Materials which have previously been rejected for use in certain applications are once again being considered. Such is the current case involving the use of quenched and tempered low alloy Cr Mo steels for pressure vessel construction. When heat treated in this manner this material produces a bainitic microstructure which has improved short term strength characteristics. It has been found, however, that the bainitic microstructure softens significantly under cyclic loading. To gain an understanding of the limiting stress/strain range which will induce significant softening, a time independent uniaxial constitutive model of strain induced softening has been developed. This model was formulated from a given set of elevated temperature cyclic test results.
|Original language||English (US)|
|Number of pages||7|
|Journal||American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP|
|State||Published - Jan 1 1987|
ASJC Scopus subject areas
- Mechanical Engineering