Experimental Study of Biaxial Creep Damage for Type 304 Stainless Steel

2002 ◽  
Vol 11 (3) ◽  
pp. 247-262 ◽  
Author(s):  
Masao Sakane ◽  
Hiroto Tokura
Keyword(s):  
Stainless Steel ◽  
Biaxial Tension ◽  
Crack Opening ◽  
Equivalent Stress ◽  
Creep Damage ◽  
304 Stainless Steel ◽  
Creep Tests ◽  
Biaxial Creep ◽  
Type 304 ◽  
Type 304 Stainless Steel

This paper studies the biaxial creep damage of type 304 stainless steel at 923 K. Biaxial tension creep tests were carried out using cruciform specimens and the effect of stress biaxiality on rupture lifetime and creep voiding was discussed. Mises equivalent stress and the equivalent stress based on crack opening displacement were a suitable parameter to assess the biaxial creep damage. The equivalent stress proposed by Huddleston overestimated the biaxial creep damage by more than a factor of two. Stress biaxiality had almost no influence on the orientation of voided grain boundaries and the critical value ofparameter A. Tests of alternative loading direction significantly dispersed the biaxial creep damage resulting in larger creep lifetime.

Experimental Evaluation of Creep Constitutive Equations for Type 304 Stainless Steel Under Non-Steady Multiaxial States of Stress

1986 ◽  
Vol 108 (2) ◽  
pp. 119-126 ◽  
Author(s):  
S. Murakami ◽  
N. Ohno ◽  
H. Tagami
Keyword(s):  
Stainless Steel ◽  
Creep Behavior ◽  
Stress Change ◽  
304 Stainless Steel ◽  
Test Time ◽  
Surface Model ◽  
Creep Tests ◽  
Type 304 ◽  
Type 304 Stainless Steel ◽  
Multiaxial Loadings

In order to evaluate the validity and limitations of the creep-hardening surface model proposed by the present authors, a series of creep tests for type 304 stainless steel were performed at 600°C under various non-steady multiaxial loadings. The test time and the interval of stress change were 960 hr and 48 or 96 hr, respectively, and five kinds of stress histories consisting of randomly varying stress magnitude, stress direction and interval of stress change were employed. It was found that the creep-hardening surface model describes sufficiently well the creep behavior observed in this work.

Effect of CO2 on the Strength and Ductility of Type 304 Stainless Steel at Elevated Temperatures

CORROSION ◽  
1963 ◽  
Vol 19 (5) ◽  
pp. 157t-164t ◽  
Author(s):  
W. R. MARTIN ◽  
H. E. McCOY
Keyword(s):  
Stainless Steel ◽  
Creep Rate ◽  
Elevated Temperatures ◽  
Equivalent Stress ◽  
Stress Rupture ◽  
304 Stainless Steel ◽  
Tensile Fracture ◽  
Type 304 ◽  
Type 304 Stainless Steel ◽  
Strength And Ductility

Abstract One of the important problems in determining the usefulness of stainless steels as cladding materials in high-temperature gas-cooled reactors is the effect of chemical reactions between clad and coolant on the cladding strength and ductility. The mechanism by which the coolant (CO2 in this investigation) affects the strength properties of Type 304 stainless steel are being investigated in the range 1300 to 1700 F (704–927 C). Creep- and stress-rupture results obtained on sheet materials in wet and dry CO2 and argon are compared. The effect of annealing in CO2 on the tensile strength and ductility is also reported. The question of whether the strengthening observed in CO2 was due to oxidation or carburization was investigated. Experiments on the effect of various partial pressures of oxygen in argon showed that the creep rate was minimum at approximately 10 ppm. The creep rate in CO2 at equivalent stress and temperature was one-third the minimum rate observed in oxygen. Chemical analyses, metallography, and experiments with isotopic carbon showed that carburization occurred in pure flowing CO2 in the temperature range studied. From this evidence it was concluded that the strengthening observed in CO2 was primarily due to carburization. The creep- and tensile-fracture strains were adversely affected by exposure to CO2 with the magnitude of the effect dependent on the time and temperature of exposure.

An Inelastic Constitutive Model for Monotonic, Cyclic, and Creep Deformation: Part II—Application to Type 304 Stainless Steel

1976 ◽  
Vol 98 (2) ◽  
pp. 106-112 ◽  
Author(s):  
A. Miller
Keyword(s):  
Stainless Steel ◽  
Rate Sensitivity ◽  
Tensile Tests ◽  
Standard Test ◽  
304 Stainless Steel ◽  
Deformation Model ◽  
Creep Tests ◽  
Creep Fatigue ◽  
Type 304 ◽  
Type 304 Stainless Steel

For the deformation model developed in Part I, material constants are calculated from standard test data on type 304 stainless steel. With them, simulations are made of various types of tests, including tensile tests, strain-rate sensitivity, creep tests with stress drops, strain-controlled cycling, and creep-fatigue interaction. The simulations show general agreement with the corresponding experimental data for type 304, but in a few respects, quantitative improvements are required. Implications of the strengths and weaknesses of the new model are discussed.

OUTOKUMPU TYPE 630

Alloy Digest ◽  
2016 ◽  
Vol 65 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
High Performance ◽  
High Strength ◽  
Heat Treating ◽  
304 Stainless Steel ◽  
Type 304 ◽  
Type 304 Stainless Steel

Abstract Outokumpu Type 630 is a martensitic age hardenable alloy of composition 17Cr-4Ni. The alloy has high strength and corrosion resistance similar to that of Type 304 stainless steel. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1238. Producer or source: Outokumpu High Performance Stainless.

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