含ru镍基高温合金γ′晶格中高温蠕变诱导的占位演化

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Letters Pub Date : 2023-09-13 DOI:10.1080/21663831.2023.2254910

Yunsong Zhao, Na Li, Li Wang, Junyang He, Weihong Liu, Min Song

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引用次数: 0

摘要

通过使用最先进的表征技术，包括原子探针断层扫描和原子分辨元素映射，我们成功地探测了第四代含钌镍基高温合金在1100℃蠕变过程中与γ′成分变化相关的位点占据演变。结果表明，W和Ru在蠕变破裂后仍保持不变的位置偏好，而Co、Ta和Re等元素在γ′晶格中α-和β-位置的偏好减弱。这表明γ′有序度总体降低，从而可能导致平面断层能降低，进一步促进了γ′位错剪切。

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High-temperature creep-induced site occupation evolution in the γ′ lattice in a Ru-bearing Ni-based superalloy

By using state-of-the-art characterisation techniques including atom probe tomography and atomic resolved elemental mapping, we successfully probed the site occupation evolution associated with composition change in γ′, during 1100°C creep of a fourth generation Ru-bearing Ni-based superalloy. It is quantified that, W and Ru maintain unchanged site preference after creep rupture, while interestingly, the rest elements especially Co, Ta and Re show a weakened preference at both α- and β-sites in the γ′ lattice. This indicates the overall reduced γ′ ordering degree and thus the possible decrease in planar fault energies, which further facilitates dislocation shearing in γ′.

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来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.