Microstructural pattern formation during eutectoid transformation in multicomponent steels

多元钢共析转变过程中微观结构图案的形成

• 批准号: 314490367
• 负责人: Professorin Dr. Britta Nestler, since 3/2020
• 金额: --
• 依托单位: Institut für Angewandte Materialien - Mikrostruktur-Modellierung und Simulation (IAM-MMS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/314490367?language=en
• 关键词: Microstructural; pattern; formation; during; eutectoid

The eutectoid transformation in steels has been the topic of many theoretical and experimental investigations ever since pearlite was first discovered in the 18th century. In view of establishing a synergy between theory and experiments, the phase-field method holds great promise in terms of its ability to describe the interface evolution at the mesoscale and diffusion time scale. In this project, we will couple the phase-field approach with CALPHAD to numerically investigate interesting 3-D microstructural patterns such as, divorced eutectoid and divergent pearlite in commercial steels. We also propose to investigate the mechanisms by which, pearlitic lamellae tilt as they cross grain boundaries. The primary objective of the research project is to advance the understanding of the complex evolution pathways during the eutectoid transformation, which has profound implications for the eventual optimization of the process control parameters related to heat treatment of multicomponent steels.

自18世纪珠光体首次被发现以来，钢中的共析转变一直是许多理论和实验研究的主题。考虑到建立了理论和实验之间的协同，相场方法在描述介观尺度和扩散时间尺度上的界面演化方面大有希望。在这个项目中，我们将把相场方法与CALPHAD相结合，对工业钢中有趣的三维组织模式，如离异共析和发散珠光体进行数值研究。我们还建议研究珠光体片层在越过晶界时倾斜的机制。该研究项目的主要目的是促进对共析转变过程中复杂演化路径的理解，这对最终优化多组元钢热处理相关的过程控制参数具有深远的意义。

项目成果

Limitations of preserving volume in Allen-Cahn framework for microstructural analysis

• DOI: 10.1016/j.commatsci.2019.109388
• 发表时间: 2020-02-15
• 期刊: COMPUTATIONAL MATERIALS SCIENCE
• 影响因子: 3.3
• 作者: Amos, P. G. Kubendran;Schoof, Ephraim;Nestler, Britta
• 通讯作者: Nestler, Britta

Phase-field analysis of quenching and partitioning in a polycrystalline Fe-C system under constrained-carbon equilibrium condition

• DOI: 10.1016/j.commatsci.2018.12.023
• 发表时间: 2019-03-01
• 期刊: COMPUTATIONAL MATERIALS SCIENCE
• 影响因子: 3.3
• 作者: Amos, P. G. Kubendran;Schoof, Ephraim;Nestler, Britta
• 通讯作者: Nestler, Britta

Distinguishing interstitial and substitutional diffusion in grand-potential based phase-field model

• DOI: 10.1016/j.mtla.2020.100820
• 发表时间: 2020-08-01
• 期刊: MATERIALIA
• 影响因子: 3.4
• 作者: Amos, P. G. Kubendran;Nestler, Britta
• 通讯作者: Nestler, Britta

Influence of stress-free transformation strain on the autocatalytic growth of bainite: A multiphase-field analysis

无应力相变应变对贝氏体自催化生长的影响：多相场分析

• DOI: 10.1016/j.mtla.2020.100620
• 发表时间: 2020
• 期刊: Materialia
• 影响因子: 3.4
• 作者: E Schoof;P G Kubendran Amos;D Schneider;B Nestler
• 通讯作者: B Nestler

Multiphase-field modelling of concurrent grain growth and coarsening in complex multicomponent systems

• DOI: 10.1016/j.jmst.2019.11.011
• 发表时间: 2020-05
• 期刊: Journal of Materials Science & Technology
• 影响因子: 10.9
• 作者: P. Amos;Ramanathan Perumal;M. Selzer;B. Nestler