Prokof'yeva O. Perfection of the calculation and design methods for twist extrusion process

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0408U003722

Thesis Registration Form

0408U003722.pdf

Applicant for

Prokof'yeva Oksana Victorivna

Specialization

05.03.05 - Процеси та машини обробки тиском

Date of defense

19-06-2008

Specialized Academic Board

Д 11.052.01

Essay

The object of research is a process of severe plastic deformation - twist extrusion (TE). The purpose of research is the calculation and design methods perfection for the TE efficiency increasing and the mechanical properties of billets improvement on the basis of the stress-strain state research and the metal structure and properties formation model development. The active areas of a die contact surface with a billet were revealed for TE. It was shown that metal flow within the limits of a billet cross-section can be described by simple shear conversion combined with simultaneous rotation, proportional to the shear corner. On this basis the experimentally-calculation method was perfected and became suitable for the TE design. The model of materials structure and properties formation under TE was devel-oped. The method of design process was perfected by application of the object-oriented approach, and 4 design operations were developed. The results of the thesis were used for development of the technological chain for ti-tanium wire production with TE application and for validation of dies twist channel height reduction for secondary aluminium alloys treatment. Field of application the results of work is the design metals deformation treatment by TE method for further manufacturing of high-duty details for the microelectronics, machine building and medicine.

Thesis supervisor

Beygelzimer Yakiv Yukhimovich

Official opponents

Рябічева Людмила Олександрівна
Савченко Олег Костянтинович

Files

Автореферат--Текст автореферата.doc

Автореферат--Титул_автореферата.doc

Дисертація--часть 1 - (ВВЕДЕНИЕ).doc

Дисертація--часть 10 - (ПРИЛОЖЕНИЕ Б).doc

Дисертація--часть 11 - (ПРИЛОЖЕНИЕ В).doc

Дисертація--часть 2 - (РАЗДЕЛ 1).doc

Дисертація--часть 3 - (РАЗДЕЛ 2).doc

Дисертація--часть 4 - (РАЗДЕЛ 3).doc

Дисертація--часть 5 - (РАЗДЕЛ 4).doc

Дисертація--часть 6 - (РАЗДЕЛ 5).doc

Дисертація--часть 7 - (ВЫВОДЫ).doc

Дисертація--часть 8 - (ЛИТЕРАТУРА).doc

Дисертація--часть 9 - (ПРИЛОЖЕНИЕ А).doc

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