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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.19 [2012] >
IJEMS Vol.19(2) [April 2012] >
| Title: | An investigation on the workability of sintered copper-silicon carbide preforms during cold axial upsetting |
| Authors: | Sumathi, M
Selvakumar, N |
| Keywords: | Metal matrix composite
Copper
Silicon carbide
Upsetting
Workability
Formability stress index |
| Issue Date: | Apr-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | An
investigation has been carried out for the determination of the workability
behaviour of Cu-SiC composites under two different stress conditions namely
plane and tri-axial state. Cylindrical preforms with 95% initial preform
density possessing aspect ratio of 0.60 are prepared from copper with various
percent content of silicon carbide (up to 20%) metal matrix composites using a
die and punch assembly with a 1.0 MN capacity Universal Testing Machine. The
sintering operation is carried out in an electric furnace at 850 ± 10°C for a
period of one hour in argon inert atmosphere and subsequently they are furnace
cooled. Each sintered preform is subjected to an incremental compressive
loading under zinc stearate as lubricant. Based on the experimental results,
the phenomenon like axial strain (εz), various stress ratio
parameters (namely (σm/σeff) and (σθ/σeff))
and the formability stress index (β) under two different stress state
conditions are systematically analysed considering the barreling effects. |
| Page(s): | 121-128 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.19(2) [April 2012]
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