循环固溶处理对2.3 GPa马氏体时效钢无析出区和纳米析出相的调节

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-09-02 DOI:10.1016/j.matchar.2025.115522

Xin Liu, Meng Zhang, Kaiyu Zhang, Wanliang Zhang, Hongxing Zhou, Chengshuang Zhou, Lin Zhang

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引用次数: 0

摘要

系统研究了循环固溶处理对2.3 GPa马氏体时效钢组织和力学性能的影响。与常规热处理相比，马氏体时效钢的强度提高了100 MPa，伸长率提高了12.6%。循环固溶处理使马氏体基体细化29.9%，使奥氏体体积分数提高约2%。循环固溶温度越低，断口处的剪切唇所占比例越大，韧窝越小、密度越大。首次发现循环固溶处理温度可以调节无析出区的形成。无析出区显著降低了马氏体时效钢的强度，影响了马氏体时效钢的析出强化。双时效处理使纳米析出相的体积分数提高了10.7%，提高了材料的强度。从强度模型中发现，位错以剪切方式移动，其中η-Ni3Ti相为主要强化相。为开发和研究高强度马氏体时效钢，拓宽马氏体时效钢的应用领域开辟了新的途径。

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Regulating the precipitation-free zone and nano-precipitation phase by cyclic solution treatment in 2.3 GPa maraging steel

This paper systematically studies the effect of cyclic solution treatment on the microstructure and mechanical properties of 2.3 GPa maraging steel. Compared to conventional heat treatment, the strength of maraging steel increased by 100 MPa and the elongation improved by 12.6 %. Cyclic solution treatment refined the martensitic matrix by 29.9 % and increased the austenite volume fraction by about 2 %. The lower the cyclic solution treatment temperature, the larger the proportion of shear lips at the fracture, and the smaller and denser the dimples. It was first discovered that the cyclic solution treatment temperature can regulate the formation of the precipitation-free zone. The precipitation-free zone significantly reduces the strength of maraging steel and affects the precipitation strengthening of maraging steel. The double aging treatment increased the volume fraction of the nano-precipitated phase by 10.7 % and improved the strength of the material. From the strength model, it was found that dislocations moved through a shear mechanism, with the η-Ni₃Ti phase being the primary strengthening phase. This work opens up a new path for developing and researching higher-strength maraging steels and broadening the applications of maraging steels.

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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.