Experimental and numerical analyses of magnesium alloy hot workability

Abbassi, Fethi; Srinivasan, Mukundhan; Loganathan, C.; Narayanasamy, R.; Gupta, Manoj

doi:10.1016/j.jma.2016.10.004

Cited by 43 publications

(12 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although warm or hot forming of the AZ31 alloy is more favourable than cold forming as shown by e.g. Abbassi et al, 4 the dissipated plastic strain‐energy density during the first variable load cycle of AZ31 increases with higher temperature as can be seen from the results in Figure 8D. The ratio of the dissipated energy density during the nested cycles is not so distinguishable due to the scatter of experimental results.…”

Section: Resultsmentioning

confidence: 78%

Determination of Stress–Strain Behaviour of Magnesium Alloy AZ31 under Variable Thermomechanical Loading

Šeruga

Bešter

Nagode

et al. 2021

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Growing environmental demands and higher fuel efficiency encourage the use of new light‐weight load‐bearing materials even for operation under rougher environmental conditions. Consequently, as the materials used in the vital load‐bearing components of the chassis, brake system or exhaust system are subjected to thermomechanical fatigue during the operation due to variable mechanical and thermal loads, it is crucial for design engineers and CAE analysts to understand the cyclic behaviour of new materials under such conditions. Here we have analysed the stress–strain behaviour of magnesium alloy AZ31 and the influence of variable thermomechanical loads. A uniaxially loaded flat specimen has been first mechanically loaded at −25°C. The temperature was then increased to 150°C whilst the variable mechanical loading remained unchanged. The tests have been strain‐controlled using a video extensometer. The stress–strain behaviour of the magnesium alloy AZ31 has been then investigated considering both variable temperature and variable mechanical load.

show abstract

Section: Resultsmentioning

confidence: 78%

Determination of Stress–Strain Behaviour of Magnesium Alloy AZ31 under Variable Thermomechanical Loading

Šeruga

Bešter

Nagode

et al. 2021

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…2) where ε f is equivalent plastic strain, p is the average value of the three normal stresses and q is the Von Mises equivalent stress. Material constants, taken from the paper by Abbassi et al [19], are reported in Table 3. The sheet was modeled as a deformable object, using the shell type elements S4RT option (5 integration points through the thickness), with a thickness of 1.2 mm, while the tool was modeled as a rigid element with a hemispherical shape having a diameter of 12 mm.…”

Section: Numerical Modelmentioning

confidence: 99%

A numerical approach for the modelling of forming limits in hot incremental forming of AZ31 magnesium alloy

Campanella

Buffa

Valvo

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Magnesium alloys, because of their good specific material strength, can be considered attractive by different industry fields, as the aerospace and the automotive one. However, their use is limited by the poor formability at room temperature. In this research, a numerical approach is proposed in order to determine an analytical expression of material formability in hot incremental forming processes. The numerical model was developed using the commercial software ABAQUS/Explicit. The Johnson-Cook material model was used, and the model was validated through experimental measurements carried out using the ARAMIS system. Different geometries were considered with temperature varying in a range of 25–400 °C and wall angle in a range of 35–60°. An analytical expression of the fracture forming limit, as a function of temperature, was established and finally tested with a different geometry in order to assess the validity.

show abstract

“…The workpiece plastic behavior is defined by the Johnson-Cook (JC) model due to the presence of high temperature, strain, and strain rate conditions over the DSFSW process (equation ( 1)). 28 s…”

Section: Simulation Modelmentioning

confidence: 99%

Material flow modeling for the DSFSW of magnesium alloy

Asadi

Mirzaei

2020

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

The Coupled Eulerian Lagrangian (CEL) method is utilized to model the double shoulder friction stir welding (DSFSW) of AZ91 magnesium alloy and then the model is verified by the experiments. The effects of tool rotational speed and sheet thickness on temperature and strain distributions as well as the material flow patterns are considered at different steps of the process. The material flow pattern around the tool pin is demonstrated properly and the shoulder driven and pin driven zones are predicted very well. Results show that, the material movement in shoulder driven and pin driven zones is different, while it is from the advancing side (AS) to the retreating side (RS) in the pin driven zone, it is inverse in the shoulder driven zone. Additionally, increase in rotational speed raises the maximum temperature and strain, improves the material movement, expands the SZ width and increases the depth of shoulder driven zone. Furthermore, increase in sheet thickness results in a decrease in maximum temperature and strain as well as the material movement. In the sheets with low thickness due to the effects of two shoulders, the pin driven zone is not distinguishable, however in thicker welding sheets the pin driven zone is obvious by significantly lower strains.

show abstract

Experimental and numerical analyses of magnesium alloy hot workability

Cited by 43 publications

References 31 publications

Determination of Stress–Strain Behaviour of Magnesium Alloy AZ31 under Variable Thermomechanical Loading

Determination of Stress–Strain Behaviour of Magnesium Alloy AZ31 under Variable Thermomechanical Loading

A numerical approach for the modelling of forming limits in hot incremental forming of AZ31 magnesium alloy

Material flow modeling for the DSFSW of magnesium alloy

Contact Info

Product

Resources

About