Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys

Zhifu Yao; Longke Bao; Mujin Yang; Yuechao Chen; Minglin He; Jiang Yi; Xintong Yang; Tao Yang; Yilu Zhao; Cuiping Wang; Zheng Zhong; Shuai Wang; Xingjun Liu

doi:10.1016/j.scriptamat.2023.115942

Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys

Zhifu Yao, Longke Bao, Mujin Yang, Yuechao Chen, Minglin He, Jiang Yi, Xintong Yang, Tao Yang, Yilu Zhao, Cuiping Wang, Zheng Zhong^*, Shuai Wang, Xingjun Liu

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

Cobalt-based γ'-strengthened superalloy exhibits tremendous potential in numerous fields, such as power generation equipment and the aerospace industry. The characteristics of laser powder bed fusion technology have aligned well with the demands for superalloy's strong texture or single crystal microstructure. However, the post-heat treatment processes often disrupt the initial microstructure of the as-printed parts due to unavoidable recrystallization. In this study, we obtained a strong <101> texture in an as-printed Co-5Al-14V (at.%) ternary cobalt-based superalloy, which is difficult to achieve in nickel-based superalloys. Intriguingly, this <101> texture remains thermally stable even after aging treatment at a near γ' solvus temperature. Hence, a <101> textured microstructure with an evenly distributed γ'(L12) precipitates was attained, which benefits the improvement of high-temperature creep resistance. The unique microstructure characteristics revealed in this work can be beneficial for the development of cobalt-based superalloys and shed light on the microstructural engineering of other LPBF-manufactured superalloys. © 2023 Acta Materialia Inc.

Original language	English
Article number	115942
Number of pages	7
Journal	Scripta Materialia
Volume	242
Online published	16 Dec 2023
DOIs	https://doi.org/10.1016/j.scriptamat.2023.115942
Publication status	Published - 15 Mar 2024

Research Keywords

Additive manufacturing
Cobalt-based superalloy
Laser-powder bed fusion
Recrystallization
Texture

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title = "Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys",

abstract = "Cobalt-based γ'-strengthened superalloy exhibits tremendous potential in numerous fields, such as power generation equipment and the aerospace industry. The characteristics of laser powder bed fusion technology have aligned well with the demands for superalloy's strong texture or single crystal microstructure. However, the post-heat treatment processes often disrupt the initial microstructure of the as-printed parts due to unavoidable recrystallization. In this study, we obtained a strong <101> texture in an as-printed Co-5Al-14V (at.%) ternary cobalt-based superalloy, which is difficult to achieve in nickel-based superalloys. Intriguingly, this <101> texture remains thermally stable even after aging treatment at a near γ' solvus temperature. Hence, a <101> textured microstructure with an evenly distributed γ'(L12) precipitates was attained, which benefits the improvement of high-temperature creep resistance. The unique microstructure characteristics revealed in this work can be beneficial for the development of cobalt-based superalloys and shed light on the microstructural engineering of other LPBF-manufactured superalloys. {\textcopyright} 2023 Acta Materialia Inc.",

keywords = "Additive manufacturing, Cobalt-based superalloy, Laser-powder bed fusion, Recrystallization, Texture",

author = "Zhifu Yao and Longke Bao and Mujin Yang and Yuechao Chen and Minglin He and Jiang Yi and Xintong Yang and Tao Yang and Yilu Zhao and Cuiping Wang and Zheng Zhong and Shuai Wang and Xingjun Liu",

year = "2024",

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doi = "10.1016/j.scriptamat.2023.115942",

language = "English",

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journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

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TY - JOUR

T1 - Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys

AU - Yao, Zhifu

AU - Bao, Longke

AU - Yang, Mujin

AU - Chen, Yuechao

AU - He, Minglin

AU - Yi, Jiang

AU - Yang, Xintong

AU - Yang, Tao

AU - Zhao, Yilu

AU - Wang, Cuiping

AU - Zhong, Zheng

AU - Wang, Shuai

AU - Liu, Xingjun

PY - 2024/3/15

Y1 - 2024/3/15

N2 - Cobalt-based γ'-strengthened superalloy exhibits tremendous potential in numerous fields, such as power generation equipment and the aerospace industry. The characteristics of laser powder bed fusion technology have aligned well with the demands for superalloy's strong texture or single crystal microstructure. However, the post-heat treatment processes often disrupt the initial microstructure of the as-printed parts due to unavoidable recrystallization. In this study, we obtained a strong <101> texture in an as-printed Co-5Al-14V (at.%) ternary cobalt-based superalloy, which is difficult to achieve in nickel-based superalloys. Intriguingly, this <101> texture remains thermally stable even after aging treatment at a near γ' solvus temperature. Hence, a <101> textured microstructure with an evenly distributed γ'(L12) precipitates was attained, which benefits the improvement of high-temperature creep resistance. The unique microstructure characteristics revealed in this work can be beneficial for the development of cobalt-based superalloys and shed light on the microstructural engineering of other LPBF-manufactured superalloys. © 2023 Acta Materialia Inc.

AB - Cobalt-based γ'-strengthened superalloy exhibits tremendous potential in numerous fields, such as power generation equipment and the aerospace industry. The characteristics of laser powder bed fusion technology have aligned well with the demands for superalloy's strong texture or single crystal microstructure. However, the post-heat treatment processes often disrupt the initial microstructure of the as-printed parts due to unavoidable recrystallization. In this study, we obtained a strong <101> texture in an as-printed Co-5Al-14V (at.%) ternary cobalt-based superalloy, which is difficult to achieve in nickel-based superalloys. Intriguingly, this <101> texture remains thermally stable even after aging treatment at a near γ' solvus temperature. Hence, a <101> textured microstructure with an evenly distributed γ'(L12) precipitates was attained, which benefits the improvement of high-temperature creep resistance. The unique microstructure characteristics revealed in this work can be beneficial for the development of cobalt-based superalloys and shed light on the microstructural engineering of other LPBF-manufactured superalloys. © 2023 Acta Materialia Inc.

KW - Additive manufacturing

KW - Cobalt-based superalloy

KW - Laser-powder bed fusion

KW - Recrystallization

KW - Texture

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U2 - 10.1016/j.scriptamat.2023.115942

DO - 10.1016/j.scriptamat.2023.115942

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 242

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 115942

ER -

Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys

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Research Keywords

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