛使用的材料,因为它具有良好的性能.
- 了解AM生产材料的机械和微观结构行为对于其可靠的应用至关重要.
研究的目的:
- 调查印刷方向对SLM制造的316LSS机械和微结构反应的影响.
- 为了比较XOY和XOZ方向打印的316LSS元件的拉伸性能.
- 阐明微观结构进化和异构拉伸行为之间的关系.
主要方法:
- 选择性激光化 (SLM) 用于制造XOY和XOZ方向的316LSS样品.
- 现场中子衍射拉伸试验在室温下进行,以分析机械和结构变化.
- 微结构性特征集中在纳米尺寸的穴,双边界和格子常数.
主要成果:
- 在XOY方向打印的样品达到约700MPa的抗拉强度.
- 在XOZ方向打印的样本具有较低的抗拉强度,小于600MPa.
- 观察到拉伸性质的异质性,归因于纳米,双边界和格子常数的变化.
结论:
- 在SLM期间的打印方向显著影响316LSS的抗拉强度和微观结构发展.
- 优化打印方向对于在增材制造的金属零件中实现所需的机械性能至关重要.
- 对控制微结构异构的进一步研究可以增强SLM加工的316LSS的应用.
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