PSI - Issue 14

Sukamal Adhikary et al. / Procedia Structural Integrity 14 (2019) 127–133 Author name / Structural Integrity Procedia 00 (2018) 000 – 000

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pellets are prepared for each experiment. Five readings for length are taken for each pellet. Thus, mean of fifteen readings are recorded as the length for each experiment. Since magnesium is known to react violently with water, the conventional method of d ensity measurement by Archimedes principle couldn’t be adopted. The density is calculated by dividing the mass of each pellet by the volume of the pellet. The objective of this study is to analyse the effect of applied load and charge mass on the density of the pellets formed by compacting. 3. Results and discussions The experiments were performed by first varying the applied load from 1 ton to 9 tons and then varying the charge mass of powder mixture from 40gm to 160 gm. The dependence of density on the variation of applied load and chare mass were studied.

2.1 Variation of density with applied load

The applied load is varied from 1 ton to 9 tons. The other two process variables namely charge mass for each pellet and dwell time of applied load are maintained constant at 100 gm and 15 seconds respectively. The variation of density with change in applied load is depicted in Fig. 3.

Fig. 3 Density variation with applied load

2.1 Variation of density with charge mass of powder mixture

In the second set of experiments, the charge mass is varied from 40 gm to 160 gm keeping the applied load constant at 6 tons for a fixed duration of 15 sec. The alteration of density with variation in charge mass is as shown in Fig. 4.

Fig. 4 Density variation with charge mass