The us 
peer 
betatiz 
phase. 
phase 
r 5,C0 
The m 
Cup Als 
K-M 
grainbo 
Figure 12: Microstructures of betatized and annealed specimens, a — betatized, b — annealed at 500°C, c — The ho. 
annealed at 600°C, d — annealed at 650°C, e — annealed at 700°C, f— annealed at 750°C i 
angi 
In Fig. 12 the microstructures of betatized and annealed specimens are shown. Fig.12a shows mines 
the known microstructure of the betatized specimen consisting of ordered bec 3; — phase and The od 
small x — precipitations. The annealing at low temperatures ( below 700°C ) produces the Some § 
formation of small y, — particles and the transformation of the $, — phase into the ordered By the 
orthorhombic Bp; — phase ( Fig.12b, 12c and 12d ). By the application of higher annealing obser: 
temperatures ( 700 and 750°C ) these transformations also take place. However the y, — phase The am 
appears now seam — like at the former ß — grainboundaries and in a rosette — like form inside temper 
of the former PB — grains ( Fig.12e and 12f). 
ordered bee B + x — complex cubic y; + ordered orthorhombic f; + x ern 
2-Theta - Scale UNJUERSITAET ROSTOCK 82-Sep-2008 12:02 
——————r— m m ee reer mr Tr pp —— 
al 
© 25 38 35 48 45 50 8S 60 65 70 75 B2 85 90 gs 1ee 
epsom err 
i 
| | 
. u | 
. | | 
25 30 35 48 45 so 55 68 65 789 75 ee as SR 95 129 
C :\USERDATA\SP?950EL .RAK Unnamed - B (CT: 1.4s. SS:@.950dg, WL: 1.548600) 
2-1231 I CuZn Zhanghengite, syn (WL: 1.5506R0) 
66-8695 Fe3al Aluminum Iran (WL: 1.525500) 
C -\USERDATA\EA2608 .RAW Unnamed - B (CT: 2.Ss, SS:@.QS@dg, WL: 1.548600) 
24-0083 C Cu%Ai4 Aluminum Copper (WL: 1.5386A0) 
28-2085 1 AICu3 Aluminum Copper (WL:@ 1.5386A0) 
6-8695 Fe3Al Aluminum Iron (HL: 1.53@6R0) 
Figure 13: X — ray diffraction patterns, lower diagram — betatized specimen, upper diagram — betatized and 
annealed specimen. the reflection positions of the phases are marked by vertical lines 
768