Effect of Microstructure on High Cycle Fatigue and Fatigue Crack Propagation Behaviors of β-Annealed Ti–6Al–4V Alloy

Choi, Heesoo; Kim, Sumin; Kwon, Youngeun; Goto, Masahiro; Kim, Sangshik

doi:10.1007/s12540-019-00598-4

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…It has been well established that fatigue life consists of initiation life (N I ) and propagation life (N P ), and relatively large portion of HCF life is used for the initiation of crack. 46,47 N I may vary depending on the mechanism of crack initiation, such as cracking at carbides, GBs and PSBs. 48,49 In general, the ease of crack initiation has often been correlated to tensile strength of metals, causing slip deformation and cracking at certain microstructural features (i.e., inclusions and GBs).…”

Section: Resultsmentioning

confidence: 99%

“…The overall resistance to LCF at 650°C was greater for the F1 specimens than the F2 specimens, and those prepared from the periphery tended to have higher resistance to LCF than those from the center. It has been well established that fatigue life consists of initiation life (N I ) and propagation life (N P ), and relatively large portion of HCF life is used for the initiation of crack 46,47 . N I may vary depending on the mechanism of crack initiation, such as cracking at carbides, GBs and PSBs 48,49 .…”

Section: Resultsmentioning

confidence: 99%

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Effect of microstructure on low cycle fatigue behavior of Inconel 706 at 650°C

Lee,

Kim,

Kim

et al. 2023

Fatigue Fract Eng Mat Struct

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Four different types of specimens were prepared from the center and the periphery of two large IN706 forged discs of commercial scale, and low cycle fatigue (LCF) tests were conducted at 650°C.The IN706 specimens with lower LCF lives showed relatively large fraction of cleavage‐like fracture along linearly aligned η (Ni3Ti) precipitates in the area of crack propagation. The amount of η precipitates for those specimens with greater LCF lives was negligible, and the fracture mode of crack propagation was dominantly intergranular. Crack initiation was mainly by persistent slip band (PSB) cracking at the surface, and no notable difference was found for each specimen. The correlation between tensile properties, grain size, and LCF lives of IN706 at 650°C appeared to be not as significant as expected.

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