EFFECT OF PRE-AND POST-HEATING ON WELD CRACKING OF LOW ALLOY STEELS

The results indicate that cold cracking cannot occur at the temperature above the critical point, which is 80deg C in the case of HT80 steel joint; the delayed cracking may occur at low temperatures; the activation energy determined by incubation time of delayed cracking is 11,000 cal/mol at the temperatures over-30deg C and 2300 cal/mol below -30deg C, the activation energy determined by the effect of postheating on the cracking is 13,000 cal/mol independently of steel grade, and the preheat temperature may be reduced by using postheating, but thermal stress cracking may occur under certain conditions under which blue brittleness or precipitation brittleness takes place.

• Corporate Authors:

  Japan Welding Society

  1-11, Sakuma-cho, Kanda, Chiyoda-ku
  Tokyo,   Japan 
• Authors:
  • Kume, R
  • Okabayashi, H
  • Naiki, T
• Publication Date: 1974-9

Media Info

• Features: References;
• Pagination: p. 62-71
• Serial:
  • Japan Welding Society Transactions
  • Volume: 5
  • Issue Number: 2

Subject/Index Terms

• TRT Terms: Alloy steel; Cold weather; Cold weather construction; Fracture mechanics; Low temperature; Stresses; Welding
• Old TRIS Terms: Welding stresses
• Subject Areas: Construction; Railroads;

Filing Info

• Accession Number: 00095640
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jul 24 1975 12:00AM