A Comparative Evaluation of the Effect of Low Cycle Fatigue and Creep–Fatigue Interaction on Surface Morphology and Tensile Properties of 316L(N) Stainless Steel

Evaluation of the effect of various prior creep-fatigue interaction damages on subsequent tensile and creep properties of 9%Cr steel

“…It has been reported that high temperature fatigue loading not only induces microstructure evolution but also alters the surface features [18,19]. In our previous studies, surface alternation due to prior LCF has also been discussed, in which the surface crack did not appear [26,47].…”

“…Therefore, it is significant to evaluate the effect of prior fatigue loading on remnant tensile and creep properties to ensure the safety of high temperature components. Previous works have revealed that the material tensile and creep properties could be altered by prior LCF loading [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. However, the studies about the influence of prior C-F loading on subsequent tensile and creep properties are still limited.…”

“…Mocko et al [12][13][14] found that the yield stress and ultimate stress of DP500 steel could be increased by stress-controlled prior LCF loading and he also proposed a constitutive model to predict the uniaxial tensile behavior after LCF loading [15,16]. Shankar et al [17][18][19] further pointed out that both LCF and C-F loading degraded the tensile strength of modified 9Cr-1Mo steel and the increase of temperature led to additional decline of tensile properties. Regarding the remnant creep properties after prior fatigue loading, the prior LCF generally accelerates the creep rate and reduces the creep life of Cr-Mo steel [20][21][22][23][24].…”

A modified constitutive model for tensile deformation of 9%Cr steel under prior fatigue loading

“…Among these models, constitutive models for tensile deformation should first be considered, since they enable the determination of the yield stress, which is of crucial concern for the component design and manufacture. However, tensile properties can be altered by in-service loadings, particularly the low cycle fatigue (LCF) and creep fatigue interaction (C-F) loadings Sánchez-Santana et al, 2009;Moćko et al, 2014;Moćko et al, 2015;Mariappan et al, 2015;Mariappan et al, 2016;Mariappan et al, 2017). Such complicated loading conditions may result in premature failure if the component design depends only on the original state.…”

“…Over the past several years, intensive experimental investigations have been conducted to evaluate the remnant tensile resistance under prior fatigue loading Mariappan et al, 2017;Paul et al, 2010;Paul et al, 2011;Hamdoon et al, 2011). It has been revealed that the effect of prior fatigue loading on remnant tensile properties depends on both loading and material types, e.g., for 304LN (Paul et al, 2010;Paul et al, 2011), 316L (Mariappan et al, 2015;Mariappan et al, 2016), AISI 1022 (Hamdoon et al, 2011) and TiAl6V4 (Moćko et al, 2014) alloys, the prior fatigue loading slightly strengthened the remnant tensile strength, whereas for AISI 4140-T Sánchez-Santana et al, 2009) and 9%Cr (Mariappan et al, 2015;Mariappan et al, 2017) steels, the prior fatigue loading degraded the subsequent tensile properties. Microstructural analysis illustrates that the evolution of remnant tensile properties of stainless steel is mainly attributed to the alternation of dislocation density and subgrain size during the prior fatigue process (Mariappan et al, 2015;Paul et al, 2010).…”