Recrystallization behavior of additively manufactured CrNiCo and GRX810 alloys

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2026-04-01 Epub Date: 2026-03-02 DOI:10.1016/j.matchar.2026.116211

Reza Roumina , Trevor Balduck , Andreas Bezold , Michael J. Mills , Smith Timothy , Emmanuelle A. Marquis

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引用次数: 0

Abstract

This study investigated recrystallization behavior and grain growth of additively manufactured oxide dispersion strengthened (ODS) and non-ODS CrNiCo and GRX810 alloys during isothermal annealing at 1100 °C. Microstructural evolution was characterized using EBSD measurements. The presence of Y₂O₃ nano-particles in the ODS alloys effectively suppressed recrystallization and contributed to maintaining a stable microstructure even after 400 h of annealing, as confirmed by TEM observations. In contrast, non-ODS alloys exhibited recrystallization, where the CrNiCo demonstrated faster recrystallization kinetics than GRX810. The slower recrystallization in the GRX810 alloy was attributed to the pinning effect of MC carbides on some grain boundaries. Misorientation analysis revealed a transformation from low-angle to high-angle grain boundaries during the annealing of non-ODS alloys, indicating the formation of new recrystallized grains and twin boundaries. Grain orientation spread (GOS) maps quantified the recrystallized fraction, confirming the inhibition of recrystallization in ODS alloys and the accelerated recrystallization in the non-ODS CrNiCo alloy. The grain growth was limited after prolonged annealing, correlated with the pinning and solute drag effects.

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增材制造CrNiCo和GRX810合金的再结晶行为

研究了添加剂制备的氧化物分散强化（ODS）和非ODS CrNiCo和GRX810合金在1100℃等温退火过程中的再结晶行为和晶粒生长。微结构演变用EBSD测量表征。透射电镜观察证实，纳米Y2O3颗粒的存在有效抑制了ODS合金的再结晶，并有助于在退火400 h后保持稳定的组织。相比之下，非ods合金表现出再结晶，其中CrNiCo表现出比GRX810更快的再结晶动力学。GRX810合金中再结晶较慢的原因是MC碳化物在某些晶界上的钉住作用。错取向分析表明，非ods合金在退火过程中晶界由低角度向高角度转变，形成了新的再结晶晶粒和孪晶界。晶粒取向扩展（GOS）图量化了再结晶分数，证实了ODS合金的再结晶抑制作用和非ODS CrNiCo合金的再结晶加速作用。长时间退火后晶粒生长受到限制，这与钉钉效应和溶质阻力效应有关。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.