在氧气增强的BCC Zr-Hf-Ti-Nb多元元素合金中实现高阻尼能力,具有低Young的模块
Qing Wang1, Zhenhua Wang1, Qixiang Zhang1
1School of Materials Science and Engineering, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian, 116024, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|April 29, 2025
概括
开发了具有增强机械和阻尼性能的新型多主元素合金 (MPEA). 添加氧气提高了这些高温合金的结构稳定性和机械性能.
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.
- 合金设计设计 合金设计
背景情况:
- 多主元素合金 (MPEA) 通过广的组成空间提供可调节的特性.
- 开发具有卓越的机械强度和缓冲能力的MPEA是一个关键的挑战.
研究的目的:
- 开发一种新的增氧体中心立方体 (BCC) - 哈尼 - - 尼奥比 (Zr-Hf-Ti-Nb) MPEAs.
- 研究氧气对这些MPEA的结构稳定性,机械性质和阻尼行为的影响.
主要方法:
- 合金组合设计的公式是 (Zr,Hf,Ti) 15Nb3.
- 纳入不同氧含量的组合.
- 结构稳定性的表征 (BCC-β阶段,沉).
- 评估机械性能 (收益强度,可塑性) 和阻尼能力 (斯模量,损失触角).
主要成果:
- 添加氧气显著提高了Zr-Hf-Ti-NbMPEAs中的BCC-β结构稳定性.
- 最佳合金 (Zr8Hf4Ti3Nb3以1.8%的%O) 由于富含O的集群,表现出优越的机械性能 (1000MPa的强度,15.1%的柔性).
- 在一个广泛的温度范围 (550800 K) 中观察到出色的缓冲能力 (峰值tanδ = 0.02),归因于多个富含氧气的集群.
结论:
- 氧是一种有效的添加剂,可以增强BCC Zr-Hf-Ti-Nb MPEAs的机械和阻尼性能.
- 开发的合金显示出对高温阻尼应用的前景.
- 这项研究为设计具有协同性能改进的先进MPEA提供了一条途径.
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