在溶液处理过程中不同的加热和冷却速率对AA7050合金电线的微观结构和性能的影响
Xinyu Gao1,2,3, Guanjun Gao1,3,4, Zhihui Li1,3
1State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China.
Materials (Basel, Switzerland)
|January 23, 2024
概括
快速加热和水火显著提高AA7050合金电线的性能. 这种方法提炼了颗粒大小,并增加了强化阶段,在T6和T73条件下产生了优越的强度.
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.
- 合金开发 合金开发
背景情况:
- 在航空航天应用中,AA7050合金至关重要.
- 优化溶液处理是提高合金性能的关键.
- 了解热处理对微观结构的影响至关重要.
研究的目的:
- 为了研究 AA7050合金电线在溶液处理过程中加热和冷却速度的影响.
- 为了将微观结构变化与机械性质变化相关联.
- 为了确定最佳的加工参数,以提高合金强度.
主要方法:
- 拉伸测试用于机械性能评估.
- 用于微观结构分析的金属学显微镜.
- 电子背散衍射 (EBSD) 和传输电子显微镜 (TEM) 用于详细的微观结构特征.
主要成果:
- 与缓慢加热相比,快速加热导致更细,更均的再结晶的颗粒大小.
- 由于溶解物原子和核化位点的增加,水火促进了h'强化阶段的更高密度.
- 与空气冷却样本相比,在T6和T73状态下,水 AA7050合金在T6和T73状态下表现出更高的抗拉强度.
- 水的火导致了纳米级集群,并抑制了连续降水,与空气冷却观察到的粗沉不同.
结论:
- 在溶液处理过程中加热和冷却速度极大地影响AA7050合金的微观结构和性能.
- 快速加热与水火相结合,是提高AA7050合金电线强度的有效策略.
- 观察到的微观结构改进,特别是强化阶段的密度,与增加的机械强度直接相关.
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