Grain/phase boundary engineering and high Cr contents enhancing oxidation resistance of dual-phase multi-principal component alloys

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-09-28 DOI:10.1016/j.corsci.2025.113369

Huijie Wei , Ping Huang , Fei Wang

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引用次数: 0

Abstract

The oxidation behavior of dual-phase FeCrNiAlTi multi-principal component alloys (MCAs) with tailored grain/phase boundaries (GBs/PBs) lengths was systematically investigated by isothermal oxidation at 800℃ in air. Experimental results demonstrate that GBs/PBs engineering, when coupled with chemical composition tuning, yields a significant enhancement of oxidation resistance. The alternating distribution of face-centered cubic (FCC) and body-centered cubic (BCC) grains with short interphase distances facilitates lateral oxide growth along boundaries, promoting the formation of a continuous oxide film. Specifically, prolonged GBs/PBs lengths (up to 320.472 mm⁻¹) and high Cr content in BCC phases (54.20 %) accelerate the diffusion kinetics of protective elements (Al/Cr) during initial oxidation, enabling rapid formation of dense, continuous oxidation scales composed of Al₂O₃ and Cr₂O₃. Notably, the continuous Al₂O₃ layer acts as an effective barrier, suppressing subsequent outward Cr diffusion and inward oxygen ingress, thereby decelerating oxidation kinetics (parabolic rate constant k_p = 0.19 ×10⁻³ mg²·cm⁻⁴·h⁻¹) and outperforming many previously reported MCAs. This work highlights that GBs/PBs engineering, coupled with chemical composition adjustment, offers a viable pathway for developing high-performance MCAs for high-temperature structural applications.

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晶界工程和高Cr含量增强了双相多主成分合金的抗氧化性

采用800℃空气等温氧化法，系统研究了不同晶粒/相界长度的双相FeCrNiAlTi多主成分合金（MCAs）的氧化行为。实验结果表明，GBs/PBs工程化与化学成分调整相结合，可以显著提高材料的抗氧化性能。面心立方（FCC）和体心立方（BCC）晶粒交替分布，相间距短，有利于氧化物沿边界横向生长，促进连续氧化膜的形成。具体来说，延长的gb /PBs长度（高达320.472 mm - 1）和BCC相中的高Cr含量（54.20 %）加速了初始氧化过程中保护元素（Al/Cr）的扩散动力学，使Al2O3和Cr2O3组成的致密连续氧化层迅速形成。值得注意的是，连续的Al2O3层作为有效的屏障，抑制随后的Cr向外扩散和氧向内进入，从而减慢氧化动力学（抛物线速率常数kp = 0.19 ×10⁻3 mg2·cm⁻4·h⁻1）并优于许多先前报道的mca。这项工作强调了gb /PBs工程，加上化学成分调整，为开发用于高温结构应用的高性能MCAs提供了一条可行的途径。

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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.