Microrelief of fatigue fractures of aluminum alloy samples during high frequency loading

Ботвина, Л. Р.; Shabalina, V. N.; Zhegina, I. P.; Stoida, Yu. M.

doi:10.1007/bf00724474

Cited by 5 publications

(4 citation statements)

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“…Figure 2 shows a relationship between stress amplitude and fatigue life. [6][7][8]15 Figure 6 shows the dislocation cell structures formed underneath the fracture surface. Figure 3 shows overview of the fracture surfaces obtained from the fatigue tests.…”

Section: Fatigue Tests and Fractographic Characterizationmentioning

confidence: 99%

“…Beyond the critical crack length at which striation spacing starts increasing, the linear relationship between striation spacing and crack length corresponds to the generally known linear relationship between mechanically small crack length and FCGR. [6][7][8]15 Figure 6 shows the dislocation cell structures formed underneath the fracture surface. The size of the cells were calculated using linear intercept method and reported in Table 2.…”

Section: Fatigue Tests and Fractographic Characterizationmentioning

confidence: 99%

“…For instance, in pure iron, steels and copper, striation spacing does not correspond to FCGRs at small crack lengths. 8 These facts are regarded to be important to validate the estimation of FCGR at small cracks in structural components consisting of steels and aluminium alloys. 7 Similar facts have been also reported in aluminium alloys.…”

Section: Introductionmentioning

confidence: 99%

“…7 Similar facts have been also reported in aluminium alloys. 8 These facts are regarded to be important to validate the estimation of FCGR at small cracks in structural components consisting of steels and aluminium alloys.…”

Section: Introductionmentioning

confidence: 99%

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Minimum fatigue striation spacing and its stress amplitude dependence in a commercially pure titanium

Ahmed

Islam

Yin

et al. 2019

Fatigue Fract Eng Mat Struct

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We report the fatigue striation spacing of commercially pure titanium with respect to stress amplitude. Rotating bending fatigue tests were performed at 150, 175, 200 and 227 MPa in which samples did not fail at 150 MPa. No fatigue striation up to a certain crack length is observed for the studied conditions. For each condition, a minimum striation spacing value is found that decreases from 0.45 to 0.36 to 0.24 μm with increasing stress from 175 to 200 to 227 MPa, respectively. The minimum striation spacing remains constant up to a certain crack length for each condition. Thereafter, it starts increasing with crack length. It is quite understandable that the constant striation spacing over a certain crack length may not represent the macroscopic fatigue crack growth rate. The fatigue crack growth mechanism during the constant striation spacing region has been discussed in detail. K E Y W O R D Scommercially pure titanium, fractrography, metal fatigue, fatigue striation

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Section: Fatigue Tests and Fractographic Characterizationmentioning

confidence: 99%