On the high cycle fatigue behavior of a type 304L stainless steel at room temperature

Metastability and fatigue behavior of austenitic stainless steels

“…Because, the fcc austenite has a lower strength compared to the bcc α'-martensite [11], it can be defined as the matrix and the α'-martensite as reinforcements of a "dynamically composite material" with a changing volume fraction and distribution of α'-martensite during mechanical monotonic and cyclic loading. Because α'-martensite formation leads to cyclic hardening, and this formation consequently influences significantly the fatigue life of metastable austenitic steels [11][12][13][14][15][16][17][18][19][20][21][22], it is important to have a reliable method for determining susceptibility to deformation induced α'-martensite formation. The susceptibility depends generally on two parameters: (i) the metastability of the initial austenitic microstructure, as a function of its chemical composition [4][5][6][7] and grain size [23], and (ii) the loading conditions such as load temperature [16,[19][20] and deformation rate [22].…”

Evolution of dislocations and twins in high cycle fatigue of a twinning-induced plasticity steel

“…The FL (corresponding to a fatigue life of 2 Â 10 6 cycles) is determined to be 300 MPa, which is equal to 78.7% of the YS and 28.6% of the UTS. As shown in Table 2, the fatigue performance of the present TWIP steel is worse than those of the austenitic stainless steels [20,21] in terms of the ratios of FL/ YS and FL/UTS (these austenitic stainless steels were also subjected to fully reverse tension-compression tests), while the present TWIP steel has much superior mechanical properties in monotonic deformation. As the excellent mechanical properties of the present TWIP steel in monotonic tensile test depend largely on the intense deformation twinning during plastic deformation [3], the normal high cycle fatigue property may be due to the absence of deformation twinning during cyclic loading.…”

“…Static and fatigue properties of the present TWIP steel and two austenitic stainless steels (data adopted from [20,21] …”

Investigations into the cumulative fatigue life of an AISI 304L austenitic stainless steel used for pressure water reactors: Application of a double linear damage rule

“…Note that a significant cyclic plasticity occurs, even at the lowest strain-amplitudes used in this campaign: De p /2 = ±0.10% for De t / 2 = ±0.20%. Furthermore, previous tests performed up to 5.10 6 cycles show that the endurance limits are about De t /2 = ±0.175% and Dr/2 = ±190 MPa respectively in strain-controlled and stresscontrolled conditions [15], whereas the ratio between this stress endurance limit and Young's modulus would give De t /2 = ±0.095%. In fact, a non-negligible plastic part is still detected even well below the endurance limit.…”

“…In fact, a non-negligible plastic part is still detected even well below the endurance limit. Referring to the endurance limit determined previously in [15], a value of 0.175 can be considered as a constant part of Langer's equation.…”