在同质化和老化后,H111热AA5754的微结构特征,tribological和腐蚀行为
Otman Farj Mohammed Abukhdair1, Ismail Esen1, Hayrettin Ahlatci2
1Mechanical Engineering Department, Karabuk University, Karabuk 78050, Turkey.
Materials (Basel, Switzerland)
|July 13, 2024
概括
热处理显著影响热AA5754合金的性能. 老化增强了硬度和耐磨性,但损害了腐蚀行为,而预处理提高了耐腐蚀性.
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.
背景情况:
- 热合金广泛应用于各种行业.
- 了解热处理对合金性能的影响对于优化性能至关重要.
- AA5754合金的微观结构演变影响其机械和化学特性.
研究的目的:
- 研究热AA5754合金在经过不同热处理 (同质化和老化) 后的微观结构变化.
- 评估这些处理对耐磨性和腐蚀性行为的影响.
- 为了将微观结构进化与观察到的属性变化相关联.
主要方法:
- 使用光学显微镜进行微结构分析,观察颗粒结构和沉物分布.
- 硬度测试 (布林尔硬度) 用于评估机械强度.
- 磨损测试用于确定在特定距离上减轻重量和磨损率.
- 腐蚀测试用于测量体重损失和电化学参数 (腐蚀潜力,电流密度).
主要成果:
- 老化处理导致细颗粒和粗颗粒的增加,导致硬度最高 (86.83 HB).
- 在热处理前的合金表现出最差的耐磨性和最大的体重损失.
- 在热处理之前的合金表现出最佳的腐蚀行为,腐蚀率最低 (0.39 × 10−3 mg/dm2·day) 和有利的腐蚀潜力.
- 老化的合金表现出最糟糕的腐蚀行为,体重损失显著增加,腐蚀潜力不太好.
结论:
- 热处理,特别是老化,显著改变热AA5754合金的微观结构,硬度和耐磨性.
- 虽然老化改善了硬度和耐磨性等机械性能,但它对耐腐蚀性产生了不利影响.
- 在热处理之前的状态与同质化或老化状态相比,提供了优越的耐腐蚀性.
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