冷变形对生物相容Ti-Nb-Zr-Ta-Sn-Fe合金的微观结构和机械性能的影响
Vasile Dănuț Cojocaru1, Alexandru Dan1, Nicolae Șerban1
1Faculty of Materials Science and Engineering, National University of Science and Technology Politehnica of Bucharest, 060042 Bucharest, Romania.
Materials (Basel, Switzerland)
|May 25, 2024
概括
本研究研究了一种新的合金 (TNZTSF),以及冷如何影响其微观结构和机械性能. 增加的变形增强了强度,但降低了柔性,为材料设计提供了洞察力.
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.
- 物理金学 物理金学
背景情况:
- 合金对于生物医学和航空航天应用至关重要,因为它们具有有利的特性.
- 了解加工参数对微观结构和机械行为的影响对于合金开发至关重要.
- 冷是一种常见的技术,用于修改金属材料的性能.
研究的目的:
- 研究一种新型Ti-30Nb-12Zr-5Ta-2Sn-1.25Fe (TNZTSF) 合金的微观结构演变和机械性能.
- 研究不同程度的冷变形 (10%60%) 对合金特性的影响.
- 为了将微观结构变化与观察到的机械性质变化相关联.
主要方法:
- 合金合成通过冷感应悬浮在气氛下化.
- 应用冷变形来实现从10%降低到60%的总厚度.
- 使用扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 的微结构分析.
- 通过拉力测试和微硬度测量进行机械性能评估.
主要成果:
- 作为收到的TNZTSF合金表现出一个β-Ti阶段与等粒 (平均尺寸~82.5微米),高强度 (UTS~705.6MPa),和良好的可伸缩性 (延伸~11.1%).
- 冷变形增加了晶体缺陷密度 (子粒边界,失位),提炼了微观结构,提高了强度.
- 60%的冷变形导致UTS为~1192.1 MPa,延长为~7.9%,格子参数略有变化 (a = 3.302(1) Å) 和微链增加.
结论:
- 冷对TNZTSF合金的微观结构和机械性能产生重大影响.
- 增加的冷变形增强了拉伸强度和弹性模量,但由于缺陷积累而降低了柔性.
- 这项研究为优化这种合金在特定应用中的加工提供了有价值的数据.
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