High cycle fatigue crack propagation resistance and fracture toughness in ship steels (Short Communication)

  • R.S. Tripathi Naval Dockyard, Visakhapatnam
  • R.V. Rama Rao Naval Dockyard, Visakhapatnam
  • S.P. Pattanaik Naval Dockyard, Visakhapatnam
Keywords: Low alloy steel, Fatigue, Crack, Fracture toughness, High cycle fatigue

Abstract

In this paper, two grades of steel, viz., plain carbon steel and low alloy steel used in naval ships have been selected for studies on high cycle fatigue, crack propagation, stress intensity and crack opening displacement (COD). Specimen for high cycle fatigue was prepared as per IS: 1608. High cycle fatigue was carried out up to 50,000 cycles at 1000 kgfto 2000 kgfloads. Up to 2000 kgfloads, both the materials were observed within elastic zones. A number of paran1eters, including stress, strain and strain range, which indicate elastic behaviour of steels, have been considered. Low alloy steel specimen was prepared as per ASTM standard: E-399 and subjected to 5,00,000 cycles. Crack propagation, COD, stress intensity, load-cycle variations, load-COD relation, and other related paran1eters have been studied using a modem universal testing machine with state-of-the-art technology
Published
2002-01-01
How to Cite
Tripathi, R., Rao, R., & Pattanaik, S. (2002). High cycle fatigue crack propagation resistance and fracture toughness in ship steels (Short Communication). Defence Science Journal, 51(2), 201-210. https://doi.org/10.14429/dsj.51.2231
Section
Materials Science & Metallurgy