Accession Number : AD0693854

Title :   ABOUT CERTAIN BEHAVIORIAL PATTERNS OF THERMAL FATIGUE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Egorov,V. I.

Report Date : 20 MAY 1969

Pagination or Media Count : 15

Abstract : The startup, shutdown and load-adjustment of various types of power generating equipment often involve thermal stresses and deformations induced by the attendant restriction of temperature-induced expansion. The repeated action of thermal stresses causes cracking and fracture of the material of an equipment element. This type of fatigue fracture is termed thermal fatigue. Of major interest is a comparison of the behavior of materials according to the results of their tests by various methods on taking into account various approaches to estimating resistance to thermal fatigue. Hence the steels EI-852, EI-853, EI-888 and EP-38 were experimentally tested by comparing the number of cycles to fracture under the same thermal conditions (within the same temperature range) in the presence of different mechanical conditions (by linking to the system elements of varying rigidity). (Author)

Descriptors :   (*STEEL, *THERMAL STRESSES), (*POWER EQUIPMENT, THERMAL STRESSES), DEFORMATION, FATIGUE(MECHANICS), PLASTIC PROPERTIES, CRACKS, STATISTICAL ANALYSIS, USSR

Subject Categories : Metallurgy and Metallography
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE