老化处理对TC18合金微观结构和机械性能的影响
Song Zhang1, Yong-Cheng Lin1,2,3, Li-Hua Wang1
1Light Alloy Research Institute, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|April 9, 2024
概括
老化处理显著影响TC18合金的微观结构和机械性能. 优化二次阿尔法相沉平衡了强度和可塑性,这对于先进的材料应用至关重要.
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.
- 合金是一种合金.
背景情况:
- TC18合金是航空航天和工程应用中的关键材料.
- 了解热处理对微观结构和性能的影响对于材料优化至关重要.
研究的目的:
- 为了研究老化处理参数对TC18合金微观结构的影响.
- 分析结果对拉伸性能和故障机制的影响.
- 为了建立微观结构进化和机械性能之间的相关性.
主要方法:
- 老化温度和时间的系统变化.
- 微结构分析侧重于初级 (αp) 和二级 (αs) α相.
- 拉力测试用于评估收益率强度 (YS),最终拉力强度 (UTS) 和柔性.
- 失效机制分析. 失效机制分析.
主要成果:
- 初级αp阶段的大小和形态在很大程度上不受老化参数的影响.
- 老化温度和时间显著影响二次α相 (αs) 降水,粗化和网络形成.
- 收益强度 (YS) 和最终抗拉强度 (UTS) 均表现出初始增加,随后随着变化的老化条件下下降.
- 灵活性呈现相反的趋势,最初下降,然后增加.
- 在强度和柔性之间实现了最佳平衡,YS范围从1238.6到1381.6MPa,UTS范围从1363.2到1516.8MPa.
结论:
- 二次α相 (αs) 的厚度决定了材料的强度.
- 阿尔法相 (α) 的含量会影响材料的柔性.
- 粗的αs阶段增强了软性特征.
- 老化处理促进了αs相的沉和均分布,使TC18合金在强度和可塑性之间保持平衡.
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