Crack closure behavior under high-load ratio for AISI 4340 steel

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

Abstract

In this paper, fatigue crack growth rate (FCGR) analyses were conducted on compact specimens of an AISI 4340 alloy to study the behavior over a range in load ratios (0.1 ≤ R ≤ 0.95) and constant maximum stress intensity factor (Kmax) condition. Previous study had indicated that high R > 0.7 and constant Kmax test conditions near threshold conditions were suspected to be free of crack-closure and that any differences were caused by Kmax effects, from threshold to near fracture conditions. Cracks in high-cycle fatigue (HCF) components spend a large portion of their fatigue life near threshold conditions. In order to characterize the evolution of damage and crack propagation during these conditions, fatigue crack growth rate (FCGR) data at threshold and near-threshold conditions are essential in predicting service life and in determining the proper inspection intervals. Fatigue crack growth model, namely the Forman model were examined, this model implicit the effect of R ratio and ease of curve fitting to measured data. The Forman model may be suggested for use in critical applications in studying fatigue crack growth for different load ratios.

Original languageEnglish
Title of host publicationKey Engineering Materials
Pages54-58
Number of pages5
Volume462-463
DOIs
Publication statusPublished - 2011
Event8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010 - Kuala Lumpur
Duration: 7 Jun 20109 Jun 2010

Publication series

NameKey Engineering Materials
Volume462-463
ISSN (Print)10139826

Other

Other8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010
CityKuala Lumpur
Period7/6/109/6/10

Fingerprint

Crack closure
Steel
Fatigue crack propagation
Fatigue of materials
Curve fitting
Stress intensity factors
Service life
Crack propagation
Inspection
Cracks

Keywords

  • Crack closure
  • Fatigue-crack growth
  • K effect
  • Load ratio

ASJC Scopus subject areas

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

Cite this

AbdulRazzaq, M., Mohd Ihsan, A. K. A., Abdullah, S., & Sajuri, Z. (2011). Crack closure behavior under high-load ratio for AISI 4340 steel. In Key Engineering Materials (Vol. 462-463, pp. 54-58). (Key Engineering Materials; Vol. 462-463). https://doi.org/10.4028/www.scientific.net/KEM.462-463.54

Crack closure behavior under high-load ratio for AISI 4340 steel. / AbdulRazzaq, M.; Mohd Ihsan, Ahmad Kamal Ariffin; Abdullah, Shahrum; Sajuri, Zainuddin.

Key Engineering Materials. Vol. 462-463 2011. p. 54-58 (Key Engineering Materials; Vol. 462-463).

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

AbdulRazzaq, M, Mohd Ihsan, AKA, Abdullah, S & Sajuri, Z 2011, Crack closure behavior under high-load ratio for AISI 4340 steel. in Key Engineering Materials. vol. 462-463, Key Engineering Materials, vol. 462-463, pp. 54-58, 8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010, Kuala Lumpur, 7/6/10. https://doi.org/10.4028/www.scientific.net/KEM.462-463.54
AbdulRazzaq M, Mohd Ihsan AKA, Abdullah S, Sajuri Z. Crack closure behavior under high-load ratio for AISI 4340 steel. In Key Engineering Materials. Vol. 462-463. 2011. p. 54-58. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.462-463.54
AbdulRazzaq, M. ; Mohd Ihsan, Ahmad Kamal Ariffin ; Abdullah, Shahrum ; Sajuri, Zainuddin. / Crack closure behavior under high-load ratio for AISI 4340 steel. Key Engineering Materials. Vol. 462-463 2011. pp. 54-58 (Key Engineering Materials).
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