Removal of Residual Stresses in Vessels by Internal Pressure,
Abstract
Residual stresses have a considerable influence on the quality and durability of parts made by methods of metal pressure-working. In the past, however, insufficient attention has been paid to the problem of determining their magnitude and the nature of distribution of these stresses in different technological processes in automatic-forging production. In the leading branches of mechanical engineering, technological processes are evaluated on the basis of the magnitude and extent of the residual stresses in the finished parts. For example, the technological process of manufacturing engine blades is evaluated in this manner in the aircraft construction industry. The tensile residual stresses that develop during bending on the internal surface of parts that are cylindrical in shape constitutes a danger in the presence of aggressive media. Thus, corrosion cracking of apparatus occurs in the chemical and petroleum machine building industry. In addition, residual stresses considerably reduce strength during operation under conditions of varying stress. Residual stresses can usually be removed by thermal working of the parts. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 23, 1971
- Accession Number
- AD0727248
Entities
People
- I. V. Tkachev
- V. I. Davydov
Organizations
- National Air and Space Intelligence Center