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Actual Problems in Machine Building. 2016. N 3
Materials Science
in Machine Building
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MECHANICAL PROPERTIES AND FRACTURE MECHANISM OF THE EXTRUDED
LOW-CARBON STEEL AT LOW TEMPERATURES
Kovalenko N.D.
, Junior Researcher, e-mail:
nakalykay@mail.ruIvanov A.M.
, Ph.D. (Engineering), e-mail:
a.m.ivanov@iptpn.ysn.ruLarionov Institute of the Physical-Technical Problems of the North of the Siberian Branch of the
RAS, 1 Oktyabrskaya str., Yakutsk, 677891, Russian Federation
Abstract
The extrusion is made of low carbon structural steel. Conducted mechanical tensile test of
samples and determined the mechanical properties of Fe360 steel in the initial state and after
extrusion. A study of failure mechanism of steel in the initial and hardened state at positive and low
temperatures. It is shown that the strength of steel Fe360 after extrusion is increased in 1,5...2 times,
while the plasticity decreases in 2,5 times. As a result of the structure refinement in extrusion 673 K
does not change the viscous mechanism of destruction in uniaxial sample tension, including at 213
K is established.
Keywords
steel, exstrusion, sample, temperature, mechanical properties, strength, plasticity, break,
fractograph, fracture mechanism, viscous fracture
Funding
The work is done within the research project № III.28.1.1 program III.28.1 RAS.