High-temperature oxidation behavior of SLM-processed and forged GH5188 Co-based superalloy

Chao Yang; Xue Chen; Yusheng Tian; Yifeng Tang; Shiping Cai; Wei Wei; Qianli Huang; Hang Guo; Aihui Huang; Paul K. Chu

doi:10.1016/j.smmf.2025.100093

High-temperature oxidation behavior of SLM-processed and forged GH5188 Co-based superalloy

Chao Yang (Co-first Author)
, Xue Chen (Co-first Author)
, Yusheng Tian
, Yifeng Tang
, Shiping Cai
, Wei Wei^*
, Qianli Huang^*
, Hang Guo
, Aihui Huang^*
, Paul K. Chu

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

6 Citations (Scopus)

3 Downloads (CityUHK Scholars)

Abstract

The high-temperature oxidation behavior of GH5188 cobalt-based superalloy, fabricated via selective laser melting (SLM) and forging, is investigated to elucidate the impact of additive manufacturing on oxidation resistance. SLM-processed samples exhibit a hierarchical microstructure with nanoscale carbides (∼80 nm) pinned at cellular boundaries (100 nm to micrometer scale), contrasting with the equiaxed grains (∼10 μm) and coarse W-rich M₆C carbides (∼5 μm) in forged samples. After isothermal oxidation at 1000 °C and 1100 °C for 200 h, SLM samples show significantly lower mass gains compared to forged samples (69 % and 75 % of forged values), attributed to enhanced oxide scale adhesion and stability. Cyclic oxidation at 1000 °C for 50 cycles reveals stable mass gains in SLM samples (37 % of forged value) with minimal cracking, while forged samples suffer severe spallation due to volatile WO₃ formation from coarse carbides. This study demonstrates that SLM's refined microstructure suppresses deleterious carbide decomposition, offering a novel strategy to enhance the oxidation resistance of Co-based superalloys for aerospace and high-temperature applications. © 2025 The Authors.

Original language	English
Article number	100093
Number of pages	14
Journal	Smart Materials in Manufacturing
Volume	3
Online published	13 Sept 2025
DOIs	https://doi.org/10.1016/j.smmf.2025.100093
Publication status	Published - 2025

Funding

This work was supported by the National Natural Science Foundation of China (Nos. 51931003 and 52401101 ), and China Postdoctoral Science Foundation (Nos. 2024T170557 , 2023M742224 , and 2020M680223 ), Postdoctoral Fellowship Program of CPSF under Grant Number GZC20231545 , Shanghai Post-doctoral Excellence Program (No. 2023440 ), as well as City University of Hong Kong Donation Research Grants (DON-RMG Nos. 9229021 and 9220061 ).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

Co-based superalloy
High-temperature oxidation
Microstructure refinement
Oxidation resistance
Selective laser melting

Publisher's Copyright Statement

This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

RGC Funding Information

RGC-funded

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10.1016/j.smmf.2025.100093

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@article{34071b28d7684735871cd78bba9a4ccf,

title = "High-temperature oxidation behavior of SLM-processed and forged GH5188 Co-based superalloy",

abstract = "The high-temperature oxidation behavior of GH5188 cobalt-based superalloy, fabricated via selective laser melting (SLM) and forging, is investigated to elucidate the impact of additive manufacturing on oxidation resistance. SLM-processed samples exhibit a hierarchical microstructure with nanoscale carbides (∼80 nm) pinned at cellular boundaries (100 nm to micrometer scale), contrasting with the equiaxed grains (∼10 μm) and coarse W-rich M6C carbides (∼5 μm) in forged samples. After isothermal oxidation at 1000 °C and 1100 °C for 200 h, SLM samples show significantly lower mass gains compared to forged samples (69 \% and 75 \% of forged values), attributed to enhanced oxide scale adhesion and stability. Cyclic oxidation at 1000 °C for 50 cycles reveals stable mass gains in SLM samples (37 \% of forged value) with minimal cracking, while forged samples suffer severe spallation due to volatile WO3 formation from coarse carbides. This study demonstrates that SLM's refined microstructure suppresses deleterious carbide decomposition, offering a novel strategy to enhance the oxidation resistance of Co-based superalloys for aerospace and high-temperature applications. {\textcopyright} 2025 The Authors.",

keywords = "Co-based superalloy, High-temperature oxidation, Microstructure refinement, Oxidation resistance, Selective laser melting",

author = "Chao Yang and Xue Chen and Yusheng Tian and Yifeng Tang and Shiping Cai and Wei Wei and Qianli Huang and Hang Guo and Aihui Huang and Chu, \{Paul K.\}",

year = "2025",

doi = "10.1016/j.smmf.2025.100093",

language = "English",

volume = "3",

}

TY - JOUR

T1 - High-temperature oxidation behavior of SLM-processed and forged GH5188 Co-based superalloy

AU - Yang, Chao

AU - Chen, Xue

AU - Tian, Yusheng

AU - Tang, Yifeng

AU - Cai, Shiping

AU - Wei, Wei

AU - Huang, Qianli

AU - Guo, Hang

AU - Huang, Aihui

AU - Chu, Paul K.

PY - 2025

Y1 - 2025

N2 - The high-temperature oxidation behavior of GH5188 cobalt-based superalloy, fabricated via selective laser melting (SLM) and forging, is investigated to elucidate the impact of additive manufacturing on oxidation resistance. SLM-processed samples exhibit a hierarchical microstructure with nanoscale carbides (∼80 nm) pinned at cellular boundaries (100 nm to micrometer scale), contrasting with the equiaxed grains (∼10 μm) and coarse W-rich M6C carbides (∼5 μm) in forged samples. After isothermal oxidation at 1000 °C and 1100 °C for 200 h, SLM samples show significantly lower mass gains compared to forged samples (69 % and 75 % of forged values), attributed to enhanced oxide scale adhesion and stability. Cyclic oxidation at 1000 °C for 50 cycles reveals stable mass gains in SLM samples (37 % of forged value) with minimal cracking, while forged samples suffer severe spallation due to volatile WO3 formation from coarse carbides. This study demonstrates that SLM's refined microstructure suppresses deleterious carbide decomposition, offering a novel strategy to enhance the oxidation resistance of Co-based superalloys for aerospace and high-temperature applications. © 2025 The Authors.

AB - The high-temperature oxidation behavior of GH5188 cobalt-based superalloy, fabricated via selective laser melting (SLM) and forging, is investigated to elucidate the impact of additive manufacturing on oxidation resistance. SLM-processed samples exhibit a hierarchical microstructure with nanoscale carbides (∼80 nm) pinned at cellular boundaries (100 nm to micrometer scale), contrasting with the equiaxed grains (∼10 μm) and coarse W-rich M6C carbides (∼5 μm) in forged samples. After isothermal oxidation at 1000 °C and 1100 °C for 200 h, SLM samples show significantly lower mass gains compared to forged samples (69 % and 75 % of forged values), attributed to enhanced oxide scale adhesion and stability. Cyclic oxidation at 1000 °C for 50 cycles reveals stable mass gains in SLM samples (37 % of forged value) with minimal cracking, while forged samples suffer severe spallation due to volatile WO3 formation from coarse carbides. This study demonstrates that SLM's refined microstructure suppresses deleterious carbide decomposition, offering a novel strategy to enhance the oxidation resistance of Co-based superalloys for aerospace and high-temperature applications. © 2025 The Authors.

KW - Co-based superalloy

KW - High-temperature oxidation

KW - Microstructure refinement

KW - Oxidation resistance

KW - Selective laser melting

UR - https://www.scopus.com/pages/publications/105015364697

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105015364697&origin=recordpage

U2 - 10.1016/j.smmf.2025.100093

DO - 10.1016/j.smmf.2025.100093

M3 - RGC 21 - Publication in refereed journal

SN - 2772-8102

VL - 3

JO - Smart Materials in Manufacturing

JF - Smart Materials in Manufacturing

M1 - 100093

ER -

High-temperature oxidation behavior of SLM-processed and forged GH5188 Co-based superalloy

Abstract

Funding

UN SDGs

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

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High-temperature oxidation behavior of SLM-processed and forged GH5188 Co-based superalloy

Abstract

Funding

UN SDGs

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

Cite this