Cyclic stress-strain behavior of ERNiCr-3 weld filler metal

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6428075

Baylor, V. B.; Booker, M. K.; Strizak, J. P.; Klueh, R. L.

Analytical representations were developed for the fatigue life and cyclic stress-strain resonse of AWS A5.14 Class ERNiCr-3 as observed during strain controlled cycling at a strain rate of 4 x 10/sup -3//s over strain ranges from 0.35 to 3.0% at 25, 343, 538, and 593/sup 0/C. Specific areas studied include fatigue life as a function of strain, cyclic hardening and softening during testing, development of cyclic stress-strain curves from stress-strain amplitude coordinates, and development of bilinear representations of cyclic stress-strain behavior as suggested by current advanced design techniques. At elevated temperatures, the fatigue life of ERNiCr-3 is reduced and the material cyclically hardens. At room temperature, some hardening due to cycling is displayed initially, followed by softening early in the test. The bilinear constants, E/sub m/ and C, are independent of temperature and strain rate, however, K/sub i/ is not. The power law, ..delta..sigma = A(..delta..epsilon/sub p/)/sup n/, adequately describes the cyclic stress-strain behavior at low strains. By bilinearization, the power law can be extended to predict K/sub i/.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6428075
• Report Number(s): CONF-781202--31
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
FATIGUE
FILLER METALS
HARDENING
INCONEL 82
INCONEL ALLOYS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
STRAIN HARDENING
STRAINS
STRESS ANALYSIS
STRESSES
TANTALUM ALLOYS
THERMAL CYCLING
THERMAL FATIGUE
THERMAL STRESSES