在增材制造的316L不钢中,划分脱位细胞结构之间的超低误导
Fei Sun1, Yoshitaka Adachi1, Kazuhisa Sato2
1Department of Material Design Innovation Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
Materials (Basel, Switzerland)
|April 27, 2024
概括
在激光粉床融合 (LPBF) 处理的316L不钢中,亚微位移细胞结构表现出极低的误导. 传输电子显微镜 (TEM) 精确地测量这些误导,为纳米结构材料提供了洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 增材制造 增材制造 增材制造
背景情况:
- 激光粉床融合 (LPBF) 处理316L不钢的结果是亚微位移细胞结构.
- 这些结构会影响强度-柔性平衡,原因是高密度的位移和细胞边界的分离元素.
- 了解相邻细胞结构之间的误导对于材料性质预测至关重要.
研究的目的:
- 为了研究和准确测量LPBF加工的316L不钢中细胞结构之间的超低误导.
- 为了比较传统电子反射散射衍射 (EBSD),传输基库奇衍射 (TKD) 和传输电子显微镜 (TEM) 测量这些误导的有效性.
- 提供关于纳米结构材料具有超细粒度微观结构的特征的见解.
主要方法:
- 使用常规的电子反射散射衍射 (EBSD) 和传输基库奇衍射 (TKD) 进行初始误导分析.
- 使用高分辨率传输电子显微镜 (TEM) 精确测量异位细胞之间的误导.
- 在LPBF加工的316L不钢中,在快速固化过程中形成的分析细胞结构.
主要成果:
- 传统的EBSD和TKD提供了2°以下的误导角度,分辨率取决于样品质量和扫描参数.
- TEM分析显示,相邻的脱位细胞之间的准确误导角度低于1°.
- 证明TEM为测量细胞结构中超低误导提供了卓越的空间分辨率和精度.
结论:
- 在LPBF加工的316L不钢中,TEM是用于测量LPBF加工的316L不钢中脱位细胞之间的超低误导 (<1°) 的首选和更精确的方法.
- 准确测量这些误导对于理解变形机制和材料特性至关重要.
- 这些发现为表征具有超细粒度微观结构的纳米结构金属和合金提供了宝贵的见解.
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