Numéro |
J. Phys. IV France
Volume 112, October 2003
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Page(s) | 337 - 340 | |
DOI | https://doi.org/10.1051/jp4:2003896 |
J. Phys. IV France 112 (2003) 337
DOI: 10.1051/jp4:2003896
Martensite transformation in steels under impact load
S.A. AtroshenkoInstitute for Problems of Mechanical Engineering, Russian Academy of Sciences, Bolshoy 61, St. Petersburg 199178, Russia
Abstract
Shock loading influence on deformation martensite transformation is experimentally investigated in austenitic and perlitic
steels with different grain size. Martensite transformation front propagation velocities and their connection with grain size
are defined by means of combination two techniques: laser interferometer technique that pemits "in situ" to register time
characteristics of material response on shock loading; optical, electron microscopy and quantitative metallography The work
is devoted to regularity of martensite transformation running in steels under shock loading. The material under investigation
was different kinds of steels such as Cr-4Ni-Mo,
Cr-3Ni-Mo-V, 3Cr-Si-Ni-Mo-W-V, stainless austenitic 18Cr-10Ni-Ti steels. The light gas gun in bore diameter 37 mm was used
in these experiments. The specimens-targets were in the form of plane washers 52 mm in diameter and with a thickness of 5-10 mm.
They were impacted within velocity range 100-500 m/s. The laser interferometer technique was used for registration of shock
loading time characteristics. Cross-section targets microstructure was observed after etching using optical microscope Neophot-32.
Fine structure analysis carried out on the foils with the help of transmission electron microscope JEM-200CX. Martensite quantity
after loading was measured in stainless austenitic steel 18Cr-10NI-Ti by means of magnetic method with the help of local type
magnetic ferritometer. The quantity of
-phase was found to be equal (0,01-0,5) %.
© EDP Sciences 2003