在Cu-Zr-Al金属玻璃中的雪崩
Tero Mäkinen1, Anshul D S Parmar2, Silvia Bonfanti2
1Aalto University, Department of Applied Physics, P. O. Box 15600, 00076 Aalto, Espoo, Finland.
Physical review. E
|February 20, 2025
概括
金属玻璃显示压力下降雪崩. 这项对Cu-Zr-Al金属玻璃的研究揭示了在产量点附近的临界雪崩和普遍的产量后行为.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 机械工程 机械工程
背景情况:
- 金属玻璃具有独特的机械性能.
- 金属玻璃中的压力下降类似于雪崩.
- 了解这些雪崩是预测材料行为的关键.
研究的目的:
- 在Cu-Zr-Al金属玻璃中调查压力下降雪崩.
- 分析元素度和冷却速度对机械性能的影响.
- 描述不同压力级别的差距分布和雪崩行为.
主要方法:
- 无气准静态剪切模拟.
- 在Cu-Zr-Al元素度的系统变化.
- 修改纯 Cu-Zr 的冷却速率 (50/50).
主要成果:
- 机械性能与实验发现一致.
- 系统表现出差距分布,在小菌株中具有小的正指数.
- 临界的雪崩行为出现在收益率点附近.
- 产后压力下降证明了普遍性.
- 间隙分布在收成后变得平坦.
结论:
- 这项研究阐明了金属玻璃中压力下降雪崩的性质.
- 结果突出了这些材料中机械行为的普遍特征.
- 这些发现有助于更深入地了解金属玻璃的可塑性和故障机制.
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