Creep, Stress Relaxation and Biaxial Ratchetting of Type 304 Stainless Steel After Cyclic Preloading

1994 ◽  
Vol 116 (2) ◽  
pp. 133-141 ◽  
Author(s):  
Hiromasa Ishikawa ◽  
Katsuhiko Sasaki
Keyword(s):  
Stainless Steel ◽  
Stress Relaxation ◽  
Back Stress ◽  
Material Behavior ◽  
Cyclic Plasticity ◽  
304 Stainless Steel ◽  
Cyclic Shear ◽  
Creep Stress ◽  
Type 304 ◽  
Type 304 Stainless Steel

A series of tests for creep, stress relaxation, and biaxial ratchetting of type 304 stainless steel after cyclic preloading were carried out to investigate their interaction. The interesting fact was pointed out that back stress in cyclic plasticity played an important role to describe creep, relaxation, and biaxial ratchetting following cyclic preloading. Then, the test results showed that the material behavior due to creep after cyclic preloading could be represented by the modified Bailey-Norton law with stress levels evaluated from the current center of the yield surface, i.e., back stress which was determined by the hybrid constitutive model for cyclic plasticity proposed by the authors. In addition, biaxial ratchetting of axial strain induced by cyclic shear straining after cyclic preloading was expressed by the shear stress amplitude, the number of cycle and the axial stress level from the current center.

Effect of Prestrain on Stress Corrosion Cracking of Type 304 Stainless Steel by Means of the Stress Relaxation Method

CORROSION ◽  
1979 ◽  
Vol 35 (10) ◽  
pp. 456-460 ◽  
Author(s):  
HIDEHIKO KAMIDE ◽  
HIDEO SUGAWARA
Keyword(s):  
Stainless Steel ◽  
Stress Relaxation ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Annealing Temperature ◽  
Relaxation Method ◽  
304 Stainless Steel ◽  
Deformation Structures ◽  
Type 304 ◽  
Type 304 Stainless Steel

Abstract The relationship between the susceptibility of stress corrosion cracking (SCC) and the amount of deformation structures in Type 304 stainless steel in an H2SO4/NaCI solution system at room temperature was investigated by means of the stress relaxation method. SCC was observed in the prestrained specimens, whereas no cracking occurred in specimens without prestraining. The number of cracks was affected by the amount of deformation structures, which varied according to the annealing temperature after prestraining or according to the prestraining temperature. The results of magnetic measurements on the prestrained specimens as a function of the annealing temperature showed that the cracking region was in good agreement with the range of existence of strain induced α-martensites. Transmission electron microscope observation showed that ε- and α-martensites formed by prestraining at temperatures below 413 K (140 C) dissolved in preference to the austenite matrix. A strain induced martensite in Type 304 stainless steel seems to precede cracking in this system.

Biaxial ratcheting deformation of type 304 stainless steel: Effect of memorization of back stress

2004 ◽  
Vol 218 (9) ◽  
pp. 901-908 ◽  
Author(s):  
T Mayama ◽  
K Sasaki ◽  
H Ishikawa
Keyword(s):  
Stainless Steel ◽  
Constitutive Model ◽  
Shear Strain ◽  
Axial Stress ◽  
304 Stainless Steel ◽  
Shear Strain Rate ◽  
Cyclic Shear ◽  
Ratcheting Strain ◽  
Type 304 ◽  
Type 304 Stainless Steel

This paper treats both experiments and simulations of biaxial ratcheting. The experiments are conducted using a tubular specimen of type 304 stainless steel at room temperature. The specimen was subjected to cyclic shear straining under the axial superposed stress. The experiments show that the biaxial ratcheting strain was affected by the cyclic shear strain amplitude, the shear strain rate and the superposed stress level. Larger biaxial ratcheting strain occurred in the case of tensile superposed stress compared with that in the case of the compressive superposed stress. Moreover, even under the zero superposed stress, biaxial ratcheting strain occurred in the axial direction due to the cyclic shearing straining. Finally, the biaxial ratcheting behaviours were simulated by the unified constitutive model proposed by the authors. The characteristic features of the biaxial ratcheting behaviour, especially the axial strain due to the cyclic shear straining superposed on the zero axial stress, are well simulated by the constitutive model.

Description of Nonproportional Cyclic Plasticity of Stainless Steel by a Two-Surface Model

1991 ◽  
Vol 58 (3) ◽  
pp. 623-630 ◽  
Author(s):  
Yukio Takahashi ◽  
Takashi Ogata
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steels ◽  
Strain Range ◽  
Cyclic Plasticity ◽  
304 Stainless Steel ◽  
Surface Model ◽  
Path Condition ◽  
Type 304 ◽  
Type 304 Stainless Steel

A simple elastic-plastic constitutive model based on the two-surface theory is developed to describe deformation behavior of austenitic stainless steels under multiaxial cyclic loading. Dependency of saturated stress range both on strain range and the proportionality of loading is considered. To establish a precise procedure for determination of material constants for nonproportional loading, the intervariable relation in the axial-torsional circular strain-path condition is studied in detail. A full procedure is then developed for determination of all material parameters. Finally, the effectiveness of the present model is demonstrated by application to axial-torsional cyclic tests for type 304 stainless steel at 550°C.

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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