The low-cycle fatigue, deformation and final fracture behaviour of an austenitic stainless steel

Ye, Duyi; Matsuoka, Saburo; Nagashima, Nobuo; Suzuki, Naoyuki

doi:10.1016/j.msea.2005.09.081

Cited by 151 publications

(66 citation statements)

References 25 publications

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“…As can be seen in Fig. 2 b), the strain hardening increases with increasing applied strain amplitude, as also observed in conventional austenitic stainless steels, such as AISI 304L, AISI 316 and SUS304-HP [22]. Furthermore, a small reduction of the mean stress σ m , taken at the half number of cycles to failure, can be observed with increasing total strain amplitude.…”

Section: Low Cycle Fatigue Behaviorsupporting

confidence: 75%

Low cycle fatigue behavior and microstructure of a high alloyed metastable austenitic cast TRIP-steel

Glage

Weidner

Richter

et al. 2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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Abstract. Total strain-controlled low-cycle fatigue tests were performed at room temperature on a high alloyed metastable austenitic stainless cast steel in the range of 1x10 -3 ≤ Δ t/2 ≤ 3x10 -2 at constant strain rate of 4x10 -3 s -1 . The cyclic stress response revealed combinations of cyclic hardening, saturation and cyclic softening, depending on the applied cyclic total strain amplitude. Total strain amplitudes higher than 8x10-3 result in a pronounced secondary hardening up to fracture. In the case of metastable austenitic steels, at higher strain amplitudes the secondary hardening is an indicator for the austenitic-martensitic transformation. The deformation-induced α'-martensite content was detected using a nondestructive magnetic measuring technique (feritscope). The microstructure was investigated for different total strain amplitudes applying optical and scanning electron microscopy (SEM). It could be observed that with an increasing total strain amplitude the deformation band density increased considerably.

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Section: Low Cycle Fatigue Behaviorsupporting

confidence: 75%

Low cycle fatigue behavior and microstructure of a high alloyed metastable austenitic cast TRIP-steel

Glage

Weidner

Richter

et al. 2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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“…12). These curves show three common phases for austenitic stainless steels subjected to moderate strain amplitude (less than 0.8%) [40,41]. (i) A first hardening phase during the first cycles (from 1 to 10 cycles), more important that the amplitude of plastic deformation is higher.…”

Section: Cyclic Hardening Model For the Base Materialsmentioning

confidence: 99%

Evaluation of residual stress relaxation and its effect on fatigue strength of AISI 316L stainless steel ground surfaces: Experimental and numerical approaches

Laamouri

Sidhom

Braham

2013

International Journal of Fatigue

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This paper is aimed at evaluating the residual stress relaxation and its effect on the fatigue strength of AISI 316L steel ground surfaces in comparison to electro-polished surfaces. An experimental evaluation was performed using 3-point and 4-point bending fatigue tests at R r = 0.1 on two sets of notched specimens finished by electro-polishing and grinding. The residual stress fields were measured at the notch root of specimens, before and after fatigue tests, by means of the X-ray diffraction technique. It was found a degradation of about À35% for the 4-point bending fatigue limit at 2 Â 10 6 cycles of the ground specimens in comparison to the electro-polished ones. This degradation is associated with a slight relaxation of the grinding residual stresses which remain significant tensile stresses at the stabilized state. While under the 3-point bending test, these residual stresses relax completely and provoke a noticeable increase of the fatigue limit estimated at about 50% in comparison to the 4-point bending fatigue test. The numerical evaluation of residual stress relaxation was carried out by FE analyses of the cyclic hardening behaviour of the ground layer. The isotropic and nonlinear kinematic model proposed by Chaboche was used and calibrated for the base material and the ground layer. The results show that residual stresses relax to a stabilized state characterized by elastic-shakedown response. This stabilization is occurred after the first cycle of the 4-point bending test corresponding to the higher stress concentration (K t4p = 1.66), while it requires many cycles under the 3-point bending test corresponding to the lower stress concentration (K t-3p = 1.54). The incorporation of stabilized residual stress values into the Dang Van's criterion has permitted to predict with an acceptable accuracy the fatigue limits under both bending modes.

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“…This stored energy discrepancy represented by the loop area difference may be attributed to the degree of the heat dissipation and intersected bands martensite phase transformation, which favor at high strain rate and will be described in the later section. Based on the Basquin and Coffin-Manson equation analysis [3], the elastic and plastic strain parts can be dissociated from the total strain and given two different straight lines, representing the elastic parts and plastic parts, respectively, on a log-log plot. The equation for the elastic strain amplitude (H e ) is given by (2) and that for the plastic strain amplitude (H p ) is (3) The variation of the fatigue life, in terms of the number of reversals to failure (2N f ), with H e , H p , and total strain amplitude (H a ), is analyzed by combining H e and H p , which can be expressed in the form (4) where , b, , and c are the fatigue strength coefficient, fatigue strength exponent, fatigue ductility coefficient, and fatigue ductility exponent, respectively.…”

Section: Cyclic Stress-strain Curves and Lifementioning

confidence: 99%

“…The Coffin-Manson law emphasizes the relevance of cyclic plastic strain for fatigue life evaluation. Based on analysis performed with the Basquin and CoffinManson equations [3,4], the elastic and plastic strain parts can be dissociated from the total strain to yield two different straight lines on a log-log plot. Subsequently, the fundamental role of cycle plastic strain in fatigue crack initiation and growth was documented.…”

Section: Introductionmentioning

confidence: 99%

“…The LCF life depended on the amount of martensite present, strain amplitude, grain size, and whether crack initiation or propagation controlled fatigue life at a given strain amplitude. The LCF properties deteriorated on martensite formation, owing to more crack initiating sites becoming available [3]. With the proper volume fraction of martensites controlled, a large strain can be obtained even at a low deformation temperature.…”

Section: Introductionmentioning

confidence: 99%

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Cyclic deformation and phase transformation of 6Mo superaustenitic stainless steel

Wang

Chen

et al. 2007

Met. Mater. Int.

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A fatigue behavior analysis was performed on superaustenitic stainless steel UNS S31254 (Avesta Sheffield 254 SMO), which contains about 6 wt.% molybdenum, to examine the cyclic hardening/softening trend, hysteresis loops, the degree of hardening, and fatigue life during cyclic straining in the total strain amplitude range from 0.2 to 1.5 %. Independent of strain rate, hardening occurs first, followed by softening. The degree of hardening is dependent on the magnitude of strain amplitude. The cyclic stress-strain curve shows material softening. The lower slope of the degree of hardening versus the strain amplitude curve at a high strain rate is attributed to the fast development of dislocation structures and quick saturation. The H martensite formation, either in band or sheath form, depending on the strain rate, leads to secondary hardening at the high strain amplitude of 1.5 %.

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The low-cycle fatigue, deformation and final fracture behaviour of an austenitic stainless steel

Cited by 151 publications

References 25 publications

Low cycle fatigue behavior and microstructure of a high alloyed metastable austenitic cast TRIP-steel

Low cycle fatigue behavior and microstructure of a high alloyed metastable austenitic cast TRIP-steel

Evaluation of residual stress relaxation and its effect on fatigue strength of AISI 316L stainless steel ground surfaces: Experimental and numerical approaches

Cyclic deformation and phase transformation of 6Mo superaustenitic stainless steel

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