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使用原子探头断层扫描量化短距离顺序

Mengwei He¹, William J Davids¹, Andrew J Breen¹

¹Australian Centre for Microscopy and Microanalysis, and School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales, Australia.

Nature materials

|July 2, 2024

概括

研究人员开发了一种新的原子探头断层扫描方法,用于测量中高合金中的短距离顺序 (SRO). 该技术量化了热处理期间的SRO变化,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.
计算材料科学科学计算材料科学

背景情况:

中高合金提供了特殊的强度和柔性.
短距离顺序 (SRO) 可以通过计算预测,但很难通过实验来测量.
量化SRO对于了解其对合金性质的影响至关重要.

研究的目的:

开发一种可靠的方法来使用原子探头断层扫描测量合金中的SRO.
研究热处理对CoCrNi合金中的SRO的影响.
为了实现SRO效应的精确计算建模.

主要方法:

利用原子探头断层扫描 (APT) 来量化特定物种的SRO.
开发了一种方法来平衡APT限制与SRO值.
将该方法应用于经过各种热处理的CoCrNi合金.

主要成果:

在CoCrNi.Ni中成功测量了热处理引起的SRO变化.
在APT中保存原子邻里信息的既定制度.
为验证计算模型生成实验性SRO数据.

结论:

开发的APT方法提供了一种可靠的方法来测量SRO.
精确的SRO量化有助于我们更好地了解合金的行为.
这种方法有助于设计先进的中高合金.

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