CREEP CONTINUUM DAMAGE CONSTITUTIVE-EQUATIONS FOR THE BASE, WELD AND HEAT-AFFECTED ZONE MATERIALS OF A SERVICE-AGED 1 2CR1/2MO1/4V-21/4CR1MO MULTIPASS WELD AT 640-DEGREES-C/
Th. Hyde et al., CREEP CONTINUUM DAMAGE CONSTITUTIVE-EQUATIONS FOR THE BASE, WELD AND HEAT-AFFECTED ZONE MATERIALS OF A SERVICE-AGED 1 2CR1/2MO1/4V-21/4CR1MO MULTIPASS WELD AT 640-DEGREES-C/, Journal of strain analysis for engineering design, 32(4), 1997, pp. 273-285
Creep continuum damage constitutive equations have been determined for
the base, weld and heat-affected zone materials of a service-aged 1/2
Cr 1/2Mo1/4V:2 1/4Cr1Mo multipass weld at 640 degrees C. The base and
weld material properties were determined from uniaxial creep and notch
ed bar creep rupture test results. The properties of the heat-affected
zone material were determined from impression creep tests, waisted cr
oss-weld specimen tests and notched cross-weld specimen tests. At the
test temperature of 640 degrees C, surface oxidation occurs. For the u
niaxial creep and notched bar creep tests, this oxidation was consider
ed not too significant. However, for the low-load impression creep tes
ts, the oxidation depth was comparable to the indentation depth.