Abstract
The precipitation hardening response, microstructure and mechanical properties of four Al – Cu – Mg – Ag based alloys containing 0, 0.25, 0.6 and 1.1 (wt-%) titanium were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). It was shown that increasing the titanium content from 0 to 0.6 wt-% increased the tensile strength at all test temperatures up to 350°C. The high strength of the alloy with 0.6%Ti is attributed to the high density and high thermal stability of fine ω precipitates and an additional titanium containing intermetallic compound (Al3Ti).
Get full access to this article
View all access options for this article.
References
1.
KANNO
M.
,
SUZUKI
H.
and
KANOH
O.
J. Jpn Inst. Light Met ., 1979 , 29 , 223 .
2.
SUZUKI
H.
,
KANNO
M.
and
KANOH
O.
J. Jpn Inst. Light Met ., 1980 , 44 , 1139 .
3.
HOWE
J. M.
: Philos. Mag. Lett ., 1994 , 70 , 111 .
4.
POLMEAR
I. J.
: Trans. AIME , 1964 , 230 , 1331 .
5.
TAYLOR
J. A.
,
PARKER
B. A.
and
POLMEAR
I. J.
Met. Sci ., 1978 , 12 , 478 .
6.
CHESTER
R. J.
and
POLMEAR
I. J.
‘The metallurgy of light alloys’ , 75 ; 1983 , London , Institute of Metals .
7.
POLMEAR
I. J.
and
COUPER
M. J.
Metall. Trans. A , 1988 , 19A , 1027 .
8.
POLMEAR
I. J.
: US Patent 4 772 342, 20 September 1988.
9.
AULD
J. H.
: Acta Crystallogr ., 1972 , 28A , 98 .
10.
SCOTT
V. D.
,
KERRY
S.
and
TRUMPER
R. L.
Mater. Sci. Technot , 1987 , 3 , 827 .
11.
MUDDLE
B. C.
and
POLMEAR
I. J.
Acta Metall ., 1989 , 37 , 777 .
12.
GARG
A.
and
HOWE
J. M.
Acta Metall. Mater ., 1991 , 39 , 1939 .
13.
ABIS
S.
,
MENGUCCI
P.
and
RIONTTNO
G.
Philos. Mag. B , 1994 , 67B , 465 .
14.
RINGER
S. P.
,
HONO
K.
and
POLMEAR
I. J.
Acta Mater ., 1996 , 44 , 1883 .
15.
MONDOLFO
L. F.
: ‘Aluminium alloys: structure and properties’ , 800 ; 1978 , London , Butterworths .
16.
SIGWORTH
G. K.
: Metall. Trans. A , 1984 , 15A , 277 .
17.
CHANG
Y. C.
and
HOWE
J. M.
Metall. Trans. A , 1993 , 24A , 1461 .