X. Tan et al., FRICTION STUDIES AT DIFFERENT NORMAL PRESSURES WITH ALTERNATIVE RING-COMPRESSION TESTS, Journal of materials processing technology, 80-1, 1998, pp. 292-297
Citations number
19
Categorie Soggetti
Material Science","Engineering, Manufacturing","Engineering, Industrial
In the present paper, experimental investigations and theoretical anal
yses of friction are carried out with alternative ring-compression tes
ts applying three different ring geometries, namely a concave-, rectan
gular- and convex-shaped ring cross-section, resulting in three differ
ent normal pressures, at low, medium and high level. Aluminum alloy AA
6082 was used in the experiments, in both annealed and work-hardened c
onditions. Two different lubricants were applied in the experiments, i
.e. soap and molybdenum disulphide, both in connection with an alumina
te conversion coating. In order to directly study the influence of fri
ction whilst avoiding any coinciding influence of the strain hardening
, a friction model with a constant absolute value was applied in finit
e-element method (FEM) simulations for calibration of the friction. Ca
libration curves with the friction constant A as a parameter were obta
ined using FEM analysis and verified by the experimental results. The
influence of strain hardening and pressure level on friction and metal
flow are discussed. (C) 1998 Elsevier Science S.A. All rights reserve
d.