Effects of cell size on quasi-static compressive properties of Mg alloy foams

2012 ◽  
Vol 34 ◽  
pp. 40-44 ◽  
Author(s):  
Z.G. Xu ◽  
J.W. Fu ◽  
T.J. Luo ◽  
Y.S. Yang
Keyword(s):  
Cell Size ◽  
Mg Alloy ◽  
Compressive Properties

Correlation between Zirconium Addition and Compressive Properties of AZ31 Mg Alloy Foams

2011 ◽  
Vol 121-126 ◽  
pp. 75-79
Author(s):  
Bo Young Hur ◽  
Rui Zhao
Keyword(s):  
Mechanical Properties ◽  
Energy Absorption ◽  
Mg Alloy ◽  
Compressive Properties ◽  
Absorption Properties ◽  
Compression Behavior ◽  
Foaming Agent ◽  
Az31 Mg Alloy ◽  
Absorption Characteristics ◽  
Zirconium Addition

The compressive behaviors of AZ31-Zr foams using Ca particles as thickening agent and CaCO3 powder as foaming agent were investigated in this study. The porosity was about 48.7%~72.9%, pore size was between 0.43~0.97 mm, and homogenous pore structures were obtained. Mechanical properties of AZ31 Mg alloy foams were investigated by means of UTM. The cellular AZ31 Mg foams possess superior comprehensive mechanical properties. The energy absorption characteristics and the effects of compression behavior on the energy absorption properties for the cellular AZ31 Mg foams have been investigated and discussed. The results show that with the addition of Zr, the Mg alloy foam has the highest energy absorption value of 16.26 MJ/m3 and the hardness value of 81.8 HV, which is much higher than that of the foams fabricated without Zr.

Effect of Cell Size on the Dynamic Compressive Properties of Open-Celled Aluminum Foams

2002 ◽  
Vol 43 (10) ◽  
pp. 2548-2553 ◽  
Author(s):  
Hidetaka Kanahashi ◽  
Toshiji Mukai ◽  
T. G. Nieh ◽  
Tatsuhiko Aizawa ◽  
Kenji Higashi
Keyword(s):  
Cell Size ◽  
Compressive Properties ◽  
Aluminum Foams

Effects of cell size on compressive properties of aluminum foam

2006 ◽  
Vol 16 (2) ◽  
pp. 351-356 ◽  
Author(s):  
Xiao-qing CAO ◽  
Zhi-hua WANG ◽  
Hong-wei MA ◽  
Long-mao ZHAO ◽  
Gui-tong YANG
Keyword(s):  
Cell Size ◽  
Aluminum Foam ◽  
Compressive Properties

Foaming Characteristics of Al-Mg Alloy Foam

2006 ◽  
Vol 510-511 ◽  
pp. 902-905 ◽  
Author(s):  
Sang Youl Kim ◽  
Yong Su Um ◽  
Bo Young Hur
Keyword(s):  
Cell Size ◽  
High Speed ◽  
Induction Furnace ◽  
Mg Alloy ◽  
Foaming Agent ◽  
Uniform Dispersion ◽  
Homogeneous Cell ◽  
Specific Temperature ◽  
High Frequency Induction Furnace ◽  
High Frequency Induction

Al-Mg alloy foam used in this study was prepared, and Al-Mg alloy was melted by using a high-frequency induction furnace. Thickening and foaming agent were added to the molten Al-Mg alloy at a specific temperature, which was stirred. For uniform distribution of thickening and foaming agent, the impeller was rotated with high-speed about 400-1000rpm. When left in a furnace for a specific period after uniform dispersion of the foaming agent, gas was generated from the foaming agent and the cell size and distribution inside. We determined the structure of Al-Mg alloy foam using CT(Computed Tomography). The structure of Al-Mg alloy foam has homogeneous cell size at the bottom, larger cell size in the middle, and oalescence cell in the top part. To prevent this phenomenon, the viscosity and surface tension of the melt of Al-Mg alloy were controlled.

Effect of Cell Size on the Dynamic Compressive Properties of Aluminum Alloy Foams

2007 ◽  
Vol 124-126 ◽  
pp. 1317-1320 ◽  
Author(s):  
Zhi Hua Wang ◽  
Hong Wei Ma ◽  
Long Mao Zhao ◽  
Gui Tong Yang
Keyword(s):  
Aluminum Alloy ◽  
Yield Strength ◽  
Strain Rate ◽  
Relative Density ◽  
Cell Size ◽  
Cell Morphology ◽  
Compressive Properties ◽  
Aluminum Foams ◽  
Open Cell ◽  
Mechanical Responses

The static and dynamic compressive behaviors of open-cell aluminum alloy foams with virtually the same relative density of 0.4 were investigated. The foams have different cell sizes (0.5mm, 1.5mm, 2.5mm) but similar cell morphology and microstructure. The yield strength of these foams was characterized as a function of strain rate and cell morphology. The experimental results indicated that the mechanical responses of foams are sensitive to strain rate, and dependent of the cell size. The present results are compared in details with recent findings obtained from the aluminum foams.

The Influence of Melt Elongational Properties on the Morphology of PES Cellular Materials

2002 ◽  
Vol 21 (6) ◽  
pp. 445-454 ◽  
Author(s):  
Frank Wöllecke ◽  
Volker Altstädt ◽  
Jan Sandler ◽  
Dietmar Rakutt
Keyword(s):  
Molecular Weight ◽  
Cell Size ◽  
Foam Cell ◽  
Batch Process ◽  
Processing Conditions ◽  
Compressive Properties ◽  
Polymer Molecular Weight ◽  
Average Cell Size ◽  
Cell Size Distribution ◽  
Average Cell

Rheotens melt elongational experiments were performed to evaluate polyethersulfone with regard to its foamability. The effect of polymer molecular weight was correlated with the resulting foam cell morphology achieved under identical processing conditions in a batch process. It appears, that the melt strength of the polyethersulfone governs the average cell size, cell size distribution, as well as cell wall rupture during expansion and the corresponding compressive properties of the foam. These effects were further verified by a variation of the blowing agent content for polyethersulfone with a given molecular weight.

A Study on Al-Mg Alloy Foams by Melt Foaming Method

2007 ◽  
Vol 124-126 ◽  
pp. 1841-1844
Author(s):  
Yeong Hwan Song ◽  
Soo Han Park ◽  
Sang Youl Kim ◽  
Chang Hwan Seo ◽  
Bo Young Hur
Keyword(s):  
Compression Test ◽  
Magnesium Content ◽  
Gradual Decrease ◽  
Mg Alloys ◽  
Mg Alloy ◽  
Compressive Properties ◽  
Pore Structures ◽  
Al Mg Alloys

Al-Mg alloy foams were synthesized via conventional melt foaming method. Ca and TiH2 were introduced into molten Al-Mg alloys with different magnesium contents. The macrostructures of resultant alloy foams were analyzed and correlated with compressive properties estimated by compression test. It is shown that the pore structures observed in alloy foams degraded with increasing Mg contents. This tendency was shown to be consistent with compressive characteristics of corresponding alloy foams. In detail, plateau strength was high for Al-1wt%Mg alloy foams, exhibiting a gradual decrease in plateau strength with increasing magnesium content.

Effect of homogenizing heat treatment on the compressive properties of closed-cell Mg alloy foams

2013 ◽  
Vol 49 ◽  
pp. 19-24 ◽  
Author(s):  
Xingchuan Xia ◽  
Weimin Zhao ◽  
Xiangzheng Feng ◽  
Hui Feng ◽  
Xin Zhang
Keyword(s):  
Heat Treatment ◽  
Mg Alloy ◽  
Compressive Properties ◽  
Closed Cell
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