A STUDY ON THE FATIGUE FRACTURE OF NODULAR CAST IRON CRANKSHAFTS OF MEDIUM-SPEED MARINE DIESEL ENGINE

Nodular cast iron is often used for medium-speed diesel engine crankshafts because it is easier to obtain a reasonable crankshaft blank structure with this material than with forged steel. It is therefore important to study the effect of material and technology on fatigue fracture in order to improve crankshaft reliability and meet the requirements of heavily loaded engines. This paper discusses fatigue strength tests that were performed on nodular cast iron crankshafts; the extent to which fatigue strength was shown to be affected by graphite nodules, cementite, impurities and shrink holes; the results of fracture toughness tests on crankshaft materials subjected to different heat treatments; and the corresponding conclusions reached.

• Supplemental Notes:
  • Conference paper
• Authors:
  • Yang, H
  • Liu, Z C
  • Niu, Q
• Conference:
  • Water Transport '87
  • Location: Beijing, China
  • Date: 1987-5-28 to 1987-5-30
• Publication Date: 0

Media Info

• Features: References;
• Pagination: 9p.

Subject/Index Terms

• TRT Terms: Cast iron; Cracking; Crankshafts; Fatigue strength; Fatigue tests; Fracture mechanics
• Uncontrolled Terms: Fracture
• Old TRIS Terms: Medium speed diesels; Nodular iron
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00658413
• Record Type: Publication
• Source Agency: Maritime Technical Information Facility
• Files: TRIS
• Created Date: Jul 21 1994 12:00AM