Monotonic and cyclic stress-strain response of annealed 2 1/4 Cr--1 Mo steel

Conference · Wed Jan 01 04:00:00 EST 1975

OSTI ID:4174246

Jaske, C E; Leis, B N; Pugh, C E

The stress-strain response of isothermally annealed 2$sup 1$$/$$sub 4$ Cr-- 1 Mo steel under monotonic and cyclic loadings was characterized at 21 to 593$sup 0$C. Monotonic stress-strain curves were developed for uniaxial tensile loading of speciments at strain rates of 8.33 x 10$sup -5$ and 8.33 x 10$sup -6$ s$sup -1$. The cyclic stress-strain response was measured for the first 100 fully reversed strain cycles at strain ranges between 0.4 and 3.0 percent under uniaxial loading at a strain rate of 8.33 x 10$sup -5$ s$sup -1$. The effects of creep, stress-relaxation, and thermal-exposure hold periods on the cyclic stress- strain behavior were also investigated at 510$sup 0$C. Monotonic stress-strain curves were quantified using a power law relation between stress range and plastic-strain range. Cyclic hardening was observed at temperatures up to 427$sup 0$C. A mixture of initial cyclic hardening followed by later cyclic softening was seen at temperatures from 482 to 538$sup 0$C, and cyclic softening was observed at 593$sup 0$C. One measure of the cyclic stress-strain response was characterized by the ascending path of the stress-strain hysteresis loop for the tenth cycle. The reported results form part of the data base to be used by others in formulating similar general inelastic constitutive equations for analysis of 2$sup 1$$/$$sub 4$ Cr-1 Mo steel components. (auth)

• Research Organization: Oak Ridge National Lab., Tenn. (USA); Battelle Columbus Labs., Ohio (USA)
• NSA Number: NSA-33-005961
• OSTI ID: 4174246
• Report Number(s): CONF-751106--6
• Country of Publication: United States
• Language: English

Related Subjects

*CHROMIUM-MOLYBDENUM STEELS-- MECHANICAL PROPERTIES
360103* --Materials--Metals & Alloys--Mechanical Properties
HIGH TEMPERATURE
HYSTERESIS
LMFBR TYPE REACTORS
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
STEAM GENERATORS
STRAIN HARDENING
STRAINS
STRESSES