Effects of Section Size and Microstructural Features on the Mechanical Properties of Die Cast AZ91D and AM60B Magnesium Alloy Test Bars

Rodrigo, Don; Murray, M. J.; Mao, H.; Brevick, Jerald; Mobley, Carroll; Chandrasekar, V.; Esdaile, R.

doi:10.4271/1999-01-0927

Cited by 11 publications

(1 citation statement)

References 6 publications

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“…Moreover, the elongation values, 11.1%, 6.2%, and 2.3% for 2, 6, 10 mm, respectively, indicate evidently that a significant decrease in elongation occurs when the section thickness of specimens increases. The results of the current study are consistent with the relationship between tensile properties and section thicknesses for different types of die casting magnesium alloys reported in the literature [5,6]. Figures 1 and 2 reveal the porosity distribution and microstructure of the die cast AM50 alloys with 2, 6, and 10 mm section thicknesses, respectively.…”

Section: Tensile Behaviorsupporting

confidence: 90%

Strain-Hardening and Fracture Behavior of Die Cast Magnesium Alloy AM50

Sun

Zhou

et al. 2007

Research Letters in Materials Science

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Understanding tensile and fracture behaviors of die cast magnesium alloys is of importance for proper design of various emerging automotive applications. In the present study, magnesium alloy AM50 was high pressure die cast into rectangular coupons with section thicknesses of 2, 6, and 10 mm. Effect of section thicknesses on strain-hardening and fracture behaviors of the die cast AM50 was investigated. The results of tensile testing indicate that the tensile properties including yield strength (YS), ultimate tensile strength (UTS), and elongation(Ef)decrease with increasing section thicknesses of die cast AM50. The analysis of true stress versus strain curves shows that the straining hardening rates during the plastic deformation of the alloy increase with decreasing section thicknesses. The observation via SEM fractography illustrates that the fracture behavior of die cast AM50 is influenced by section thicknesses. As the section thickness increases, the fracture of AM50 tends to transit from ductile to brittle mode due to increasing porosity content and coarsening microstructure.

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Section: Tensile Behaviorsupporting

confidence: 90%