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在Ni-Co-Cr多元元素合金中,Al诱导了异常的粒度增长
Kexuan Zhou1, Siqi Wu1, Yan Zhou1
1The First Aircraft Institute, Aviation Industry Corporation of China, Xi'an 710089, China.
Materials (Basel, Switzerland)
|February 13, 2026
概括
的添加加快了面中心立方 (FCC) 多主元素合金 (MPEAs) 中的谷物生长. 然而,添加的和会通过增加激活能量来抑制这种快速的谷物生长.
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.
- 物理化学 物理化学
背景情况:
- 替代元素通过固体溶液和第二阶段强化增强面中心立方 (FCC) 多主元素合金 (MPEA) 的机械性能.
- 具有较大的原子半径的合金元素通常会诱导晶格扭曲,阻碍粒度边界迁移以加强矩阵.
研究的目的:
- 为了研究 (Al), (W) 和 (Mo) 对基于Ni-Co-Cr的MPEAs中的谷物生长动力学的影响.
- 阐明这些替代元素影响谷物边界迁移和微观结构演变的机制.
主要方法:
- 系统的回火实验是对MPEA进行的,MPEA含有不同的Al,W和Mo.
- 使用定量谷物生长分析来分析对谷物边界迁移的影响.
- 计算了谷物生长的激活能量,以评估溶解物效应.
主要成果:
- 发现替代Al可以将谷物生长的激活能量降低到219kJ/mol,增强谷物边界的移动性,导致谷物生长异常.
- 轻微添加W和Mo将谷物生长的激活能量提高到251kJ/mol,有效地抑制了Al诱导的谷物快速生长.
- 观察到谷物生长成分 (n) 是2与Al,表明特定的生长机制,而W和Mo导致更高的成分.
结论:
- 替代溶液在MPEA中控制谷物生长动力学方面发挥着至关重要的作用.
- Al促进了谷物边界的移动性,而W和Mo则起到了抑制作用,提供了定制MPEA微观结构的途径.
- 了解这些溶解物效应对于设计具有所需机械性质的MPEA至关重要.
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