Effects of ZrC addition on the recrystallization behavior of ZrC-dispersion strengthened FeCrAl alloys

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2024-11-14 DOI:10.1016/j.matchar.2024.114547

Gangming Chen , Yongduo Sun , Hui Wang , Xuefei Huang

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引用次数: 0

Abstract

ZrC-dispersion strengthened FeCrAl (ZrC-FeCrAl) alloy is one of the promising cladding materials for advanced nuclear reactors. The thermal stability of ZrC-FeCrAl alloy is closely associated with its recrystallization behavior. In this study, the effects of different ZrC contents (0–1.5 wt%) on the recrystallization behavior of FeCrAl alloys were investigated. It was found that ZrC addition impedes the recovery and recrystallization processes, with higher ZrC content resulting in higher recrystallization temperatures. Specifically, the addition of 1.5 wt% ZrC increased the recrystallization finishing temperature from 700 °C to 1000 °C. ZrC delays the initiation and completion of recrystallization as well as the onset and termination of grain growth, with higher ZrC content leading to more pronounced delaying effects and extended incubation periods for recrystallization. Furthermore, ZrC influences recovery and recrystallization by affecting the precipitation of M₂₃C₆ and Al₂O₃. ZrC addition also significantly enhances both room-temperature (RT) and high-temperature strength of the alloys. While low ZrC content markedly improves ductility, excessive ZrC content can impair it. The FeCrAl alloy with 0.5 wt% ZrC exhibited the best comprehensive mechanical properties. Moreover, with increasing ZrC content, the fracture mode of the alloy shifts from ductile to brittle fracture.

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添加 ZrC 对 ZrC 分散强化铁铬铝合金再结晶行为的影响

ZrC-分散强化铁铬铝合金（ZrC-FeCrAl）是一种用于先进核反应堆的有前途的包层材料。ZrC-FeCrAl 合金的热稳定性与其再结晶行为密切相关。本研究调查了不同 ZrC 含量（0-1.5 wt%）对铁铬铝合金再结晶行为的影响。研究发现，添加 ZrC 会阻碍复原和再结晶过程，ZrC 含量越高，再结晶温度越高。具体来说，添加 1.5 wt% 的 ZrC 会将再结晶结束温度从 700 °C 提高到 1000 °C。ZrC 可延迟再结晶的开始和完成以及晶粒生长的开始和终止，ZrC 含量越高，延迟效应越明显，再结晶的孵育期也越长。此外，ZrC 还通过影响 M23C6 和 Al2O3 的沉淀来影响恢复和再结晶。添加 ZrC 还能显著提高合金的室温（RT）强度和高温强度。虽然较低的 ZrC 含量可明显改善延展性，但过高的 ZrC 含量则会损害延展性。含 0.5 wt% ZrC 的铁铬铝合金表现出最佳的综合机械性能。此外，随着 ZrC 含量的增加，合金的断裂模式也从韧性断裂转变为脆性断裂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.