老化温度对新型β合金的微观结构和机械性能的影响
Wei Xiang1,2, Wuhua Yuan1, Hao Deng2
1College of Materials Science and Engineering, Hunan University, Changsha 410082, China.
Materials (Basel, Switzerland)
|December 9, 2023
概括
老化温度对TB18合金的微观结构和机械性能产生了重大影响. 较高的老化温度增加了α相粒径,影响了拉伸强度和性,与Hall-Petch关系一致.
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.
- 机械工程 机械工程
背景情况:
- 高强度的元稳ββ合金对于航空业至关重要.
- 为了达到高强度,需要固体溶液处理和低温老化,以形成细α沉物.
- 老化温度是影响这些合金机械性能的关键因素.
研究的目的:
- 研究老化温度对新型TB18合金 (Ti-4.5Al-5Mo-5V-6Cr-1Nb) 的微观结构和机械性能的影响.
- 了解不同老化温度下的α相的行为.
- 提供热处理策略的见解和TB18的理论分析.
主要方法:
- 在870°C进行固体溶液处理,然后在510°C,520°C,530°C和540°C进行老化处理.
- 使用扫描电子显微镜 (SEM) 和传输电子显微镜 (TEM) 的微结构分析.
- 机械性能测试,包括抗拉强度,率强度和冲击性.
主要成果:
- 老化温度显著影响了α相粒宽,从510°C的60nm增加到540°C的140nm.
- 拉力强度,屈服强度和冲击性随着老化温度而变化,具体值为510°C和540°C报告.
- 在拉力性能,α相粒宽度和Hall-Petch关系之间观察到强烈的相关性.
结论:
- 老化温度是控制TB18合金微观结构和机械性能的一个关键参数.
- 拉伸性能和α相粒宽度之间的观察到的关系支持了Hall-Petch关系.
- 这项研究为优化航空航天应用中的TB18合金热处理过程提供了宝贵的数据.
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