THE EFFECT OF ALLOY ELEMENTS ON FATIGUE STRENGTH OF GRAY CAST IRON AT ROOM AND HIGH TEMPERATURE
ABSTRACT: Gray cast
iron is quite
poor in terms
of fatigue resistance
due to its
typical microstructure of distributed graphite lamellas in a
pearlite matrix. The objective of this research to improve mechanical properties
and fatigue strength gray cast iron (GCI) at high temperature by adding the
alloy elements such as: nickel
(Ni), molybdenum (Mo),
copper (Cu) and
chromium (Cr). The
mechanical characterization
that has been
done is tensile
test and hardness
tesst. The tensile
test was conducted based on
ASTM E8 standard.
The hardess test
of GCI was
test by Brinell
Hardness Test methods based on ASTM E10. Fatigue test was
performed on continuous radius fatigue specimens based on JIS Z 2774
standard with cyclic
loading frequency of
50 Hz and
load ratio R
= -1. The
fatigue test has been done
at room temperature and at temperature 300oC. The results of
this experiments show that alloy elements such as : nickel (Ni),
molybdenum (Mo), copper (Cu) and chromium (Cr) increase the hardness and tensile
strength of Gray cast iron. Nickel results finer graphite grain and improve
fatigue strength of Gray cast iron at high temperature.
Author: Sulardjaka, S.T.
Atmadja, S. Nugroho, F. Adnan, A.D. Cahyono
Journal Code: jptmesingg130004
