Accession Number : AD0658879

Title :   THE EFFECT OF INTERMEDIATE CONDITIONING IN THE PROCESS OF STEEL FATIGUE ON STEEL DURABILITY,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Glikman,L. A. ; Tekht,V. P.

Report Date : 28 FEB 1967

Pagination or Media Count : 12

Abstract : Specimens of carbon steel 40 (0.37-0.45% carbon) and chromium stainless steel 2Kh13 (0.16-0.23% carbon, 12-14% chromium) were subjected to cyclic stresses 10-15% higher than their fatigue strength (29.5-30.6 and 33.7 kg/mm2, respectively) for a number of cycles equal to 75 to 95% of the number of cycles at failure. After that, the stress was lowered to 75-90% of the fatigue strength for 5,000,000 cycles (training period) and then returned to the initial magnitude, which was maintained up to failure. The training significantly improved the fatigue 'life' of both steels. For instance, while untrained specimens of steel 40 under stresses 10 or 15% higher than fatigue strength failed after 192,650-353,500 or 230,650-239,950 cycles, respectively, the trained specimens failed after 254,200-750,600 or 259,400-352,200 cycles; 2Kh13 steel exhibited similar behavior. Post-training annealing of 2Kh13 steel at 650C for 2 hr in argon produced no additional beneficial effect. (Author)

Descriptors :   (*CARBON ALLOYS, *FATIGUE(MECHANICS)), (*STAINLESS STEEL, FATIGUE(MECHANICS)), STRESSES, ANNEALING, CRACKS, ARGON, HARDENING, USSR

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE