Izvorni znanstveni članak
Lattice constant of Al-rich a-phase in equilibrium with different precipitates in Al-Zn alloys
Stanko Popović
; Physics Department, Faculty of Science, 10001 Zagreb, P.O.B. 162, Croatia
Biserka Gržeta
; Ruđer Bošković Institute, 10001 Zagreb, P.O.B.˙1016, Croatia
Hans Löffler
; Martin-Luther Universität, D-06099 Halle (Saale), P.F.˙8, Germany
Gottfried Wendrock
; Martin-Luther Universität, D-06099 Halle (Saale), P.F.˙8, Germany
Sažetak
A series of Al-rich Al-Zn alloys were studied by X-ray diffraction at room and elevated temperatures. Using the present results and those cited in literature, the following conclusion can be drawn. The lattice constant, a[α(M/P)], of the matrix, i.e. the phase α(M) in contact with various sorts of precipitates, P, depends on the initial Zn content, x, only in case of fully coherent P, i.e. GP zones. In other cases, where P’s are semicoherent or incoherent α′ R, α′ or β(Zn) phases, a[α(M/P)] is independent of x, but increases with diminishing degree of coherency. The difference in the Zn content between P and α(M) determines the observed changes of the lattice constant.
Ključne riječi
Hrčak ID:
299562
URI
Datum izdavanja:
1.9.1995.
Posjeta: 161 *