由Ni/Ni3Al多层结构中界面不合适位移网络的分解主导的变形机制
Zhiwei Zhang1,2, Xingyi Zhang1,2, Rong Yang3
1Department of Mechanics and Engineering Sciences, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China.
Materials (Basel, Switzerland)
|August 29, 2024
概括
接口不合位移 (IMD) 网络的分解决定了Ni/Ni3Al多层结构的变形. 这项研究揭示了IMD网络的演变如何影响机械性能,这对于航空航天应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 纳米技术 纳米技术
背景情况:
- 由于其连贯的接口和优越的机械性能,Ni/Ni3Al异质多层结构在航空航天领域至关重要.
- 了解界面变形机制对于优化微结构设计和工程应用至关重要.
研究的目的:
- 确定界面不合适脱位 (IMD) 网络演变与Ni/Ni3Al多层结构中的拉力变形机制之间的关系.
- 为了研究晶体学方向和层厚度对变形行为和产量强度的影响.
主要方法:
- 在拉力变形下对界面不合适脱位 (IMD) 网络演变的分析.
- IMD网络分解与观察到的变形机制的相关性.
- 实验或计算建模,以根据晶体学方向和层厚度确定收益率强度变化.
主要成果:
- IMD网络的分解被确定为Ni/Ni3Al多层结构中占主导地位的变形机制.
- 在Ni/Ni3Al (100) 多层结构中,在3.19 nm的层厚下表现出最大的度强度 (5.28 GPa).
- Ni/Ni3Al (110) 结构在3.01 nm时表现出最大收益强度 (4.35 GPa),而 (111) 结构表现出高,厚度独立的收益强度 (10.8911.81 GPa).
结论:
- IMD网络的分解显著影响了Ni/Ni3Al多层结构的变形机制和机械性能.
- 结晶学方向和层厚度是影响这些材料屈服强度的关键参数.
- 这些发现为IMD网络演变和变形之间的复杂相互作用提供了新的见解,指导航空航天应用的未来材料设计.
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