ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this article we present the results of the experimental research and those of theprocesses developing the crystallographic texture of computer modeling in CP Ti in the process of1-4 equal channel angular pressing (ECAP) passes along the route ВС. The goal of the research wasto determine the active deformation mechanisms, depending on the strain degree, accumulated inthe ECAP process. The research was carried out by the method of X-ray analysis and by computermodeling. Computer modeling was carried out on the example of visco-plastic self-consistentmodel. Thereby, the basal, the prismatic and the pyramidal (of the 1st and of the 2nd order) slipsystems were considered as possible active slip systems. Besides, the possibility of activating thetensile and the compressive twinning systems were taken into consideration. As the result of thecarried out experimental research, the objective laws of forming preferred orientations weredetermined. For the first time, with the help of computer modeling, made up to the 4th ECAP pass, itwas shown that the crystallographic texture development processes in CP Ti in ECAP, realized attemperature of 723 K, can be explained by activation of the basal, prismatic and pyramidal (of the1st order) slip systems and compressive twinning systems. Therefore, the increase of the ECAPpasses can lead to amplification of contribution of the basal and prismatic slip systems, as well asthe insignificant weakening of the contribution of pyramidal slip systems (of the 1st order).Moreover, the compressive twinning can become obvious only in the 1st ECAP pass
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.584-586.765.pdf
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