In-situ observation of hydrogen induced crack initiation in a nickel-based superalloy

Zhenbo Zhang; Gideon Obasi; Roberto Morana; Michael Preuss

doi:10.1016/j.scriptamat.2017.07.006

In-situ observation of hydrogen induced crack initiation in a nickel-based superalloy

Zhenbo Zhang, Gideon Obasi, Roberto Morana, Michael Preuss

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

74 Citations (Scopus)

Abstract

Hydrogen induced crack initiation in a nickel-based superalloy was studied via in-situ Scanning Electron Microscopy observation under slow strain rate loading. Direct evidence has been obtained of crack initiation and propagation along dislocation slip bands leading to sample fracture. Post-mortem microstructural analysis showed that hydrogen induced cracking and separation along dislocation slip bands, which are along {111}γ crystallographic planes with the highest Schmid factor, leads to the formation of the typical slip-trace-like features on the quasi-cleavage surface.

Original language	English
Pages (from-to)	40-44
Number of pages	5
Journal	Scripta Materialia
Volume	140
DOIs	https://doi.org/10.1016/j.scriptamat.2017.07.006
Publication status	Published - Nov 2017
Externally published	Yes

Keywords

Crack initiation
Dislocation slip band
Hydrogen embrittlement
In-situ loading
Nickel-based superalloy

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10.1016/j.scriptamat.2017.07.006

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title = "In-situ observation of hydrogen induced crack initiation in a nickel-based superalloy",

abstract = "Hydrogen induced crack initiation in a nickel-based superalloy was studied via in-situ Scanning Electron Microscopy observation under slow strain rate loading. Direct evidence has been obtained of crack initiation and propagation along dislocation slip bands leading to sample fracture. Post-mortem microstructural analysis showed that hydrogen induced cracking and separation along dislocation slip bands, which are along \{111\}γ crystallographic planes with the highest Schmid factor, leads to the formation of the typical slip-trace-like features on the quasi-cleavage surface.",

keywords = "Crack initiation, Dislocation slip band, Hydrogen embrittlement, In-situ loading, Nickel-based superalloy",

author = "Zhenbo Zhang and Gideon Obasi and Roberto Morana and Michael Preuss",

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T1 - In-situ observation of hydrogen induced crack initiation in a nickel-based superalloy

AU - Zhang, Zhenbo

AU - Obasi, Gideon

AU - Morana, Roberto

AU - Preuss, Michael

PY - 2017/11

Y1 - 2017/11

N2 - Hydrogen induced crack initiation in a nickel-based superalloy was studied via in-situ Scanning Electron Microscopy observation under slow strain rate loading. Direct evidence has been obtained of crack initiation and propagation along dislocation slip bands leading to sample fracture. Post-mortem microstructural analysis showed that hydrogen induced cracking and separation along dislocation slip bands, which are along {111}γ crystallographic planes with the highest Schmid factor, leads to the formation of the typical slip-trace-like features on the quasi-cleavage surface.

AB - Hydrogen induced crack initiation in a nickel-based superalloy was studied via in-situ Scanning Electron Microscopy observation under slow strain rate loading. Direct evidence has been obtained of crack initiation and propagation along dislocation slip bands leading to sample fracture. Post-mortem microstructural analysis showed that hydrogen induced cracking and separation along dislocation slip bands, which are along {111}γ crystallographic planes with the highest Schmid factor, leads to the formation of the typical slip-trace-like features on the quasi-cleavage surface.

KW - Crack initiation

KW - Dislocation slip band

KW - Hydrogen embrittlement

KW - In-situ loading

KW - Nickel-based superalloy

UR - https://www.scopus.com/pages/publications/85023638933

U2 - 10.1016/j.scriptamat.2017.07.006

DO - 10.1016/j.scriptamat.2017.07.006

M3 - Article

AN - SCOPUS:85023638933

SN - 1359-6462

VL - 140

SP - 40

EP - 44

JO - Scripta Materialia

JF - Scripta Materialia

ER -

In-situ observation of hydrogen induced crack initiation in a nickel-based superalloy

Abstract

Keywords

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