AISI 321 不锈钢 TiC 基自修复涂层热冲击行为的实验和模型研究

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design Pub Date : 2024-10-01 DOI:10.1016/j.matdes.2024.113353

Wei Li , Chipeng Zhang , Shunpeng Zhu , Cong Li , Guowei Bo , Shengnan Hu , Dapeng Jiang , Hui Chen , Jianjun He , Shengde Zhang , Anqi Chen , Jian Chen

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引用次数: 0

摘要

在高温下使用的 AISI 321 钢结构件在使用过程中通常会受到氧化和热冲击损伤。因此，为了提高 321 钢的高温抗氧化性和抗热震性，本研究为 321 钢制备了由 Al2O3-13 %TiO2 层、TiC 层和 NiCrAlY 层组成的自修复涂层。实验和微观结构表征结果表明，这种自愈合涂层的抗热震性与对应的双AT13涂层相比有显著提高。这是因为 TiC 与氧气之间的氧化反应产生的体积增量降低了自修复涂层的孔隙率，延缓了裂纹的生长，从而提高了高温抗氧化性。此外，还建立了基于巴黎公式裂纹生长模型的热冲击寿命模型。建模结果不仅与实验结果吻合，而且还表明热生长氧化物（TGO）的增厚是裂纹产生和增长的主要原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Experimental and modeling investigation of the thermal shock behavior of TiC-based self-healing coatings on AISI 321 stainless steel

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Experimental and modeling investigation of the thermal shock behavior of TiC-based self-healing coatings on AISI 321 stainless steel

The AISI 321 steels of structural components serviced at high temperature are usually subjected to oxidation and thermal shock damage during service. Therefore, to improve their high-temperature oxidation and thermal shock resistance, the self-healing coating consisting of Al₂O₃-13 %TiO₂ layer, TiC layer and NiCrAlY layer was prepared for 321 steels in this work. The experimental and microstructural characterization results showed that the thermal shock resistance of such self-healing coating was remarkably improved as compared to the counterpart double-AT13 coating. This is because the volume increment resulting from the oxidation reaction between the TiC and oxygen decreased the porosity of the self-healing coating and retarded crack growth, which also led to the improved high-temperature oxidation resistance. Further, a thermal shock life model based on the crack growth model of Paris formula were developed. The modeling results not only agreed well with the experimental results but also indicated that thickening of thermal grown oxide (TGO) is the main cause of crack initiation and growth.

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.