Applications of unified phase-field methods to designing microstructures and mechanical properties of alloys

IF 4.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Mrs Bulletin Pub Date : 2024-06-03 DOI:10.1557/s43577-024-00720-x

Yuhong Zhao, Tongzheng Xin, Song Tang, Haifeng Wang, Xudong Fang, Hua Hou

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Abstract

This article highlights the applications of integrated unified phase-field methods in guiding the design of high-performance engineering alloys and the optimization of manufacturing processes within an integrated computational materials engineering (ICME) framework. By combining macro process data, solidification, precipitation, and recrystallization conditions, phase-field modeling is used to predict the precipitation, segregation, and crack tendency of NbC as the crack source in austenitic stainless steels, thereby optimizing casting parameters and improving the product qualification rate from 40% to more than 80%. Phase-field modeling is also used to reveal the internal microstructure evolution of Mg–Li-based alloys during spinodal phase separation and help design the Mg–Li–Al alloy with an ultrahigh specific strength (470–500 kN m kg⁻¹) surpassing all engineering alloys. Phase-field simulations of dendritic growth incorporating macro-temperature field and shrinkage defects in solidification allow us to adjust the casting process parameters for optimizing the alloy and casting’s mechanical properties.

Graphical abstract

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统一相场方法在合金微结构和机械性能设计中的应用

本文重点介绍了在集成计算材料工程（ICME）框架内，应用集成统一相场方法指导高性能工程合金设计和制造工艺优化的情况。通过结合宏观工艺数据、凝固、析出和再结晶条件，相场建模被用于预测奥氏体不锈钢中作为裂纹源的 NbC 的析出、偏析和裂纹倾向，从而优化铸造参数并将产品合格率从 40% 提高到 80% 以上。相场建模还用于揭示镁-锂基合金在旋光相分离过程中的内部微观结构演变，并帮助设计出具有超越所有工程合金的超高比强度（470-500 kN m kg-1）的镁-锂-铝合金。结合宏观温度场和凝固过程中的收缩缺陷对树枝状生长进行的相场模拟，使我们能够调整铸造工艺参数，优化合金和铸件的机械性能。

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来源期刊

Mrs Bulletin 工程技术-材料科学：综合

CiteScore

7.40

自引率

2.00%

发文量

193

审稿时长

4-8 weeks

期刊介绍： MRS Bulletin is one of the most widely recognized and highly respected publications in advanced materials research. Each month, the Bulletin provides a comprehensive overview of a specific materials theme, along with industry and policy developments, and MRS and materials-community news and events. Written by leading experts, the overview articles are useful references for specialists, but are also presented at a level understandable to a broad scientific audience.