Fatigue Crack Growth of Thin Wall Magnesium AZ91 Alloy Cast

Tomasz Brynk; Barbara Romelczyk-Baishya; Anna Jastrzębska; Katarzyna Nowak; Zbigniew Pakiela

doi:10.4028/www.scientific.net/KEM.592-593.749

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 592-593Fatigue Crack Growth of Thin Wall Magnesium AZ91...

Fatigue Crack Growth of Thin Wall Magnesium AZ91 Alloy Cast

Abstract:

The paper presents the results of fatigue crack growth rate tests performed in magnesium AZ91 alloy cast of different wall thicknesses. Due to the limited size of investigated cast the tests were carried on mini-samples of 4x4x1 mm gauge section dimensions. The samples were cut from the 5, 10 and 30 mm thick walls. The optical displacement measurement technique, namely Digital Image Correlation, and inverse method were applied for determination of the stress intensity factors and the crack tip coordinates during tests. There were also performed uniaxial tensile tests in mini-samples for the determination of the mechanical properties changes related to different cast thicknesses. The relation between the microstructure and the results of mechanical tests was discussed.

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Periodical:

Key Engineering Materials (Volumes 592-593)

Pages:

749-752

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.592-593.749

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Online since:

November 2013

Authors:

Tomasz Brynk, Barbara Romelczyk-Baishya, Anna Jastrzębska, Katarzyna Nowak, Zbigniew Pakiela

Keywords:

Digital Image Correlation (DIC), Fatigue Crack Growth (FCG), Magnesium AZ 91, Mini-Samples

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