Improvement of high temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloy by selective electron beam melting

Dongdong Zhu; Shiyu Wu; Jiangfei Yan; Jinhu Ju; Duo Dong; Ning Fang; Qibin Wang; Qi Wang; Ruirun Chen

doi:10.1016/j.ijrmhm.2026.107853

Improvement of high temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloy by selective electron beam melting

Dongdong Zhu
, Shiyu Wu
, Jiangfei Yan
, Jinhu Ju
, Duo Dong
, Ning Fang^*
, Qibin Wang^*
, Qi Wang
, Ruirun Chen

^*Corresponding author for this work

TaiZhou University
Harbin University of Science and Technology
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

This study systematically compares the high-temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloys produced by conventional casting and selective electron beam melting (SEBM). The results show that the microstructure of SEBM alloy has higher volume fraction of γ-TiAl phase and finer grain. Isothermal oxidation tests at 800 and 900 °C for 100 h reveal that the oxidation weight gain of the SEBM alloy is 20.7% (800 °C) and 33.2% (900 °C) lower than that of the as-cast alloy. The oxide scale of the oxidized SEBM alloy is thinner, and the content of the protective Al₂O₃ and Ti₂AlN phases is higher. The refined microstructure promotes the formation of a denser and more continuous Al₂O₃ barrier layer during the initial oxidation stage and facilitates the formation of Ti₂AlN phases. This work elucidates the microstructural optimization mechanism of the SEBM process for improving oxidation resistance and provides insights for developing high-performance TiAl alloys via additive manufacturing.

Original language	English
Article number	107853
Journal	International Journal of Refractory Metals and Hard Materials
Volume	139
DOIs	https://doi.org/10.1016/j.ijrmhm.2026.107853
State	Published - Sep 2026
Externally published	Yes

Keywords

Microstructure
Oxidation resistance
Selective electron beam melting
TiAl alloys

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10.1016/j.ijrmhm.2026.107853

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@article{50b8663ca10a40a6bdc32d8a7303c1bb,

title = "Improvement of high temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloy by selective electron beam melting",

abstract = "This study systematically compares the high-temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloys produced by conventional casting and selective electron beam melting (SEBM). The results show that the microstructure of SEBM alloy has higher volume fraction of γ-TiAl phase and finer grain. Isothermal oxidation tests at 800 and 900 °C for 100 h reveal that the oxidation weight gain of the SEBM alloy is 20.7\% (800 °C) and 33.2\% (900 °C) lower than that of the as-cast alloy. The oxide scale of the oxidized SEBM alloy is thinner, and the content of the protective Al2O3 and Ti2AlN phases is higher. The refined microstructure promotes the formation of a denser and more continuous Al2O3 barrier layer during the initial oxidation stage and facilitates the formation of Ti2AlN phases. This work elucidates the microstructural optimization mechanism of the SEBM process for improving oxidation resistance and provides insights for developing high-performance TiAl alloys via additive manufacturing.",

keywords = "Microstructure, Oxidation resistance, Selective electron beam melting, TiAl alloys",

author = "Dongdong Zhu and Shiyu Wu and Jiangfei Yan and Jinhu Ju and Duo Dong and Ning Fang and Qibin Wang and Qi Wang and Ruirun Chen",

note = "Publisher Copyright: {\textcopyright} 2026 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.",

year = "2026",

month = sep,

doi = "10.1016/j.ijrmhm.2026.107853",

language = "英语",

volume = "139",

journal = "International Journal of Refractory Metals and Hard Materials",

issn = "0263-4368",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Improvement of high temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloy by selective electron beam melting

AU - Zhu, Dongdong

AU - Wu, Shiyu

AU - Yan, Jiangfei

AU - Ju, Jinhu

AU - Dong, Duo

AU - Fang, Ning

AU - Wang, Qibin

AU - Wang, Qi

AU - Chen, Ruirun

PY - 2026/9

Y1 - 2026/9

N2 - This study systematically compares the high-temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloys produced by conventional casting and selective electron beam melting (SEBM). The results show that the microstructure of SEBM alloy has higher volume fraction of γ-TiAl phase and finer grain. Isothermal oxidation tests at 800 and 900 °C for 100 h reveal that the oxidation weight gain of the SEBM alloy is 20.7% (800 °C) and 33.2% (900 °C) lower than that of the as-cast alloy. The oxide scale of the oxidized SEBM alloy is thinner, and the content of the protective Al2O3 and Ti2AlN phases is higher. The refined microstructure promotes the formation of a denser and more continuous Al2O3 barrier layer during the initial oxidation stage and facilitates the formation of Ti2AlN phases. This work elucidates the microstructural optimization mechanism of the SEBM process for improving oxidation resistance and provides insights for developing high-performance TiAl alloys via additive manufacturing.

AB - This study systematically compares the high-temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloys produced by conventional casting and selective electron beam melting (SEBM). The results show that the microstructure of SEBM alloy has higher volume fraction of γ-TiAl phase and finer grain. Isothermal oxidation tests at 800 and 900 °C for 100 h reveal that the oxidation weight gain of the SEBM alloy is 20.7% (800 °C) and 33.2% (900 °C) lower than that of the as-cast alloy. The oxide scale of the oxidized SEBM alloy is thinner, and the content of the protective Al2O3 and Ti2AlN phases is higher. The refined microstructure promotes the formation of a denser and more continuous Al2O3 barrier layer during the initial oxidation stage and facilitates the formation of Ti2AlN phases. This work elucidates the microstructural optimization mechanism of the SEBM process for improving oxidation resistance and provides insights for developing high-performance TiAl alloys via additive manufacturing.

KW - Microstructure

KW - Oxidation resistance

KW - Selective electron beam melting

KW - TiAl alloys

UR - https://www.scopus.com/pages/publications/105037906865

U2 - 10.1016/j.ijrmhm.2026.107853

DO - 10.1016/j.ijrmhm.2026.107853

M3 - 文章

AN - SCOPUS:105037906865

SN - 0263-4368

VL - 139

JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

M1 - 107853

ER -

Improvement of high temperature oxidation resistance of Ti-48Al-2Cr-2Nb alloy by selective electron beam melting

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Keywords

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