Creep constitutive equations for cold-drawn 304L stainless steel

Tahami, Farid Vakili; Daei-Sorkhabi, A. H.; Biglari, F. R.

doi:10.1016/j.msea.2010.04.055

Cited by 28 publications

(7 citation statements)

References 16 publications

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“…The deformation of the cladding was modeled using time-independent elastoplastic data in conjunction with the temperature dependent constitutive equations for creep as studied elsewhere [32][33][34][35]. The strength of 304SS decreases with increasing temperature while other mechanical parameters vary [32,[36][37][38][39].…”

Section: Heat Exchangermentioning

confidence: 99%

“…To account for the dramatic decreases in the elastic modulus, yield strength, and tensile strength at high temperatures, the mechanical data from Gardner et al [32] was used to index each property with respect to time and temperature during the simulated transient. For 304SS, the reference values for ultimate tensile strength, yield strength, and elastic modulus at room temperature were 709 MPa, 398 Mpa, and 187 Gpa, respectively [33]. Tahami et al [33] performed uniaxial creep tests on 304SS specimens and have determined the axial creep parameters for this alloy at various elevated temperatures close to those expected under a LOCA scenario.…”

Section: Heat Exchangermentioning

confidence: 99%

“…For 304SS, the reference values for ultimate tensile strength, yield strength, and elastic modulus at room temperature were 709 MPa, 398 Mpa, and 187 Gpa, respectively [33]. Tahami et al [33] performed uniaxial creep tests on 304SS specimens and have determined the axial creep parameters for this alloy at various elevated temperatures close to those expected under a LOCA scenario. These parameters can then be converted to hoop parameters using Hill's equation [40] in a manner congruent with Rosinger [41].…”

Section: Heat Exchangermentioning

confidence: 99%

“…Once the oxide thickness was determined and elasto-plastic strains calculated, 4 th order Runge Kutta was used to integrate the creep rate over each time step. The creep rate was assumed to follow the Norton Power Law (NPL) with axial creep parameters given in Table 3 by Tahami et al [33]. Note that NPL implies steady-state creep and the possibility of faster transient creep mechanisms were ignored.…”

Section: Heat Exchangermentioning

confidence: 99%

“…Fig. 13 is a contour plot that provides a side-by-side comparison of steady-state creep strain rate for Zircaloy-4 and 304SS [33,54]. Also included in that plot as scatter points, are the two steady state creep rates determined in Figure 9 for C35MN.…”

Section: Direct Comparison Of Cladding Behavior Between Zr-and Fe-basmentioning

confidence: 99%

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Cladding burst behavior of Fe-based alloys under LOCA

Massey

Terrani

Dryepondt

et al. 2016

Journal of Nuclear Materials

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Burst behavior of austenitic and ferritic Fe-based alloy tubes has been examined under a simulated large break loss of coolant accident. Specifically, type 304 stainless steel (304SS) and oxidation resistant FeCrAl tubes were studied alongside Zircaloy-2 and Zircaloy-4 that are considered reference fuel cladding materials. Following the burst test, characterization of the cladding materials was carried out to gain insights regarding the integral burst behavior. Given the widespread availability of a comprehensive set of thermo-mechanical data at elevated temperatures for 304SS, a modeling framework was implemented to simulate the various processes that affect burst behavior in this Febased alloy. The most important conclusion is that cladding ballooning due to creep is negligible for Fe-based alloys. Thus, unlike Zr-based alloys, cladding cross-sectional area remains largely unchanged up to the point of burst. Therefore, for a given rod internal pressure, the temperature onset of burst in Fe-based alloys appears to be simply a function of the alloy's ultimate tensile strength, particularly at high rod internal pressures.

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