Tensile behaviour and fracture characteristics of die cast magnesium alloy AM50

2008 ◽  
Vol 201 (1-3) ◽  
pp. 364-368 ◽  
Author(s):  
Henry Hu ◽  
Ming Zhou ◽  
Zhizhong Sun ◽  
Naiyi Li
Keyword(s):  
Magnesium Alloy ◽  
Tensile Behaviour ◽  
Fracture Characteristics ◽  
Die Cast ◽  
Cast Magnesium Alloy ◽  
Alloy Am50 ◽  
Cast Magnesium

A Kinetic Model for Dissolution of Second Phases in Die-Cast Mg Alloy AM50

2010 ◽  
Vol 297-301 ◽  
pp. 111-116 ◽  
Author(s):  
Li Hong Han ◽  
Henry Hu ◽  
Derek O. Northwood ◽  
X. Nie
Keyword(s):  
Magnesium Alloy ◽  
Kinetic Model ◽  
Engineering Properties ◽  
Heating Process ◽  
Secondary Phases ◽  
Die Cast ◽  
Cast Magnesium Alloy ◽  
Alloy Am50 ◽  
Cast Magnesium ◽  
Kinetics Of

Dissolution of secondary phases during thermal treatment in cast magnesium alloys influences their engineering properties. In this study, a kinetic model based on a Kissinger-type method has been developed for describing dissolution of secondary phases in the high pressure die cast magnesium alloy AM50 during a thermally activated heating process. Also, differential scanning calorimetry (DSC) was effectively used for investigating the dissolution kinetics of secondary phases in the AM50 alloy. By fitting a kinetic model to the DSC results, the activation energy of the dissolution of the secondary phases can be determined. In parallel, the microstructure of the alloy was analyzed by scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS). It was found that the distribution of secondary phases and the concentration of alloying elements both at the grain boundaries and in the grains play an important role in the solid-state transformation kinetics of die cast magnesium alloy AM50.

Microstructure and second-phase particles in low- and high-pressure die-cast magnesium alloy AM50

2005 ◽  
Vol 36 (8) ◽  
pp. 1989-1997 ◽  
Author(s):  
Val Y. Gertsman ◽  
Jian Li ◽  
Su Xu ◽  
James P. Thomson ◽  
Mahi Sahoo
Keyword(s):  
High Pressure ◽  
Magnesium Alloy ◽  
Second Phase ◽  
Die Cast ◽  
Second Phase Particles ◽  
Cast Magnesium Alloy ◽  
Alloy Am50 ◽  
Cast Magnesium

Effect of Section Thicknesses on Tensile Behavior and Microstructure of High Pressure Die Cast Magnesium Alloy AM50

2005 ◽  
Vol 475-479 ◽  
pp. 463-468 ◽  
Author(s):  
Ming Zhou ◽  
Nai Yi Li ◽  
Henry Hu
Keyword(s):  
High Pressure ◽  
Magnesium Alloy ◽  
Casting Process ◽  
Tensile Behavior ◽  
Die Cast ◽  
Cast Magnesium Alloy ◽  
Die Casting Process ◽  
Alloy Am50 ◽  
Cast Magnesium ◽  
Pressure Die Casting

High pressure die cast magnesium alloy AM50 is currently used extensively in complex shaped automotive components with various cross-section thicknesses. Understanding of the effect of section thicknesses on mechanical behavior of AM50 is critical for proper design of different 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. The prepared coupons were tensile tested at room temperature. Microstructure analysis and porosity measurement were performed on the representative specimens. The results of tensile testing show that the tensile properties including yield strength (YS), ultimate tensile strength (UTS) and elongation(Ef) decreases with an increase in section thicknesses of die cast AM50. Microstructure and porosity analyses indicate that the observed tensile behavior of die cast AM50 is primarily attributed to the level of porosity which resulted from entrapped gases during the high pressure die casting process.

An Investigation of the Effects of Cast Skin on the Mechanical Properties of an AM60 Die-Cast Magnesium Alloy

2015 ◽  
Vol 8 (3) ◽  
pp. 714-721 ◽  
Author(s):  
Joy Hines Forsmark ◽  
Zachary Dowling ◽  
Kelsey Gibson ◽  
Caroline Mueller ◽  
Larry Godlewski ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Die Cast ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

Investigations on Fatigue Properties of Die Cast Magnesium Alloy AZ91HP at Very High Cycles

2007 ◽  
Vol 353-358 ◽  
pp. 235-238
Author(s):  
Tang Li ◽  
Qing Yuan Wang ◽  
Q.F. Dou ◽  
Chong Wang ◽  
M.R. Sriraman
Keyword(s):  
Magnesium Alloy ◽  
Fatigue Cracks ◽  
Ambient Air ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Loading Frequency ◽  
Die Cast ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium ◽  
Very High

Very high cycle fatigue (VHCF) properties of high-pressure die cast Magnesium alloy AZ91HP have been investigated. Ultrasonic fatigue tests up to 109 cycles were conducted at the loading frequency of 20 kHz, under R=-1 condition and in ambient air. The experimental results show that specimens fail even after 107 cycles although the scatter seems to be large probably due to the presence of materials defects. However, there seems to be a fatigue limit at about 109 cycles. The fractures contain typical brittle features, with the fatigue cracks seen to initiate from the porosity in the material, either from the surface or beneath.

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