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:
The present work was performed in order to analyze the influence of the outer corner radius (R) ofECAP die channels on the strain field of billets subjected to ECAP deformation in a Φ = 120o die,employing three different methods: (i) physical simulation, consisting of the direct measurement ofdeformations of a grid inscribed in longitudinally cut mid-planes of ECAPed billets; (ii) numericalsimulation employing an explicit finite element code for large displacements and large plasticdeformations, and (iii) calculation by the Iwahashi formula. Materials employed were Al-4%Cu andan eutectic Pb-62Sn alloy, and the dependence of shear strain with R was satisfactorily describedusing the three methods. The experimental method showed a small deviation from the other two,which was explained making use of the corner die formation concept. Similarly, this concept helpedto understand the increase of strain heterogeneity with R. Also, it was shown that large corner radiidecrease ECAP pressing loads, facilitating deformation of high strength materials. Finally, the datashow that the deformation characteristics of the materials here studied do not exert a measurableinfluence on the shear strain magnitude and distribution
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.584-586.145.pdf
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