ISSN:
1573-9325
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Variation in the mechanical characteristics of steels 20 and 12Kh18N10T is indicated from the results of the quasistatic uniaxial tensile testing of flat proportionally short specimens fabricated from thick-walled plates treated under a pressure pulse to 2 GPa with a duration to 10 μsec. In calculating the mechanical characteristics, a cross section in the form of a curvilinear trapezium was replaced by a rectangle of equivalent area. It is established that the variation in the mechanical properties depends on the magnitude of the compressive strain generated under a pulsed load over the thickness of the plates. Tension diagrams from which it follows that the yield point and ultimate strength increase, and the relative elongation after failure decreases with increasing preliminary pulsed compressive deformation, are presented. The yield site that exists on the tension diagram of steel 20 specimens in the as-delivered state vanishes after shock treatment. The characteristic feature of a sharp (by ∼30%) increase in the yield point of steel 12Kh18N10T is observed on attainment of a small (to 1%) pulse deformation, with whose increase the relative necking after failure of both metals investigated diminishes somewhat.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00777221
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