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

[摘要] In this paper, two grades of steel, viz.,plain carbon steel and low alloy steel used in naval ships have beenselected for studies on high cycle fatigue, crack propagation, stressintensity and crack opening displacement (COD). Specimen for high cyclefatigue was prepared as per IS: 1608. High cycle fatigue was carried outup to 50,000 cycles at 1000 kgfto 2000 kgfloads. Up to 2000 kgfloads,both the materials were observed within elastic zones. A number ofparan1eters, including stress, strain and strain range, which indicateelastic behaviour of steels, have been considered. Low alloy steelspecimen was prepared as per ASTM standard: E-399 and subjected to5,00,000 cycles. Crack propagation, COD, stress intensity, load-cyclevariations, load-COD relation, and other related paran1eters have beenstudied using a modem universal testing machine with state-of-the-arttechnology

[学科分类] 社会科学、人文和艺术（综合）

[关键词] Low alloy steel;Fatigue;Crack;Fracture toughness;High cycle fatigue