Tensile and fatigue behaviour of wrought magnesium alloys AZ31 and AZ61

Chamos, Apostolos; Pantelakis, Spiros; Haidemenopoulos, Gregory N.; Kamoutsi, H.

doi:10.1111/j.1460-2695.2008.01267.x

Cited by 60 publications

(37 citation statements)

References 20 publications

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“…Recent work has shown the important influence of texture on fatigue life in magnesium alloys (Bernard et al 2010, Sajuri et al 2006Chamos et al 2008). Similar conclusions were drawn for other HCP metals like titanium alloys (Bache et al 1998;Whittaker et al 2009).…”

Section: Magnesium Alloyssupporting

confidence: 65%

Analysis of Lightweight Materials for the AM2 System

Allison¹,

Rushing²,

Garcia³

2014

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An analysis was performed on potential materials that could replace the 6061-T6 aluminum alloy currently used in the AM2 airfield matting for the purpose of light-weighting the design. An in-depth analysis was performed on metal and polymer matrix composites. However, neither groups of materials produced a suitable material based on operating conditions of the AM2. Newly developed extruded magnesium alloys were identified that could potentially provide weight savings of 30 to 40% while maintaining the current performance of the AM2. In addition, traditional high-strength aluminum alloys were identified that could provide substantial weight savings. However, manufacturing issues existed due to the high strength of these aluminum alloys. Finally, analysis was performed to determine the cost of manufacturing the AM2 using these alternate materials.

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Section: Magnesium Alloyssupporting

confidence: 65%

Analysis of Lightweight Materials for the AM2 System

Allison¹,

Rushing²,

Garcia³

2014

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“…The damage parameter for Swellam's model was found from equation (6). The graphs in Figure 16(a) illustrate the results for the five specimen sets investigated.…”

Section: Resultsmentioning

confidence: 99%

“…To account for geometrical factors and load ratio, , the general stress intensity parameter, , was defined as (6) and considered as a damage parameter. The SIFs and the damage parameter were assumed constant, i.e., independent of the crack length during the course of cyclic loading.…”

Section: Fracture Mechanics Approach -Swellam's Modelmentioning

confidence: 99%

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Fatigue characterization and modeling of AZ31B magnesium alloy spot-welds

Behravesh

Jahed

Lambert

2014

International Journal of Fatigue

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Cyclic behavior of AZ31B spot-welds was studied using different specimen configurations, and compared with steel and aluminum spot-welds. Fatigue strength of magnesium spot-welds was similar to aluminum and less than steel. Three failure modes were observed in tensile-shear specimens and one mode of failure in cross-tension specimens. Fatigue crack initiation life was 50% and 30% of the total life for tensile-shear and cross-tension specimens, respectively. A number of available fatigue models were assessed by predicting fatigue life of magnesium spot-welds. Although these models do not account for the asymmetric cyclic hardening behavior, some of them performed successfully for magnesium spotwelds.

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“…The flow stress of AZ61 was higher than that of AZ31 at all strain rates. This is believed to be due to the large amount of aluminium content in the alloy [9]. High aluminium content in AZ61 significantly decreased the grain size and presence of precipitation where it tends to cause more dislocation piled up due to blocking at large grain boundaries [10][11][12] and precipitation [13].…”

Section: Resultsmentioning

confidence: 99%

Effect of tensile strain rates on flow stress for extruded AZ31 and AZ61 magnesium alloys

Latif

Sajuri²,

Syarif

2017

Int. J. Automot. Mech. Eng.

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Aluminium-Zinc (AZ) is a popular series of magnesium alloy and is used in automobile components and structures. In this regard, the AZ series is subject to high velocity and impact loads during accidents. Thus, it is essential that the effect of tensile strain rates i.e., low and intermediate strain rates, on flow stress of extruded AZ31 and AZ61 magnesium alloys is investigated. In this study, tensile test under low strain rates were fixed at 1×10 -4 , 1×10 -3 , 1×10 -2 and 1×10 -1 s -1 , while tensile tests under intermediate strain rates were fixed at 100, 200, 400 and 600 s -1 . The tensile test specimens were prepared with a gage length and diameter of 10 mm and 3 mm, respectively. Flow stress was determined by averaging the values of yield stress and tensile strength of the alloy. The results showed that the flow stresses of both extruded magnesium alloys were strain rate dependent. This is believed to be due to the increasing dislocation density in the materials. Thus, the resistance to deformation increased with an increasing volume of dislocation density for extruded AZ31 and AZ61 alloys. Moreover, the flow stresses of both alloys were strain rate dependent; the activation of critical resolved shear stress (CRSS) of non-basal slip systems for magnesium alloys significantly influenced the deformation mechanism of the materials. Additionally, flow stresses of both magnesium alloys increased at increasing strain rate due to the large numbers of twinning in alloys. Hence, tensile strain rates significantly affect the flow stress and failure mechanism of magnesium alloys.

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Tensile and fatigue behaviour of wrought magnesium alloys AZ31 and AZ61

Cited by 60 publications

References 20 publications

Analysis of Lightweight Materials for the AM2 System

Analysis of Lightweight Materials for the AM2 System

Fatigue characterization and modeling of AZ31B magnesium alloy spot-welds

Effect of tensile strain rates on flow stress for extruded AZ31 and AZ61 magnesium alloys

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