在高透CoCrFeNiCux合金的接中固化和液化裂变
Ping Yu1, Sindo Kou1, Chun-Ming Lin2
1Department of Materials Science and Engineering, University of Wisconsin, Madison, WI 53706, USA.
Materials (Basel, Switzerland)
|August 26, 2023
概括
高 CoCrFeNiCux合金在接过程中经历了裂纹,特别是含铜量较高的合金. 一个新的指数准确地预测了这种易感性,有助于合金设计.
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.
- 接工程 接工程
背景情况:
- 高合金 (HEA) 具有独特的特性,但它们的接性,特别是关于裂纹,需要进行彻底的研究.
- 铜 (Cu) 等特定元素对高温电池的固化行为和裂纹易感性的影响尚未完全理解.
研究的目的:
- 研究不同铜含量 (x ≈ 0, 0.5, 1, 1.5, 和 2) 对弧CoCrFeNiCux高合金的固化裂变和液化裂变的影响.
- 评估拟议的指数的适用性,以预测这些合金中的固化裂变易感性.
主要方法:
- 弧是在具有不同铜摩尔比的CoCrFeNiCux合金上进行的.
- 进行了微结构分析,以确定裂纹形成 (固化和液化裂纹) 以及富含铜的阶段的存在.
- 一个最近提出的指数,dT/df) 1/2 靠近 (f) 1/2 = 1,用于评估裂纹易受性.
主要成果:
- 在合金的聚变区中观察到固化裂变,其Cu分子比为x ≈ 0.5,1和1.5.
- 在裂周围发现了富含铜的液化和固化产品,在度较高的Cu度下,患病率增加.
- 液化裂变在部分融化区域开始,并传播到聚变区域.
- 拟议的裂变易受性指数显示,x ≈ 0.5,1.0 和 1.5 的合金的价值较高,与观察到的裂变有很好的相关性.
结论:
- 铜含量显著影响CoCrFeNiCux高合金的接性,在中间度 (x ≈ 0.51.5) 促进裂纹.
- 观察到的裂变是液化和固化裂变的组合,与富铜相的形成有关.
- 评估的指数可以作为这些先进合金中固化裂变易感性的可靠预测指标.
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