scholarly journals Optimization by Using Taguchi Method of the Production of Magnesium-Matrix Carbide Reinforced Composites by Powder Metallurgy Method

Metals ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 352 ◽  
Author(s):  
Özkan Küçük ◽  
Tayeb Elfarah ◽  
Serkan Islak ◽  
Cihan Özorak
Keyword(s):  
Powder Metallurgy ◽  
Taguchi Method ◽  
Powder Metallurgy Method ◽  
Reinforced Composites ◽  
Magnesium Matrix

Taguchi Method Approach to Optimize Manufacturing Process Parameters of Aluminum-5 % Fly Ash Alloy Using Powder Metallurgy

2012 ◽  
Vol 576 ◽  
pp. 284-288
Author(s):  
Fatahul Arifin ◽  
Iskandar ◽  
Azharuddin Azharuddin
Keyword(s):  
Fly Ash ◽  
Powder Metallurgy ◽  
Taguchi Method ◽  
Aluminum Powder ◽  
Weight Fraction ◽  
Holding Time ◽  
Size Factor ◽  
Powder Metallurgy Method ◽  
Irregular Form ◽  
Compacting Pressure

Fly ash is waste of coal combustion which can be used in Aluminum alloy. In this research Aluminum is mixed with fly ash that used powder metallurgy method. Aluminum powder is produced by Merck German which is in irregular form and has homogeneous particles, while fly ash is got from residual combustion coal in forging section of Politeknik Negeri Sriwijaya (Polsri) mechanical workshop which is processed until grains size 140 and 270 mesh. Aluminum Powder had mixed with weight fraction 5 % of fly ash for an hour then is pressed with holding time 60 and 120 seconds, compacting pressure are 139 N/mm2 and 275 N/mm2 using cold iso-static pressing. After that green body is resulted then is being sintered until 5500C. Taguchi Method orthogonal L4 is used to find out factors which influence optimum condition of Brinell’s hardness Aluminum/5% fly ash. The result of analysis using ANOVA is grains size factor, holding time, and compacting pressure has affected significantly to hardness of Aluminum/5% fly ash.

Role of Aluminium on the Microstructure and Corrosion Behaviour of Magnesium Prepared by Powder Metallurgy Method

2020 ◽  
Vol 17 (3) ◽  
pp. 8206-8213
Author(s):  
J. Alias
Keyword(s):  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
Corrosion Behaviour ◽  
Corrosion Current ◽  
Optical Microscope ◽  
High Reactivity ◽  
Aluminium Content ◽  
Powder Metallurgy Method ◽  
X Ray Diffraction ◽  
Promising Development

Much research on magnesium (Mg) emphasises creating good corrosion resistance of magnesium, due to its high reactivity in most environments. In this study, powder metallurgy (PM) technique is used to produce Mg samples with a variation of aluminium (Al) composition. The effect of aluminium composition on the microstructure development, including the phase analysis was characterised by optical microscope (OM), scanning electron microscopy (SEM) and x-ray diffraction (XRD). The mechanical property of Mg sample was performed through Vickers microhardness. The results showed that the addition of aluminium in the synthesised Mg sample formed distribution of Al-rich phases of Mg17Al12, with 50 wt.% of aluminium content in the Mg sample exhibited larger fraction and distribution of Al-rich phases as compared to the 20 wt.% and 10 wt.% of aluminium content. The microhardness values were also increased at 20 wt.% and 50 wt.% of aluminium content, comparable to the standard microhardness value of the annealed Mg. A similar trend in corrosion resistance of the Mg immersed in 3.5 wt.% NaCl solution was observed. The corrosion behaviour was evaluated based on potentiodynamic polarisation behaviour. The corrosion current density, icorr, is observed to decrease with the increase of Al composition in the Mg sample, corresponding to the increase in corrosion resistance due to the formation of aluminium oxide layer on the Al-rich surface that acted as the corrosion barrier. Overall, the inclusion of aluminium in this study demonstrates the promising development of high corrosion resistant Mg alloys.

Synthesis and Characterisation of Anodized Powder Metallurgy Mg-Ca Alloy

2018 ◽  
Vol 280 ◽  
pp. 221-225
Author(s):  
C.D. Zuraidawani ◽  
F.W. Norhadira ◽  
Mochd Nazree B. Derman
Keyword(s):  
Powder Metallurgy ◽  
Oxide Film ◽  
Vickers Hardness ◽  
Film Formation ◽  
Surface Hardness ◽  
Powder Metallurgy Method ◽  
Xrd Pattern ◽  
Surface Changes

The Mg-1wt.%Ca alloy was fabricated using powder metallurgy method. The anodizing process were done by using different voltage (5V, 15V, 25V) and concentration of KOH (0.1M, 0.5M, 1.0M). The surface changes on PM Mg/1wt.%Ca resulted by anodizing was analyzed using SEM-EDX and XRD pattern. Meanwhile, surface hardness was measured by micro-Vickers hardness machine. The experiment found different XRD pattern between all non-anodized and anodized samples. The study found that increasing the voltage will increase the hardness while increasing KOH concentration reduced the hardness. The relation of the hardness and oxide film formation can be analyzed using SEM-EDX and XRD pattern. The optimum value for voltage, KOH concentration and hardness are 25V, 0.1M and 27.2 HV. The XRD detect the changes in PM Mg/1wt.% Ca indicates the oxide film formation.

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