Influence of defects on high-temperature oxidation performance of GH3536 superalloys fabricated by laser powder bed fusion

Shiling Min; Huawei Zhang; Hui Liu; Kai Zhang; Aijun Huang; Juan Hou

doi:10.1016/j.addlet.2022.100064

Influence of defects on high-temperature oxidation performance of GH3536 superalloys fabricated by laser powder bed fusion

Shiling Min, Huawei Zhang, Hui Liu, Kai Zhang, Aijun Huang, Juan Hou

Materials Science & Engineering

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

9 Citations (Scopus)

Abstract

This study investigates the formation of defects and their impact on oxidation behaviour of GH3536 superalloys fabricated by laser powder bed fusion (LPBF). Defects of six series of samples manufactured by different parameters is dominated by pores, micro-cracks, and lack of fusion, respectively. The superalloy is isothermally oxidised in 950 °C dry air for 500 h. The oxidation resistance of LPBF GH3536 depends on the types and quantity of processing defects, wherein the sample with micro-cracks as the main defect exhibit the worst oxidation resistance. Electron probe microanalysis of the superalloy revealed the impact of micro-cracks on diffusion process. Defects seriously deteriorate the oxidation resistance, especially micro-crack defects. Reducing manufacturing defects in the samples can improve the corrosion resistance.

Original language	English
Article number	100064
Number of pages	7
Journal	Additive Manufacturing Letters
Volume	3
DOIs	https://doi.org/10.1016/j.addlet.2022.100064
Publication status	Published - Dec 2022

Keywords

Defects
Electron probe microanalysis
High-temperature oxidation
Laser powder bed fusion
Microstructure
Superalloy

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10.1016/j.addlet.2022.100064

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title = "Influence of defects on high-temperature oxidation performance of GH3536 superalloys fabricated by laser powder bed fusion",

abstract = "This study investigates the formation of defects and their impact on oxidation behaviour of GH3536 superalloys fabricated by laser powder bed fusion (LPBF). Defects of six series of samples manufactured by different parameters is dominated by pores, micro-cracks, and lack of fusion, respectively. The superalloy is isothermally oxidised in 950 °C dry air for 500 h. The oxidation resistance of LPBF GH3536 depends on the types and quantity of processing defects, wherein the sample with micro-cracks as the main defect exhibit the worst oxidation resistance. Electron probe microanalysis of the superalloy revealed the impact of micro-cracks on diffusion process. Defects seriously deteriorate the oxidation resistance, especially micro-crack defects. Reducing manufacturing defects in the samples can improve the corrosion resistance.",

keywords = "Defects, Electron probe microanalysis, High-temperature oxidation, Laser powder bed fusion, Microstructure, Superalloy",

author = "Shiling Min and Huawei Zhang and Hui Liu and Kai Zhang and Aijun Huang and Juan Hou",

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doi = "10.1016/j.addlet.2022.100064",

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T1 - Influence of defects on high-temperature oxidation performance of GH3536 superalloys fabricated by laser powder bed fusion

AU - Min, Shiling

AU - Zhang, Huawei

AU - Liu, Hui

AU - Zhang, Kai

AU - Huang, Aijun

AU - Hou, Juan

PY - 2022/12

Y1 - 2022/12

N2 - This study investigates the formation of defects and their impact on oxidation behaviour of GH3536 superalloys fabricated by laser powder bed fusion (LPBF). Defects of six series of samples manufactured by different parameters is dominated by pores, micro-cracks, and lack of fusion, respectively. The superalloy is isothermally oxidised in 950 °C dry air for 500 h. The oxidation resistance of LPBF GH3536 depends on the types and quantity of processing defects, wherein the sample with micro-cracks as the main defect exhibit the worst oxidation resistance. Electron probe microanalysis of the superalloy revealed the impact of micro-cracks on diffusion process. Defects seriously deteriorate the oxidation resistance, especially micro-crack defects. Reducing manufacturing defects in the samples can improve the corrosion resistance.

AB - This study investigates the formation of defects and their impact on oxidation behaviour of GH3536 superalloys fabricated by laser powder bed fusion (LPBF). Defects of six series of samples manufactured by different parameters is dominated by pores, micro-cracks, and lack of fusion, respectively. The superalloy is isothermally oxidised in 950 °C dry air for 500 h. The oxidation resistance of LPBF GH3536 depends on the types and quantity of processing defects, wherein the sample with micro-cracks as the main defect exhibit the worst oxidation resistance. Electron probe microanalysis of the superalloy revealed the impact of micro-cracks on diffusion process. Defects seriously deteriorate the oxidation resistance, especially micro-crack defects. Reducing manufacturing defects in the samples can improve the corrosion resistance.

KW - Defects

KW - Electron probe microanalysis

KW - High-temperature oxidation

KW - Laser powder bed fusion

KW - Microstructure

KW - Superalloy

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DO - 10.1016/j.addlet.2022.100064

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SN - 2772-3690

VL - 3

JO - Additive Manufacturing Letters

JF - Additive Manufacturing Letters

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ER -

Influence of defects on high-temperature oxidation performance of GH3536 superalloys fabricated by laser powder bed fusion

Abstract

Keywords

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