Investigation of crack initiation and propagation behavior of AISI 310 stainless steel up to very high cycle fatigue

The significance of ultrafine film-like retained austenite in governing very high cycle fatigue behavior in an ultrahigh-strength MN–SI–Cr–C steel

“…Thus, the values of σ w9 /R m and σ w9 /HV are ~0.52 and 1.61, respectively, which are significantly higher than those reported for steels in the literature [24][25][26][27]. In general, it is considered that the fatigue limit of ultrahigh strength steels is governed by hardness and retained austenite (e.g.…”

“…The submicron/nanometer-sized film-like retained austenite can increase grain boundary area, absorbs and transmits dislocation, and contributes to TRIP effect, improving very high cycle fatigue properties of BQ&P steels. were reviewed in references [24][25][26][27]. (The value σ w9 / R m of bainite-based quenching and partitioning steel is higher than other steels).…”

“…8 [24][25][26][27]. The fatigue limit for no failure condition up to 10 9 cycles reported in the literature was estimated by "up and down" approach [23].…”

Effect of ultrasonic nanocrystal surface modification on the characteristics of AISI 310 stainless steel up to very high cycle fatigue

“…The S–N curve of the material showed a substantial improvement in the fatigue life in all specimens. The alloy showed surface cracking up to 10 9 cycles before the UNSM treatment . However, the UNSM‐treated specimens showed subsurface cracking beyond 10 7 cycles.…”

Very high cycle fatigue behaviors of bainite/martensite multiphase steel treated by quenching-partitioning-tempering process

“…The fatigue crack initiation within VHCF regimes is generally divided in two types [3][4][5]: (i) the cracks initiate from surface of the specimens due to the defects, pores, heterogeneities and other potential stress concentration region at surface [3]; (ii) the cracks initiate from the subsurface or interior of specimens , which is characterized by so-called "fish-eye" surrounding a "fine granular area (FGA)" [1] in the vicinity of an inclusion (also called optically dark area, ODA [6] and bright granular facet, GBF [2]). In general, the inclusions in steels have a significant influence on the fatigue crack initiation and fatigue life [7][8][9][10].…”