In-situ microscale examination of hydrogen effect on fracture toughness: A case study on B2 and D03 ordered iron aluminides intermetallic alloys

Yun Deng; Bjørn Rune Sørås Rogne; Afrooz Barnoush

doi:10.1016/j.engfracmech.2019.106551

In-situ microscale examination of hydrogen effect on fracture toughness: A case study on B2 and D03 ordered iron aluminides intermetallic alloys

Yun Deng, Bjørn Rune Sørås Rogne, Afrooz Barnoush^*

^*Corresponding author for this work

Norwegian University of Science and Technology

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

14 Citations (Scopus)

Abstract

The hydrogen embrittlement phenomenon of iron aluminides (Fe3Al and FeAl) at microscale was investigated by microcantilevers bending tests with a (1 0 0)[0 0 1] crack system. The cantilevers were loaded in-situ in an environmental scanning electron microscope under two conditions: one with water vapor to promote hydrogen uptake and the other one with high vacuum as a reference state. Fe3Al shows a distinguished cleavage fracture behavior when tested under both conditions. The microscale fracture toughness of Fe3Al was evaluated by linear elastic fracture mechanics and the basic J-integral method. FeAl, however, exhibited a stable cracking behavior and thus the fracture toughness was characterized using iterative J-integral method. For both materials, the hydrogen is found to reduce the maximum bearing load and enhance the cracking process.

Original language	English
Article number	106551
Journal	Engineering Fracture Mechanics
Volume	217
DOIs	https://doi.org/10.1016/j.engfracmech.2019.106551
Publication status	Published - Aug 2019
Externally published	Yes

Access to Document

10.1016/j.engfracmech.2019.106551

Cite this

@article{c0635cd75319490897670363ad2a0650,

title = "In-situ microscale examination of hydrogen effect on fracture toughness: A case study on B2 and D03 ordered iron aluminides intermetallic alloys",

abstract = "The hydrogen embrittlement phenomenon of iron aluminides (Fe3Al and FeAl) at microscale was investigated by microcantilevers bending tests with a (1 0 0)[0 0 1] crack system. The cantilevers were loaded in-situ in an environmental scanning electron microscope under two conditions: one with water vapor to promote hydrogen uptake and the other one with high vacuum as a reference state. Fe3Al shows a distinguished cleavage fracture behavior when tested under both conditions. The microscale fracture toughness of Fe3Al was evaluated by linear elastic fracture mechanics and the basic J-integral method. FeAl, however, exhibited a stable cracking behavior and thus the fracture toughness was characterized using iterative J-integral method. For both materials, the hydrogen is found to reduce the maximum bearing load and enhance the cracking process.",

author = "Yun Deng and Rogne, \{Bj{\o}rn Rune S{\o}r{\aa}s\} and Afrooz Barnoush",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = aug,

doi = "10.1016/j.engfracmech.2019.106551",

language = "English",

volume = "217",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - In-situ microscale examination of hydrogen effect on fracture toughness

T2 - A case study on B2 and D03 ordered iron aluminides intermetallic alloys

AU - Deng, Yun

AU - Rogne, Bjørn Rune Sørås

AU - Barnoush, Afrooz

PY - 2019/8

Y1 - 2019/8

N2 - The hydrogen embrittlement phenomenon of iron aluminides (Fe3Al and FeAl) at microscale was investigated by microcantilevers bending tests with a (1 0 0)[0 0 1] crack system. The cantilevers were loaded in-situ in an environmental scanning electron microscope under two conditions: one with water vapor to promote hydrogen uptake and the other one with high vacuum as a reference state. Fe3Al shows a distinguished cleavage fracture behavior when tested under both conditions. The microscale fracture toughness of Fe3Al was evaluated by linear elastic fracture mechanics and the basic J-integral method. FeAl, however, exhibited a stable cracking behavior and thus the fracture toughness was characterized using iterative J-integral method. For both materials, the hydrogen is found to reduce the maximum bearing load and enhance the cracking process.

AB - The hydrogen embrittlement phenomenon of iron aluminides (Fe3Al and FeAl) at microscale was investigated by microcantilevers bending tests with a (1 0 0)[0 0 1] crack system. The cantilevers were loaded in-situ in an environmental scanning electron microscope under two conditions: one with water vapor to promote hydrogen uptake and the other one with high vacuum as a reference state. Fe3Al shows a distinguished cleavage fracture behavior when tested under both conditions. The microscale fracture toughness of Fe3Al was evaluated by linear elastic fracture mechanics and the basic J-integral method. FeAl, however, exhibited a stable cracking behavior and thus the fracture toughness was characterized using iterative J-integral method. For both materials, the hydrogen is found to reduce the maximum bearing load and enhance the cracking process.

UR - https://www.scopus.com/pages/publications/85069669619

U2 - 10.1016/j.engfracmech.2019.106551

DO - 10.1016/j.engfracmech.2019.106551

M3 - Article

AN - SCOPUS:85069669619

SN - 0013-7944

VL - 217

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 106551

ER -

In-situ microscale examination of hydrogen effect on fracture toughness: A case study on B2 and D03 ordered iron aluminides intermetallic alloys

Abstract

Access to Document

Other files and links

Fingerprint

Cite this