SEM&lt;i&gt; In Situ&lt;/i&gt; Study on Pre-Corrosion and Fatigue Cracking Behavior of LY12CZ Aluminum Alloy

Li, Xu Dong; Mu, Zhi Tao; Liu, Zhi Guo

doi:10.4028/www.scientific.net/kem.525-526.81

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…All aluminum specimens were subjected to accelerated corrosion testing using ZJF-45 period immerse box, and the immersion time was 5 minutes and the roast time was 12 minutes, which accelerated 348 cycles equal to corrode one year outfield [2] . The pH of solution was maintained 4.2, and the specimens were subjected to accelerated corrosion damage equivalent to 20 years of service.…”

Section: Methodsmentioning

confidence: 99%

Localised Corrosion Damage Based Fatigue Crack Extension Model of Aluminium Alloy with Prior Corrosion Damage

Liang

Zhao

Shang

et al. 2015

AMM

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A modified model was presented for describing corrosion fatigue crack growth rate of aluminum alloy accurately. Considering the local damage around the crack tip is more reasonable for accelerating crack growth rate under corrosive environment, a damaged influence factors which characterize the damage degree of local damage near the crack tip has been introduced to revise the corrosion fatigue crack growth rate, and the experimental results are in good agreement with predictions of amendment fatigue crack growth rate model. The proposed model based on damaged influence factors is reasonable, and proposed a theoretical reference for aluminum alloy damage tolerance analysis.

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Section: Methodsmentioning

confidence: 99%

Localised Corrosion Damage Based Fatigue Crack Extension Model of Aluminium Alloy with Prior Corrosion Damage

Liang

Zhao

Shang

et al. 2015

AMM

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“…Crack growth rate d / d a N can be figured out by differential operation of crack length versus cyclic numbers recorded during fatigue tests. The corresponding intension factor K ∆ can be figured out according to the formula stress intension factor handbook [5] . Logarithm form of Eq.…”

Section: Experiments Setupmentioning

confidence: 99%

A Novel Modified Paris’ Law Based Evaluation of Fatigue Crack Propagation of LD2 under Combination of Corrosion and Cyclic Loadings

Wang

2015

AMR

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The present thesis made a research to evaluate fatigue crack growth rate subjecting to corrosion and cyclic fatigue loading, with the effect of load frequency on fatigue taken into account. A modified Paris’ law based model is proposed. An exponential modified expression of proportional parameter account for fatigue frequency is proposed based on the obvious fact that low frequency loading will lead to long fatigue life, thus prolong interaction time between corrosion media and specimen which will favor for crack propagation. Loading frequency higher enough will shorten that time, thus influence of corrosion will be significantly weaken, close to pure mechanical fatigue. Crack growth rate prediction from proposed formula is proved to be in good agreement with experimental results for steadily extended corrosion fatigue crack.

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“…1. All specimens were subjected to accelerated corrosion testing using ZJF-45 period immerse box, and the immersion time was 5 minutes and the roast time was 12 minutes, which accelerated 348 cycles equal to corrode one year outfield [3,4]. The pH of solution was maintained from 3.8 to 4.2, and the specimens were subjected to accelerated corrosion damage equivalent to 20 years of service.…”

Section: Environmentmentioning

confidence: 99%

Fracture Analysis of 6A02 Aluminum Alloy Subjected to Corrosion Fatigue Damage

Kong

2014

AMR

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With the aid of scanning electron microscope and energy spectrum analysis, the present thesis made a research on the fatigue fracture surface of AA 6A02 with corrosion damage as well as the effect of alloy element Si, Mg and the corrosion damage on the fracture process. Results indicate that the fatigue fracture surface is tough fracture with multiple fatigue sources. Pits introduced by corrosion damage will weaken the material property, which serve as crack nucleation sites. Proper hardening constituent element introduced during alloying process such as Si, Mg, who are in proper ratio of component to form strengthening phase Mg2Si without the excess phase of single crystal Si, will make strength and plasticity match, thus improve fatigue performance of materials.

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SEM<i> In Situ</i> Study on Pre-Corrosion and Fatigue Cracking Behavior of LY12CZ Aluminum Alloy

Cited by 6 publications

References 6 publications

Localised Corrosion Damage Based Fatigue Crack Extension Model of Aluminium Alloy with Prior Corrosion Damage

Localised Corrosion Damage Based Fatigue Crack Extension Model of Aluminium Alloy with Prior Corrosion Damage

A Novel Modified Paris’ Law Based Evaluation of Fatigue Crack Propagation of LD2 under Combination of Corrosion and Cyclic Loadings

Fracture Analysis of 6A02 Aluminum Alloy Subjected to Corrosion Fatigue Damage

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