尼铁-双金属结构 通过电缆弧进行制造 增材制造
Shalini Singh1, Elena Demidova2, Natalia Resnina2
1Mechatronics and Instrumentation Laboratory, Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Indore 453552, Madhya Pradesh, India.
Materials (Basel, Switzerland)
|March 13, 2024
概括
这项研究优化了将尼醇 (NiTi) 形状记忆合金 (SMA) 与铜 (Cu) 结合,使用线弧增材制造 (WAAM). 在500°C进行12小时的热处理,恢复了功能性质,并增强了高级应用的机械强度.
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:
- 形状记忆合金 (SMA),特别是尼醇 (NiTi),为高级应用提供独特的功能性质.
- 将NiTi与铜 (Cu) 等其他材料集成,在保持合金性能方面存在挑战.
- 新的连接技术对于克服整合障碍和释放材料潜力至关重要.
研究的目的:
- 通过电弧增材制造 (WAAM) 研究NiTi与Cu的集成.
- 分析NiTi/Cu双金属结的界面特征和功能性质.
- 确定最佳的热处理参数,以恢复和提高NiTi/Cu联合性能.
主要方法:
- 电线弧增材制造 (WAAM) 用于在Cu上的NiTi沉积.
- 扫描电子显微镜 (SEM),X射线衍射 (XRD) 和差分扫描热量计 (DSC) 用于接口分析.
- 控制的热处理实验以优化马氏体转变和机械性能.
主要成果:
- 确定了一个复杂的界面混合区,包含各种Ti,Ni,Cu2,Cu,Ti2和Ni,Cu3以及富含Ni的NiTi沉物.
- 最初的DSC结果显示,由于广泛的,低强度的峰值,在证明功能性质方面存在挑战.
- 在500°C进行12小时的热处理成功地恢复了明显的转变峰值,并改善了NiTi层的分布.
- 优化的接头实现了485 HV的微硬度和高达650 MPa的压力强度.
结论:
- WAAM是一种可行的技术,用于创建NiTi/Cu双金属结构.
- 沉积后的热处理对于恢复NiTi/Cu接头的功能性质至关重要.
- 优化的NiTi/Cu接头具有显著的机械强度,可用于各种电机械应用.
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