高温和超重力应力作用下γ′相缺陷的形成

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

Materials Characterization Pub Date : 2025-05-20 DOI:10.1016/j.matchar.2025.115202

Mengyuan Han , Debin Zhao , Hao Fan , Junbo Zhao , Wenshuai Wang , Xiaoyi Yuan , Haibo Long , Hua Wei , Shengcheng Mao , Lihua Wang , Ze Zhang , Xiaodong Han

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引用次数: 0

摘要

γ′相缺陷决定了高温合金的失效。研究了高温和超重力应力作用下γ′相缺陷的形成过程。在超重力试样的顶部形成位错对。在超重力试样的底部，除了位错对外，还形成了单个位错和层错。相比之下，与超重力试验处理时间相同的蠕变断裂试样中主要形成位错对。它的密度也远低于超重力测试样品的密度。对缺陷的Burgers向量进行了标定，并讨论了缺陷的形成机理。

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The formation of the defects in γ′ phase under the high temperature and super-gravity stress

The defects in the γ′ phase determine the failure of the superalloy. This study investigated the formation of the defects in γ′ phase under high temperature and super-gravity stress. The dislocation pairs are formed in the top section of the super-gravity test sample. In the bottom section of the super-gravity test sample, the single dislocation and stacking faults are formed in addition to the dislocation pairs. By comparison, it is mainly the dislocation pair formed in the creep rupture sample, which has the same treatment time as the super-gravity test. Its density is also much lower than that of the super-gravity test sample. The Burgers vectors of the defects are calibrated, and their formation mechanisms are discussed.

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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.