Additive manufacturing of Ni-based superalloys: The outstanding issues

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Additive manufacturing of Ni-based superalloys : The outstanding issues. / Attallah, Moataz M.; Jennings, Rachel; Wang, Xiqian; Carter, Luke N.

In: MRS bulletin, Vol. 41, No. 10, 10.10.2016, p. 758-764.

Research output: Contribution to journalReview articlepeer-review

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Attallah, Moataz M. ; Jennings, Rachel ; Wang, Xiqian ; Carter, Luke N. / Additive manufacturing of Ni-based superalloys : The outstanding issues. In: MRS bulletin. 2016 ; Vol. 41, No. 10. pp. 758-764.

Bibtex

@article{8a1defac7da2455581b65226fe456163,
title = "Additive manufacturing of Ni-based superalloys: The outstanding issues",
abstract = "There is increasing interest in the use of additive manufacturing (AM) for Ni-based superalloys due to their various applications in the aerospace and power-generation sectors. Ni-based superalloys are known to have a complex chemistry, with over a dozen alloying elements in most alloys, enabling them to achieve outstanding high-temperature mechanical performance as well as oxidation resistance when processed using conventional routes (e.g., casting and forging). Nonetheless, this complex chemistry results in the formation of various phases that could affect their processability using AM, resulting in cracking. Furthermore, due to the directional solidification and rapid cooling associated with AM processes, the alloys experience significant anisotropy due to the epitaxially grown microstructure, as well as the residual stresses that can sometimes be difficult to mitigate using thermal postprocessing techniques. This article highlights the outstanding issues in Ni-based superalloys AM processing, with special emphasis on defect formation mechanisms, process optimization, and residual stress development.",
keywords = "metal, microstructure, Ni, texture",
author = "Attallah, {Moataz M.} and Rachel Jennings and Xiqian Wang and Carter, {Luke N.}",
year = "2016",
month = oct,
day = "10",
doi = "10.1557/mrs.2016.211",
language = "English",
volume = "41",
pages = "758--764",
journal = "MRS bulletin",
issn = "0883-7694",
publisher = "Cambridge University Press",
number = "10",

}

RIS

TY - JOUR

T1 - Additive manufacturing of Ni-based superalloys

T2 - The outstanding issues

AU - Attallah, Moataz M.

AU - Jennings, Rachel

AU - Wang, Xiqian

AU - Carter, Luke N.

PY - 2016/10/10

Y1 - 2016/10/10

N2 - There is increasing interest in the use of additive manufacturing (AM) for Ni-based superalloys due to their various applications in the aerospace and power-generation sectors. Ni-based superalloys are known to have a complex chemistry, with over a dozen alloying elements in most alloys, enabling them to achieve outstanding high-temperature mechanical performance as well as oxidation resistance when processed using conventional routes (e.g., casting and forging). Nonetheless, this complex chemistry results in the formation of various phases that could affect their processability using AM, resulting in cracking. Furthermore, due to the directional solidification and rapid cooling associated with AM processes, the alloys experience significant anisotropy due to the epitaxially grown microstructure, as well as the residual stresses that can sometimes be difficult to mitigate using thermal postprocessing techniques. This article highlights the outstanding issues in Ni-based superalloys AM processing, with special emphasis on defect formation mechanisms, process optimization, and residual stress development.

AB - There is increasing interest in the use of additive manufacturing (AM) for Ni-based superalloys due to their various applications in the aerospace and power-generation sectors. Ni-based superalloys are known to have a complex chemistry, with over a dozen alloying elements in most alloys, enabling them to achieve outstanding high-temperature mechanical performance as well as oxidation resistance when processed using conventional routes (e.g., casting and forging). Nonetheless, this complex chemistry results in the formation of various phases that could affect their processability using AM, resulting in cracking. Furthermore, due to the directional solidification and rapid cooling associated with AM processes, the alloys experience significant anisotropy due to the epitaxially grown microstructure, as well as the residual stresses that can sometimes be difficult to mitigate using thermal postprocessing techniques. This article highlights the outstanding issues in Ni-based superalloys AM processing, with special emphasis on defect formation mechanisms, process optimization, and residual stress development.

KW - metal

KW - microstructure

KW - Ni

KW - texture

UR - http://www.scopus.com/inward/record.url?scp=84990982267&partnerID=8YFLogxK

U2 - 10.1557/mrs.2016.211

DO - 10.1557/mrs.2016.211

M3 - Review article

AN - SCOPUS:84990982267

VL - 41

SP - 758

EP - 764

JO - MRS bulletin

JF - MRS bulletin

SN - 0883-7694

IS - 10

ER -