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|Title:||Effect of artificial ageing on the hardness of cast ZA-27/graphite particulate composites|
|Authors:||Seah, K.H.W. |
|Citation:||Seah, K.H.W.,Sharma, S.C.,Girish, B.M. (1995). Effect of artificial ageing on the hardness of cast ZA-27/graphite particulate composites. Materials and Design 16 (6) : 337-341. ScholarBank@NUS Repository.|
|Abstract:||The aim of this present investigation is to study the effect of artificial ageing on the hardness of cast ZA-27 zinc-aluminium alloy/graphite particulate composites containing graphite particles of size 90-150 μm and of contents ranging from 0% to 5% by weight. The age-hardening characteristics of the unreinforced ZA-27 alloy as well as of the graphite-reinforced composite materials were determined using hardness measurements. The ageing temperatures were 75°C, 100°C and 125°C for ageing durations of 6, 12 and 18 hours respectively. The results show that for any particular graphite content and ageing temperature, hardness seems to increase monotonically with ageing time, although it probably tends towards an asymptotic value. For the non-aged composites, graphite content plays a significant role in determining their hardness values, whereas for all the aged composites, the effect of graphite content on hardness is not so marked. © 1996.|
|Source Title:||Materials and Design|
|Appears in Collections:||Staff Publications|
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