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首页> 外文期刊>Journal of Materials Engineering and Performance >Precipitation Behavior of sigma-FeCr Phases in Hastelloy C-2000 Superalloy Under Plastic Deformation and Aging Treatment
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Precipitation Behavior of sigma-FeCr Phases in Hastelloy C-2000 Superalloy Under Plastic Deformation and Aging Treatment

机译：塑性变形和时效处理下哈氏合金C-2000合金中σ-FeCr相的析出行为

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摘要

Precipitation behavior and structural feature of the sigma-FeCr phase in Hastelloy C-2000 alloy under plastic deformation and aging treatment are investigated using scanning electron microscopy, transmission electron microscope, and x-ray diffraction. The plate-shaped sigma-FeCr phase can precipitate in the alloy by plastic deformation and aging treatment because of the increase of both defect density and heterogeneity of alloying elements. This phase is distributed along the interface between matrix and deformation twins. The appearance of unidirectional faults on surface of the sigma-FeCr phase indicates that it may be a metastable-phase. Because of the precipitation of the brittle sigma-FeCr phase and the increase of defects' density such as dislocation and deformation twins in the matrix, mechanical properties of the alloy are improved remarkably.
机译：利用扫描电子显微镜，透射电子显微镜和X射线衍射研究了哈氏合金C-2000合金在塑性变形和时效处理下的σ-FeCr相的析出行为和结构特征。由于缺陷密度和合金元素异质性的增加，板状sigma-FeCr相可以通过塑性变形和时效处理在合金中沉淀。该相沿矩阵孪晶和形变孪晶之间的界面分布。 σ-FeCr相表面上出现单向断层表明它可能是亚稳相。由于脆性σ-FeCr相的析出以及基体中位错和变形孪晶等缺陷密度的增加，合金的机械性能得到了显着改善。

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