Insight into the oxidation behavior and excellent internal oxidation and nitridation resistance of Fe71.5-x(Ni, Cr, Ti)28.5Alx complex concentrated alloys by advanced characterization

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2024-10-28 DOI:10.1016/j.corsci.2024.112544

Jiang Ju , Yimeng Zhao , Zhao Shen , Kai Chen , Bo Xiao , Xia Li , Dongqing Qi , Yilu Zhao , Jun Wang , Baode Sun , Tao Yang

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Abstract

For precipitate-strengthened alloys, the decomposition of the precipitates at the subsurface during high-temperature oxidation is detrimental to mechanical properties. In this study, we adjusted Al concentrations in Fe_71.5-x(Ni, Cr, Ti)_28.5Al_x (x = 8, 12, and 16 at%) complex concentrated alloys (CCAs) to precipitate elongated cuboidal L2₁ with higher density and Al concentration, as well as reduced inter-precipitate spacing. This is more conducive to the rapid diffusion of Al to the matrix and grain boundaries, promoting the formation of a continuous and compact Al₂O₃ layer with random crystallographic orientation at 800 °C in air. This not only inhibits the further decomposition of the L2₁ phase but also avoids internal oxidation and nitridation.

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通过高级表征深入了解 Fe71.5-x(Ni,Cr,Ti)28.5Alx 复合浓缩合金的氧化行为和优异的抗内部氧化和氮化性能

对于沉淀强化合金而言，高温氧化过程中沉淀物在次表层的分解不利于其机械性能。在本研究中，我们调整了 Fe71.5-x(Ni、Cr、Ti)28.5Alx（x = 8、12 和 16%）复合浓缩合金（CCAs）中的铝浓度，以析出具有更高密度和铝浓度的细长立方体 L21，并减小了析出物之间的间距。这更有利于铝向基体和晶界的快速扩散，促进在 800 °C 的空气中形成具有随机晶体取向的连续致密的 Al2O3 层。这不仅抑制了 L21 相的进一步分解，还避免了内部氧化和氮化。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.