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This paper aimed at present study used to investigate: the
effect of various specimen treatment process and cyclic loading
on the mechanical properties of steel cylinder. In this study,
the experimental parameters include: various cutting methods for
preparation of specimen, current used of plasma arc cutting,
flatted processes of specimen, weld-removed level and cyclic
loading. The experimental results show that mechanical
properties obtained from plasma arc cutting process is similar
to use the machining cutting. but, the oxyacetylene cutting will
obtain higher mechanical strengths and smaller elongation than
the uses machining cutting. The yield strength of specimen
decreases with the increase of the current of the plasma
cutting. The mechanical strengths of specimen increases while
the harmed flatting or the repeated bending were used. The
welded-removed level is not significant influence on the
mechanical properties. The mechanical strengths of the sample A
decreases with the increase of the cyclic loading. Then, the
behavior of cyclic is belong to the cyclic softening. The
mechanical strength of sample B increases with the increase of
the cyclic loading. And the behavior of cyclic is belong to the
cyclic hardening.
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