Van den Beukel_1976_Inhomogeneous plastic deformation in a Au-Cu alloy

Van den Beukel_1976_Inhomogeneous plastic deformation in a Au-Cu alloy

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: s i t y and average v e l o c i t y o f m o b i l e d i s l o c a t i o n s and L t he o b s t a c l e d i s t a n c e . From a d i f f e r e n t k i n d o f e x p e r i m e n t van den B r i n k e t al [8] found t h a t a t E i n t he same a l l o y c pL = 1 . 7 106 . £ 0 .88 . c cm-1 (12) a t room temperature. F rom (10), (11) and (12) and using K 2 = 1 /10.2 sec, m = 1.47 it follows =0.25 .c 2 .35 c to be compared with the experimental T he agreement seems reasonable. result ~ = 0.21 .~ 2 .4 at room temperature. 4. SUMMARY It was assumed that inhomogeneous deformation starts when the increase of solute c oncentration at the dislocations exceeds a critical value. From this it was derived t hat the condition for inhomogeneous deformation in substitutional alloys depends o n strain, aging time and temperature as described by equation (7). This condition w as tested in a AuCu 14 alloy and found to agree with experimental results in the c ases of first yieling, repeated yielding and serrated yielding. A t constant temperature the Ii~ders strain Ac. was found to be the same function o f prestraln and aglng t me for all three types of inhomogeneous deformation. • • L R EFERENCES I. 2. 3. 4. 5. 6. 7. 8. S.H. van den Brink and P.G. Mc. Cormlck, Scripta Met. --8 (1974) 125. A. Wijler, Thesis Delft 1972. P.G. Mc. Cormick, Acta Met. 20 (1972), 351. A. van den Beukel, Phys. Sta'~. Sol. (a) 30 (1975) 197. J. Friedel, Dislocations p. 405 Oxford 19-'~4. A. Wijler, M.M.A. Vrijhoef and A. van den Beukel, Acta Met. 2__22(1974) 13. B.M. Korevaar, Thesis Delft 1960. S.H. van den Brink, A. van den Beukel and P.G. Mc. Cormick, Phys. Stat. Sol. (a) 3 0 (1975) 469. No. 6...
View Full Document

This document was uploaded on 01/23/2014.

Ask a homework question - tutors are online