添加对基超级合金GH4065A的固化和同质化的影响
Wenyun Zhang1,2, Linhan Li1,2, Hongyu Su1,3
1High Temperature Materials Research Division, Central Iron & Steel Research Institute, Beijing 100081, China.
Materials (Basel, Switzerland)
|March 14, 2026
概括
将 (Ta) 添加到基于的高级超级合金中,可以提高性能,而不妨碍可制造性. 这项研究表明,Ta稳定了有害的阶段,但优化了同质化,确保了圆盘造的金可加工性.
科学领域:
- 金工程 金工程 金工程
- 材料科学 材料科学 材料科学
- 先进的超级合金是一种超级合金.
背景情况:
- 用于盘造的高合金Ni基超合金面临着由于合金增加而导致微分离和二次相形成的挑战.
- 现有的造加工路线受到这些微观结构复杂性的挑战.
研究的目的:
- 调查添加 (Ta) 对GH4065A超级合金固化和同质化的影响.
- 为了比较一个基合金与5重%的Ta变体 (5Ta合金) 的行为.
主要方法:
- 使用扫描电子显微镜 (SEM) 和电子探针微分析 (EPMA) 进行微结构性表征.
- 差分扫描热量计 (DSC) 用于凝固分析.
- 同质化动力学建模和扩散分析.
主要成果:
- 这种添加稳定了eta (η) 阶段,增加了其凝固温度和分数,但不会改变凝固序列.
- (Nb) 仍然是同质化过程中分离最多的元素,控制动力学,而Ta则分化为MC碳化物和η相.
- 确定了Nb的扩散激活能量,并建立了微分离消除模型,定义了最佳的同质化参数.
结论:
- 战略性添加提高了超级合金的性能,而不会影响制品的制造能力.
- 优化的同质化有效地消除了微分离,并溶解了有害的相.
- 这些发现为先进的磁盘超合金的加工和组合设计提供了指导.
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