Creep rupture life and damage evaluation under multiaxial stress state for type 304 stainless steel

Zhang, Shengde; Wakai, Takashi; Sakane, Masao

doi:10.1016/j.msea.2008.04.113

Cited by 19 publications

(2 citation statements)

References 7 publications

(12 reference statements)

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“…A uniform equi-triaxial stress condition is achieved in the volume of 2 mm × 2 mm × 2 mm at the center part of the cubic specimen that was also confirmed by a finite element analysis. Creep tests were performed using in-house biaxial and triaxial creep testing machines of which the details are presented elsewhere [2,3]. Biaxial tension creep tests were intermitted to observe void formation at grain boundaries and run out to obtain rupture lifetimes.…”

Section: Biaxial and Triaxial Creep Test Proceduresmentioning

confidence: 99%

Creep Void Formation and Rupture Lifetime in Multiaxial Stress States

Sakane

Kobayashi

Ohki

et al. 2019

KEM

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This paper discusses creep void formation and rupture lifetimes in multiaxial stress states for a SUS 304 stainless steel at elevated temperatures. Biaxial and triaxial tension creep tests were performed using a cruciform and a cubic specimen, respectively. These two types of the specimens were designed to achieve uniform equi-biaxial and equi-triaxial stress distributions by a finite element analysis in the gage parts. Void formation at grain boundaries was observed by intermitting biaxial creep tests and by interrupting triaxial creep tests. Creep rupture lifetimes were also obtained in biaxial and triaxial creep tests. Biaxial stresses increase the void formation but give a little influence on a creep rupture lifetime in the correlation with von Mises equivalent stress. Triaxial stresses also increase the void formation and drastically reduce a creep rupture lifetime in the correlation with von Mises equivalent stress. Evident void formation in an equi-triaxial stress condition demonstrates that von Mises equivalent stress is not a suitable measure to evaluate creep damage development in multiaxial stress states. A new equivalent stress is proposed to evaluate creep rupture lifetimes in biaxial and triaxial stress states.

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Section: Biaxial and Triaxial Creep Test Proceduresmentioning

confidence: 99%

Creep Void Formation and Rupture Lifetime in Multiaxial Stress States

Sakane

Kobayashi

Ohki

et al. 2019

KEM

Self Cite

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“…Although it is essential for safety high temperature structure designing to make clear the creep rupture time and the creep properties under multiaxial stress conditions, there is little experimental research paper on multiaxial creep [1][2][3]. The reason for the small number of experimental study on multiaxial creep may be there is no commercial creep testing apparatus which can conduct experiments under multiaxial stress condition.…”

Section: Introductionmentioning

confidence: 99%

Development of Tension-Torsion Multiaxial Creep Testing Apparatus for Heat Resisting Steel

Hiyoshi

Iriyama

2018

MATEC Web of Conferences

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Abstract. This paper describes development of a combined tensiontorsion multiaxial creep testing apparatus for heat resisting steel. It is essential for high temperature component designing to investigate creep rupture life and creep properties of heat resisting steel. Although high temperature structural components undergo multiaxial stress damage due to complex loading situation or shape discontinuity of the actual structure, there is no commercial testing apparatus which can conduct a creep testing under multiaxial stress conditions. In this study, we developed a combined tension-torsion multiaxial creep testing apparatus which can apply multiaxial stress to a hollow cylinder type testing specimen with 6 kN axial load and 12 Nm torsional load at high temperatures. Since the testing apparatus also has measuring devices for axial and shear displacements of the specimen, relationship curve between testing time and equivalent strain under multiaxial stress conditions of type 304 stainless steel is also discussed.

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Effect of multiaxial stress and strain on low cycle fatigue, creep and creep‐fatigue lifetimes for type 304 steel cruciform and cubic specimens

Sakane

2018

Materialwissenschaft Werkst

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This paper discusses low cycle fatigue, creep and creep‐fatigue life evaluation methods for a SUS 304 austenitic stainless steel in a full range of strain and stress multiaxiality using a cruciform and cubic specimen. Five multiaxial strain parameters are investigated whether or not they appropriately express the trend of low cycle fatigue lives in the full range of biaxial stress state. Then, the effects of the stress biaxiality and triaxiality on creep void formation are discussed. The stress biaxiality and triaxiality raise the creep void formation and the void formation is confirmed even in an equi‐triaxial tension creep test in which the value of von Mises equivalent stress is zero. However, the stress biaxiality slightly shortens creep rupture lifetimes but the stress triaxiality drastically reduces creep rupture lifetimes. Finally, the effect of strain biaxiality on creep‐fatigue life is discussed based on the experimental results using a cruciform specimen by applying the linear damage rule. The predicted results of creep‐fatigue lives under biaxial strain states are slightly dependent on the applied multiaxial strain and stress parameters but there is no significant difference in the predicted lives depending on the multiaxial strain and stress parameters.

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Creep rupture life and damage evaluation under multiaxial stress state for type 304 stainless steel

Cited by 19 publications

References 7 publications

Creep Void Formation and Rupture Lifetime in Multiaxial Stress States

Creep Void Formation and Rupture Lifetime in Multiaxial Stress States

Development of Tension-Torsion Multiaxial Creep Testing Apparatus for Heat Resisting Steel

Effect of multiaxial stress and strain on low cycle fatigue, creep and creep‐fatigue lifetimes for type 304 steel cruciform and cubic specimens

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