Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?

R. Jiang; D. Proprentner; M. Callisti; B. Shollock; X. T. Hu; Y. D. Song; P. A.S. Reed

doi:10.1016/j.corsci.2018.05.001

Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?

R. Jiang^*, D. Proprentner, M. Callisti, B. Shollock, X. T. Hu, Y. D. Song, P. A.S. Reed

^*Corresponding author for this work

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

59 Citations (Scopus)

215 Downloads (Pure)

Abstract

The role of oxygen in enhanced fatigue cracking in an advanced Ni-based superalloy for turbine disc application has been evaluated in fatigue crack initiation and propagation stages along with static oxidation tests. It is found that the grain boundary oxide intrusion has a layered structure. The microstructure- and deformation-dependent grain boundary oxidation dominates the fatigue crack initiation and early propagation processes. As the crack propagates, this contribution arising from oxidation damage may gradually be overtaken by dynamic embrittlement processes until the mechanical damage outstrips the oxygen-related damage, resulting in a transition from intergranular to transgranular crack propagation.

Original language	English
Pages (from-to)	141-154
Number of pages	14
Journal	CORROSION SCIENCE
Volume	139
Early online date	4 May 2018
DOIs	https://doi.org/10.1016/j.corsci.2018.05.001
Publication status	Published - 15 Jul 2018

Keywords

Dynamic embrittlement
Fatigue crack initiation
Fatigue crack propagation
Ni-based superalloys
Stress assisted grain boundary oxidation

Access to Document

10.1016/j.corsci.2018.05.001

Role of oxygen in_JIANG_Accepted2May2018Publishedonline15July2018_GREEN AAMAccepted author manuscript, 6.7 MBLicence: CC BY-NC-ND

http://wrap.warwick.ac.uk/103252/

Cite this

@article{4018e6d9b4c44a87be33c8f414a1b785,

title = "Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?",

abstract = "The role of oxygen in enhanced fatigue cracking in an advanced Ni-based superalloy for turbine disc application has been evaluated in fatigue crack initiation and propagation stages along with static oxidation tests. It is found that the grain boundary oxide intrusion has a layered structure. The microstructure- and deformation-dependent grain boundary oxidation dominates the fatigue crack initiation and early propagation processes. As the crack propagates, this contribution arising from oxidation damage may gradually be overtaken by dynamic embrittlement processes until the mechanical damage outstrips the oxygen-related damage, resulting in a transition from intergranular to transgranular crack propagation.",

keywords = "Dynamic embrittlement, Fatigue crack initiation, Fatigue crack propagation, Ni-based superalloys, Stress assisted grain boundary oxidation",

author = "R. Jiang and D. Proprentner and M. Callisti and B. Shollock and Hu, {X. T.} and Song, {Y. D.} and Reed, {P. A.S.}",

year = "2018",

month = jul,

day = "15",

doi = "10.1016/j.corsci.2018.05.001",

language = "English",

volume = "139",

pages = "141--154",

journal = "CORROSION SCIENCE",

issn = "0010-938X",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy

T2 - Stress assisted grain boundary oxidation or dynamic embrittlment?

AU - Jiang, R.

AU - Proprentner, D.

AU - Callisti, M.

AU - Shollock, B.

AU - Hu, X. T.

AU - Song, Y. D.

AU - Reed, P. A.S.

PY - 2018/7/15

Y1 - 2018/7/15

N2 - The role of oxygen in enhanced fatigue cracking in an advanced Ni-based superalloy for turbine disc application has been evaluated in fatigue crack initiation and propagation stages along with static oxidation tests. It is found that the grain boundary oxide intrusion has a layered structure. The microstructure- and deformation-dependent grain boundary oxidation dominates the fatigue crack initiation and early propagation processes. As the crack propagates, this contribution arising from oxidation damage may gradually be overtaken by dynamic embrittlement processes until the mechanical damage outstrips the oxygen-related damage, resulting in a transition from intergranular to transgranular crack propagation.

AB - The role of oxygen in enhanced fatigue cracking in an advanced Ni-based superalloy for turbine disc application has been evaluated in fatigue crack initiation and propagation stages along with static oxidation tests. It is found that the grain boundary oxide intrusion has a layered structure. The microstructure- and deformation-dependent grain boundary oxidation dominates the fatigue crack initiation and early propagation processes. As the crack propagates, this contribution arising from oxidation damage may gradually be overtaken by dynamic embrittlement processes until the mechanical damage outstrips the oxygen-related damage, resulting in a transition from intergranular to transgranular crack propagation.

KW - Dynamic embrittlement

KW - Fatigue crack initiation

KW - Fatigue crack propagation

KW - Ni-based superalloys

KW - Stress assisted grain boundary oxidation

UR - http://www.scopus.com/inward/record.url?scp=85046699630&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2018.05.001

DO - 10.1016/j.corsci.2018.05.001

M3 - Article

AN - SCOPUS:85046699630

SN - 0010-938X

VL - 139

SP - 141

EP - 154

JO - CORROSION SCIENCE

JF - CORROSION SCIENCE

ER -

Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this