Development of a micro-beam method to investigate the fatigue crack growth mechanisms of submicron-scale cracks

Y. Yang; Haihui Ruan; J. Lu; N. Yao; W. L. Shan; W. O. Soboyejo

doi:10.1007/s11340-008-9180-y

Development of a micro-beam method to investigate the fatigue crack growth mechanisms of submicron-scale cracks

Y. Yang, Haihui Ruan, J. Lu, N. Yao, W. L. Shan, W. O. Soboyejo

Research output: Journal article publication › Journal article › Academic research › peer-review

6 Citations (Scopus)

Abstract

In this paper, we propose a new experimental method to investigate the fatigue crack growth mechanisms of submicron-scale cracks by using freestanding single edge notched micro-beams that are fabricated on the surfaces of conventional bending specimens with the focused ion beam technique. Three dimensional FEM simulations in conjugate with LEFM fracture analysis were carried out to correlate the applied far field stresses with the local crack-tip driving force. For the validation of the new method, micro-beam experiments were conducted on 4340 low alloy steels and the results showed the similar findings compared to those in the literature while revealed undiscovered fatigue damage mechanisms that took place at the submicron and nanometer scales.

Original language	English
Pages (from-to)	731-742
Number of pages	12
Journal	Experimental Mechanics
Volume	49
Issue number	5
DOIs	https://doi.org/10.1007/s11340-008-9180-y
Publication status	Published - 1 Jan 2009

Keywords

Fatigue
Fatigue tests
Focused ion beam (FIB)
Steels

ASJC Scopus subject areas

Aerospace Engineering
Mechanics of Materials
Mechanical Engineering

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10.1007/s11340-008-9180-y

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abstract = "In this paper, we propose a new experimental method to investigate the fatigue crack growth mechanisms of submicron-scale cracks by using freestanding single edge notched micro-beams that are fabricated on the surfaces of conventional bending specimens with the focused ion beam technique. Three dimensional FEM simulations in conjugate with LEFM fracture analysis were carried out to correlate the applied far field stresses with the local crack-tip driving force. For the validation of the new method, micro-beam experiments were conducted on 4340 low alloy steels and the results showed the similar findings compared to those in the literature while revealed undiscovered fatigue damage mechanisms that took place at the submicron and nanometer scales.",

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AU - Ruan, Haihui

AU - Lu, J.

AU - Yao, N.

AU - Shan, W. L.

AU - Soboyejo, W. O.

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AB - In this paper, we propose a new experimental method to investigate the fatigue crack growth mechanisms of submicron-scale cracks by using freestanding single edge notched micro-beams that are fabricated on the surfaces of conventional bending specimens with the focused ion beam technique. Three dimensional FEM simulations in conjugate with LEFM fracture analysis were carried out to correlate the applied far field stresses with the local crack-tip driving force. For the validation of the new method, micro-beam experiments were conducted on 4340 low alloy steels and the results showed the similar findings compared to those in the literature while revealed undiscovered fatigue damage mechanisms that took place at the submicron and nanometer scales.

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Development of a micro-beam method to investigate the fatigue crack growth mechanisms of submicron-scale cracks

Abstract

Keywords

ASJC Scopus subject areas

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