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热处理LPBFNiTi形状记忆合金的机械反应和功能性能
Jerzy Ratajski1, Błażej Bałasz1, Agnieszka Peła1
1Faculty of Mechanical and Power Engineering, Koszalin University of Technology, 75-453 Koszalin, Poland.
Materials (Basel, Switzerland)
|February 13, 2026
概括
溶液处理和老化显著改变了激光粉床融合 (LPBF) 产生的NiTi合金性能. 这些处理可以控制变形机制和相变,从而为各种应用提供量身定制的功能性质.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 增材制造 增材制造 增材制造
背景情况:
- - (NiTi) 合金对于需要形状记忆和超弹性的应用至关重要.
- 激光粉床融合 (LPBF) 为制造复杂的NiTi组件提供了一种新的途径.
- 了解对LPBF NiTi的后处理影响对于性能优化至关重要.
研究的目的:
- 调查溶液处理和老化对通过LPBF制造的NiTi合金的影响.
- 为了将微观结构进化和相变换与机械行为相关联.
- 建立一个框架,为特定的功能应用量身定制LPBF NiTi.
主要方法:
- 在室温 (RT) 和低温 (LT) 的拉力测试.
- 差分扫描热量计 (DSC) 用于热力学分析.
- 用X射线衍射 (XRD) 和传输电子显微镜 (TEM) 来进行微观结构的表征.
主要成果:
- 作为制造的 (AF) NiTi表现出结合和马氏体塑性与抑制的应力诱导的马氏体 (SIM).
- 溶液处理 (ST) 可以恢复可逆SIM和部分可恢复性.
- 老化 (A1h,A20h) 诱导Ni4Ti3沉,稳定马氏体,并导致不可逆转的变形.
结论:
- 从可恢复到消散和不可逆转的功能连续性行为是基于后处理证明.
- 通过溶液处理和老化进行微结构控制是定制LPBFNiTi属性的关键.
- 这项研究为设计执行器和能源管理系统的NiTi组件提供了机械的理解.
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