Enhanced high-temperature oxidation resistance of Ni-based single crystal superalloys by laser shock peening

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-09-17 DOI:10.1016/j.jmrt.2025.09.145

Wangwang Ding , Busheng Zhang , Jiajun Wu , Xiaodie Cao , Yan Chen , Haoran Gu , Dongxing Zhang , Qiuquan Guo , Yong Sun , Jun Yang

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引用次数: 0

Abstract

The fourth generation of Ni-based single crystal superalloys (Ni-SXs), such as DD91, play a crucial role in aerospace and gas turbines due to their excellent performance at high temperature. To enhance the oxidation resistance and high-temperature performance of Ni-SXs, the laser shock peening (LSP) treatment was employed to introduce the dislocations in their surface, which act as diffusion channels for metal atoms and promote the formation of dense protective oxide layer during oxidation. In this study, XRD, XPS, SEM and TEM analyses were conducted on the cross-section of Ni-SXs to compare the microstructure and oxidation behavior before and after the LSP treatment. The results indicate that surface engineering via the LSP treatment significantly alters the dislocations status of γ/γ՛ phases, consequently influencing the surface oxide layer and oxidation resistance of Ni-SXs. Additionally, the oxidation mechanism of Ni-SXs after the LSP treatment was studied. The understanding developed in this work could be beneficial for the design of the alloys with enhanced oxidation resistance.

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激光冲击强化镍基单晶高温合金的高温抗氧化性能

第四代镍基单晶高温合金（Ni-SXs），如DD91，由于其在高温下的优异性能，在航空航天和燃气轮机中发挥着至关重要的作用。为了提高Ni-SXs的抗氧化性能和高温性能，采用激光冲击强化（LSP）处理，在Ni-SXs表面引入位错，使其成为金属原子的扩散通道，并在氧化过程中促进致密保护氧化层的形成。本研究对Ni-SXs的截面进行了XRD、XPS、SEM和TEM分析，比较了LSP处理前后Ni-SXs的微观结构和氧化行为。结果表明，通过LSP处理的表面工程显著改变了γ/γ 相的位错状态，从而影响了Ni-SXs的表面氧化层和抗氧化性。此外，还研究了Ni-SXs在LSP处理后的氧化机理。本文的研究成果对设计抗氧化性能较好的合金具有一定的指导意义。

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

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.