Failure analysis of TiNbCr Multi-Principal element Alloy: Temperature-Dependent oxidation and internal degradation in oxygen atmospheres

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-04-01 DOI:10.1016/j.engfailanal.2025.109573

Isabela Dainezi , Brian Gleeson , Carlos Alberto Della Rovere

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引用次数: 0

Abstract

This study presents a failure analysis of a TiNbCr multi-principal element (MPE) alloy, focusing on its temperature-dependent oxidation behavior and internal degradation mechanisms in oxygen atmospheres. Thermal gravimetric analysis (TGA) conducted at varying temperatures revealed distinct oxidation mechanism: at 700 °C, a dense oxide layer formed; at 800 °C, a complex mixture of Nb, Ti, and Cr oxides was observed; and at 900 and 1000 °C, an innermost Cr₂O₃-rich layer developed, imparting improved oxidation resistance. Despite these temperature-dependent variations, the scaling kinetics of the alloy remained linear, with extensive internal oxidation observed at all exposure temperatures. In contrast, alloy 188 exhibited parabolic scaling kinetics and lower mass gain per unit area, demonstrating better oxidation resistance. The persistent presence of an internal reaction zone (IRZ) suggests that the oxide scale fails to act as an effective diffusion barrier, promoting internal degradation and increasing the risk of structural failure in high-temperature applications. Moreover, a comparison with previous studies suggests that the presence of nitrogen accelerates oxidation kinetics while reducing IRZ depth, affecting long-term material stability. These findings provide critical insights into oxidation-induced failure mechanisms, aiding in the development and selection of high-temperature alloys for aerospace, energy, and structural applications.

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.