碳化物和气孔对镍基单晶超合金局部变形的影响

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Rengeng Li , Yu Zhang , Haoyi Niu , Hao Wang , Hao Wu
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引用次数: 0

摘要

碳化物和孔隙对镍基单晶超合金在变形过程中的开裂倾向起着至关重要的作用。本研究通过原位拉伸变形实验研究了碳化物和孔隙周围的变形机制和局部应变演变行为。研究结果表明,单晶合金在拉伸变形过程中很容易激活多重滑移系统。此外,碳化物中的应变定位受到其形态的影响,棒状和片状碳化物在变形过程中出现裂纹的可能性增加。孔隙附近的应变局部化明显更强烈,因此这些区域特别容易出现裂纹。因此,我们的研究为通过控制碳化物形态和孔隙形成来提高镍基单晶超级合金的机械性能提供了理论基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of carbides and pores on the localized deformation of nickel-based single-crystal superalloys

The carbides and pores play a critical role in the cracking tendencies of nickel-based single-crystal superalloys during deformation. In the present study, the deformation mechanism and local strain evolution behavior around carbides and pores were studied through in-situ tensile deformation experiments. The findings indicate that multiple slip systems are easily activated during tensile deformation in single-crystal alloys. Furthermore, the strain localization in carbides is influenced by their morphology, with rod-like and flake-like carbides demonstrating an increased likelihood of cracking during deformation. The strain localization adjacent to pores is markedly more intense, rendering these areas particularly susceptible to cracking. Our work therefore offers a theoretical foundation for enhancing the mechanical properties of nickel-based single-crystal superalloys by controlling carbide morphology and pore formation.

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来源期刊
CiteScore
8.60
自引率
2.10%
发文量
2812
审稿时长
49 days
期刊介绍: Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.
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