Effect of grain size on the fatigue crack growth behavior of 2524-T3 aluminum alloy

• Autorzy: Shou W. B. , Yi D. Q. , Liu H. Q. , Tang C. , Shen F. H. , Wang B.

Identyfikatory

DOI

10.1016/j.acme.2016.01.004

• Języki publikacji: EN

Abstrakty

EN

2524-T3 aluminum alloy sheets with different grain sizes (13 μm, 59 μm, 178 μm, 355 μm, 126 μm, and 87 μm) were prepared using methods such as rolling and annealing. The microstructures and mechanical properties of the 2524-T3 aluminum alloy sheets were studied using optical microscopy (OM), scanning electron microscopy (SEM), and tensile and fatigue crack growth (FCG) rate tests. The grain size had a significant effect on the fatigue crack growth (FCG) rate. Alloys with grain sizes between 50 and 100 μm exhibited high fatigue crack propagation resistances and the lowest FCG rates (da/dN = 1.05–1.45 × 10−3 mm/cycle at ΔK = 30 MPa m1/2). Microstructural observations revealed that fatigue cracks propagated more tortuously in the alloy with grain sizes within the range of 50–100 μm. This result is attributed to the combined effects of grain boundaries, crack deflection, fracture surface roughness-induced crack closure, and plasticity-induced crack closure.

Słowa kluczowe

EN

aluminum alloys; fatigue crack growth; crack closure; crack deflection; grain size

PL

stopy aluminium; pęknięcie zmęczeniowe; wytrzymałość materiałów

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2016
• Tom: Vol. 16, no. 3
• Strony: 304--312
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wykr.

Twórcy

autor

Shou W. B.

• School of Materials Science and Engineering, Central South University, Changsha 410083, China

autor

Yi D. Q.

• School of Materials Science and Engineering, Central South University, Changsha 410083, China
• Light Alloy Research Institute, Central South University, Changsha 410083, China

autor

Liu H. Q.

• School of Materials Science and Engineering, Central South University, Changsha 410083, China

autor

Tang C.

• School of Materials Science and Engineering, Central South University, Changsha 410083, China

autor

Shen F. H.

• School of Materials Science and Engineering, Central South University, Changsha 410083, China

autor

Wang B.

• School of Materials Science and Engineering, Central South University, Changsha 410083, China
• Light Alloy Research Institute, Central South University, Changsha 410083, China

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę