EFFECTS OF STRESS-RELIEVING HEAT TREATMENT ON THE BRITTLE FRACTURE INITIATION IN WELDED STRUCTURES

Effects of stress-relieving heat treatment on brittle fracture initiation in welded structures are quantitatively discussed in terms of fracture mechanics. The basic concept employed for discussion is that brittle fracture should initiate when tensile yield zone formed ahead of a pre-existing crack attains a critical size depending on the material. The critical zone size as a function of temperature is predictable from Charpy-V transition temperature. Metallurgical information on welding residual stress and Charpy-V data for various conditions of heat treatment is compiled and put into the proposed logical framing of fracture mechanics. There is a divergence of conclusion for every type of steel. Cases studied are those of an ordinary mild steel, two kinds of quenched-and-tempered high strength steels and a Mn-Mo steel for nuclear pressure vessels.

• Corporate Authors:

  Society of Naval Architects of Japan

  23 Shiba-kotohiracho, Minato-ku
  Tokyo 135,   Japan 
• Authors:
  • Koshiga, F
  • TANAKA, J
  • Kurita, Y
• Publication Date: 1973-11

Media Info

• Features: References;
• Pagination: p. 148-160
• Serial:
  • Selected Papers, J of Soc of Naval Arch of Japan
  • Volume: 11
  • Publisher: Society of Naval Architects of Japan

Subject/Index Terms

• TRT Terms: Cracking; Fracture mechanics; Joints (Engineering); Metal heating; Welds
• Uncontrolled Terms: Crack propagation; Heat treatment; Welded joints
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00057588
• Record Type: Publication
• Source Agency: Society of Naval Architects of Japan
• Files: TRIS
• Created Date: Sep 19 1974 12:00AM