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Optimization of parameters of processing by impulse pressure for decreasing a porosity of metals and alloys

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2 Author(s)
Kurlayev, N. ; Novosibirsk State Tech. Univ., Russia ; Gulidov, A.

The numerical modeling is carried out for research of major factors of load and physical-mechanical characteristics at impulse pressure processing of metals and alloys, in particular to impulse magnetic field (IMF), for decreasing a porosity arising in master schedules of manufacturing of parts. The full model of mechanics of a deformed solid in bivariate and axisymmetrical statement is used at a numerical modeling. Amplitude and valid time of impulsive load are major factors, which influence closing of fractures of pores. A fractional porosity and dynamic yield strength of metal or alloy determine the amplitude of load. The momentum of pressure in a zone of a pore (IΠ) is the characteristic of process of closing of fractures of pores irrespective of a way of pulse processing. The momentum of pressure in a zone of a pore has extreme value. The maximum rating of value IΠ meets to minimum load indispensable for the achievement of full closing of the fractures of pores. Thus, this property can be used for statement of problems of optimization. With the help of numerical calculations and the optimizations for an impulse forming of metals and alloys, in particular by pressure of IMP, the nomographs of definition of demanded technological modes taking into account properties of metals and alloys and parameters of processing can be executed.

Published in:

Science and Technology, 2004. KORUS 2004. Proceedings. The 8th Russian-Korean International Symposium on  (Volume:3 )

Date of Conference:

26 June-3 July 2004

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