Fatigue fracture mechanism of extruded Al alloy 7075-T6 in high humidity

K. Kariya, N. Kawagoishi, H. Maeda, Qiang Chen, M. Goto, Y. Nu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Effect of high humidity on growth mechanism of a fatigue crack was investigated for an extruded bar of an age-hardened Al alloy 7075-T6 which had the marked texture of plane (111). Fracture in high humidity occurred by the growth of a shear mode crack under high stress levels, though a crack propagated in a tensile mode under low stress ones, macroscopically. Many voids and slip planes were observed on the fracture surface yielded by the shear mode crack. Especially most of the fracture surface was occupied by voids where the crack was small. The void percentage decreased with increasing in the crack depth. Fracture surface yielded by the shear mode crack was a plane (100). The growth direction of the shear mode crack to the cross section of specimen was about 55° corresponding to the angle composed by this plane and the texture of plane (111). These results suggest that the shear mode crack was related to microstructure, stress and environment. The growth mechanism of the shear mode crack assisted by hydrogen was proposed based on the results of the acceleration of crack growth and the formation of voids in high humidity.

Original languageEnglish
Title of host publicationAdvances in Fracture and Damage Mechanics X
Pages45-48
Number of pages4
DOIs
Publication statusPublished - Jan 1 2012
Externally publishedYes
Event10th International Conference on Fracture and Damage Mechanics, FDM2011 - Dubrovnik, Croatia
Duration: Sep 19 2011Sep 21 2011

Publication series

NameKey Engineering Materials
Volume488-489
ISSN (Print)1013-9826

Other

Other10th International Conference on Fracture and Damage Mechanics, FDM2011
CountryCroatia
CityDubrovnik
Period9/19/119/21/11

Fingerprint

Atmospheric humidity
Fatigue of materials
Cracks
Textures
Hydrogen
Crack propagation
Microstructure

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kariya, K., Kawagoishi, N., Maeda, H., Chen, Q., Goto, M., & Nu, Y. (2012). Fatigue fracture mechanism of extruded Al alloy 7075-T6 in high humidity. In Advances in Fracture and Damage Mechanics X (pp. 45-48). (Key Engineering Materials; Vol. 488-489). https://doi.org/10.4028/www.scientific.net/KEM.488-489.45

Fatigue fracture mechanism of extruded Al alloy 7075-T6 in high humidity. / Kariya, K.; Kawagoishi, N.; Maeda, H.; Chen, Qiang; Goto, M.; Nu, Y.

Advances in Fracture and Damage Mechanics X. 2012. p. 45-48 (Key Engineering Materials; Vol. 488-489).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kariya, K, Kawagoishi, N, Maeda, H, Chen, Q, Goto, M & Nu, Y 2012, Fatigue fracture mechanism of extruded Al alloy 7075-T6 in high humidity. in Advances in Fracture and Damage Mechanics X. Key Engineering Materials, vol. 488-489, pp. 45-48, 10th International Conference on Fracture and Damage Mechanics, FDM2011, Dubrovnik, Croatia, 9/19/11. https://doi.org/10.4028/www.scientific.net/KEM.488-489.45
Kariya K, Kawagoishi N, Maeda H, Chen Q, Goto M, Nu Y. Fatigue fracture mechanism of extruded Al alloy 7075-T6 in high humidity. In Advances in Fracture and Damage Mechanics X. 2012. p. 45-48. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.488-489.45
Kariya, K. ; Kawagoishi, N. ; Maeda, H. ; Chen, Qiang ; Goto, M. ; Nu, Y. / Fatigue fracture mechanism of extruded Al alloy 7075-T6 in high humidity. Advances in Fracture and Damage Mechanics X. 2012. pp. 45-48 (Key Engineering Materials).
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