! “# $ ۲۰۲۴
3 2* 1

%&
34 -5 .$3 ! ” # $ % ! % & ” ’ $( ) * + , – .+ /0 ,+ 1 2 34 -5 @ 7 >3 ? . ! : 1 ; / < ,% =7 /0 .+ GP 89 $ * + , % 7 , – .+ * A B .H! $I ! ! G /! . + ’ – A * A B E F $ -5 2024 4 -5 2 ! * A B + )M . : 3 M E 2 >! ( + ! F N! % J B ’ .+ 3 +5 K .AL M<+ ! > )M SB + .( ’ , % 7 ! TP * + R $ O 7 ! ; J B + P$7 Q + >! ( .N /!
.: 2 .UV< ,+ 1 >3 ( ’ F % / W I

. % ! % & ” ! /0 ,+ 1 2 34 -5 : !

:; ! /%- TY ’W ! $P ’% ! $P >0+ $P $( 2N ! -1 [email protected]
. ’W ! $P ’% ! $P >0+ $P $ ( 2N ! J [Y ’ $Y ! -2 [email protected] :; ! /%- TY ’W ! $P ’% ! $P >0+ ! -3 [email protected] :.- \ J Y ’ $Y ! -*
, #1 3T , – .+ ; / < ,%
l )+ O+ – 7 ! 7 F B 2 N7 2 3 + ( F B . $ + ! F Q ( 2 – 7 E” W/ F B T 1 Q + – 7 m ! % , – + ! $ M
3 n ): .T . 7 Y+ ./ – 7 .( $ -5 2 34 -5 %46 V .( $3 !
$+ , M a * L .+ ! : 1 ’ ^/
,+ 1 2 34 -5 ! U$ + 2 2 3 n<7 .[15]
* L – A * A B E F $-5 /0
.+ + / U$ + 3 >3 ? 7> + .T ./M : ’ ” h 7 ,% + .#Aj R $ & ” 4 / ! E ) Y+ 2 3 ! * A B
-16 ,14]T ./M : F N! ( 2 3>! ( T 7 (]
M E ’^/ W 2 [19 E ( 2Q + f” , – .+ 2 3 >! ( 2 t/1 U! Q + 2 3 O7 ] 4 / ! + ! $M F N! TO$L .+ ! .$ P+ 2 ’ P+
3 7> + >! ( .N /! 7 ( 2 3 O7 U$ + >3 ? + $+ .T .$ P+
$B .+ ’ *<% + .#Aj R$ & ” .+
K .AL M<+ 2024 F $-5 4 -5 ! %3 ;
5 GP 89 $ N 7 ! 3 +5 J B % .N /! . 2 : A h 7 , % 7
E 2 ! 7 ( O7 Q + 2 3 >! (
% ! % & ” .+ + / U$ + .: 3 M
T 7 E 2 2024 F $-5 2 3 a u Af
$/M : 1 % >! ( 7 > + + ! $I
@d7 TM : F N! 3 5 2 2 * A B Kv
]7 % ! % & ” + ! : ! : 2 3 $M
.TM : 1 .O- f * +

-+, ,
R ( 7 / A 5 T 0 .+ 2024 F $-5 a
>3 ? T ’ ’5 1 J .(
. 495 2 3 .! ! .TM : 1 ’ ^/ ’ – A * A B .\ 1 60 * .+ : /! 7> + + ! * AB . ! 3 +5 u5 Kv ’()*
/ , – .+ F $ -5 /0 ,+ 1 2 34 -5 ] $L ’ /Y: 2. ! : .+ .+ F % / T#Y!
F $ -5 4 -5 . ’ ^/ _M 3 )M 4 -5 .T ./M : 1 . 7 Y+ 2024
/0 ) 7 > + F % / +
2 34 -5 F % / + Q + .T F $ -5 2 34 -5 24 -5 L $B .T * + ! /0 ,+ 1 .T ) $ K , 2024 4 -5 2 ’ B CuAl2 5 .+ 4 -5 .( 7 + ’ B J A 2 M .- / .N /! .( T CuMgAl2 & ” .[1] 5 T + F $ -5 ‘ # a M
* .+ /0 ,+ 1 2 34 -5 % ! % % ) M 2 3J .T * + ] 7 /” @d7 T 7
, – .+ ; / < ,% =7 2 3 $M ”
.+ R $ 2 g e fO! F % / + 3 /” N .[2] ! : 1 ’ ^/ ’ /Y: 2 .! : , % 7 , – .+ /0 ,+ 1 F $ -5 2 34 -5 ,% =7 T 7 /0 .+ GP 89 $ * +
W GP 89 $ .[3] ! : 1 ; / <
+ O #9 2 V .( .! * +
.N /! : 3 .+ ! T( V 2 A 5
’ $ M V + $+ ./M >3 ( ./ A /( 5 $ 5 M ,% + .#Aj U$ + .[4 ,3] ” h 7
F N! Q + 2 3 ‘ # a M 2 34 -5 ,% ,3] ’ 2 M .+ N$ ! 7 ( .
. 5 ! T+ F % / 7> + .N /! [13-5
* + , % 7 2 W + 7 W 2 h 7 ,% + ,% =7 $ M > GP 89 $ e 3 + . 5 8 M 3 ,% V .Of1 ” 2 PW! Y+ 2 $ M > + * Of1
$M .Of1 3 +5 + ! .AL M [14] !
7 .( ! .AL M .+ .[4] + >3 ( ,% =7
T F N! ,+ 1 T \M + ,% $M 5 >
=7 2 3 $M ’B .[4] ./^: !+

.T ./M : 1 C .!! .+ T#Y! 2 7 Y+ ,%
.+ ! – 7 \ E .( T
>! ( , – .+ $( T 7> + C .! ! .! ! 2 7) ] 7 7;I ( .! ’ ! ; 7Q +
.( T \f$ + $+ .T + / ,+ 1 * +
7> + C .!! E .!! 2 g e fO! F % /
/Y0! K ’ 3 .( .! : 3 .+
+ .Y \ .7 ,+ 1 2. ! : .+ F % / !
J B T ./M > )M ’ – A * A B .!!
( F % / 2 + 2 @d7 7> + 2 3
3.! ! % ! % & ” #P+ U$ + . ! ’ 2 : ! : 2 3 * .+ 160 °C 2
2 3 K 3.! ! /0 ) 2 ,% .! 2024 24 -5 2 3 .! ! .3 ! 2 : ! : > + .+ ! ! 2 (T6) – O .! : .+ .(
190 °C 2 7V * A B TB 8
2 3 .! ! 2 ; ’ 3 .( .! : 3 2 TB 4 7 ( * ’ !
2 3 .!! >! ( ->$7 2 3! . 3 m 160 °C
’ 3 3 ,% 2 * A B K ’ ! K ’ ! 2 3.! ! % ! % /M .
> )M T .+ { # \7 2 * A B
K 3 .! ! % ! % & ” + . 7 ,+ 1 [email protected] 3 2 3 .! ! ( F % / J V + . ! 2 2 3 .! ! W I 2. ! : .+ ’ 2 ! t7 4 ,% .T 7> + – O ’ 2 2 3 .! ! /” ) SEM ! /%- z % % | \! EDX ) – !5 + .3 ! : ! :
.7 + .(5 ,% ) + u .$ ^
! $ M 9 * + 2 ) 4 ,% .+ 7 G /! + .! , % 7 ! TP m ! $ M V 3 u F) ! % .( T^: ; / < F M =7 V ; $ 3 u . 3
3 m ‘ # a M E F $ -5 2 34 -5 2 .+ ; $ 3 u ’ .[25-21] 5 .( T ./Y+ (DSA) ; $ ! ( 2 3 $ M .TM : F N! % ]f\ wf >3 ( 2 J TM : F N! >3 ? .( ! : ! : E 2 3 .! ! ” + T $/^: . ’ 3
,V U$ + . $/+ 2 .#- h 7 ! $M V
. ! ! 7 ( >! ( + $I 9 3 .!! ,%
* A B 3 .!! % ! % & ” #P+ U$ +
18 .$ + * + 160 °C 2 2
+ .+ F Q . F N! TB 2 ! .AL M + TB
2 U$ + .( 7V * A B 2 .( T
(T6) – O * L .+ 2024 F $ -5 2 3 .! ! ; /M U$ + . + 190 °C ’ ^/ gj ( + 3. ! ! . F N! /0 ) 5 /0 P! * A B ! > – 3000 ’ 7 ’ #
. F N! . – ” $ -5 ’ ^/ + > 15 * .+ .( + F : 200 + % /0 ) 5 F % / .TM : F N! J B 3 .! ! + . ! @
* A B K > ! + .! ! 3.! ! ( . + > ( 5 ’ ^/ + 2 7 V
2 ’ 5 ASTM-E8 ! / + 3 .! ! . – >! ( m ! + E 2 > ( 5 .
Instron > ( 5 ’ W/ ’ ^/ + 2×10-3 . F N! ’ ^/ + 2 K > 3 .! ! /” ) TESCAN ‘ ! + ! /%- z % %
. + EDX .+ )PN

./$ , 0 ’
’ 5 1 ,% 3 .! ! > ( 5 2 3 ! /Y0! J B K .( ’ 3 .T ’ . + > )M * .+ ’ F % / !
( F % / >3 ( 2 \ D 2 .! ! .( TY – V /M . 3 ! ” C .! ! .+ T#Y!
+ ( @ + A” u B N , – .+ ! 7
2 3 .! ! F % / .( ’ 3 $I 3 .[20] 2 g e fO! C .! ! $I 3 .T Y% { # \7 E C ’ ’ ! 2 J .( .! : 3 . 2 7 (
=7 ! /Y0! K E .!! T 7> + .( 5 . A#1 * + ’ $( F Q g- } ! , % 7 ! $ M V * + >3 ( 2 ; .+ 2 * A B 2+ egV + ! K 2 7 V * A B . + #P+ SB + ! @ ’ 5 + – /Y ( u B > )M $( + )M } : 2 g e fO! 2 V ) * + N , – .+ 2 g e fO!
.( 5 + > )M ’ F % / 2 V 7 T ’ 5 + ! $ M V * + ’ B
! 2 3 .! ! ( F % / .TY ! W I > )M 7> + %50 V (J % W 540 ) ’ 2 (J % W 350) – O T6 ’ 2 2 3 .! !
! ; F N! T^: 7 ‘N .+
3 .!! 2 5 K E 2
> )M R -O 2 7 ( 2
. ’ % ! % & ”
) * + , – .+ 3 .!! 2Q + F % /
2Q + ./ Y! ! /0 >! ( ’ $( N ’ ! V .( 3 .+ !
+ . + ! F N! @ + .! ’ ! >3 ( 2 O+ 2 3 ’ , % 7 ! /Y0! V
3 .+ ! T( V .: 3 5 ” R
L .+ * + , % 7 ; / < ,% =7 @
. R { /#Y! 2 3 /V ’ $(
$I 3 .! : 3 N+ ! T( V 2 A * + V 3 .+ ! %7 R ! 7 * +
3 .+ ! ] N7 m ! + $+ . ! + >! ( J B
N ; / < F M =7 V * + .( W$3
& ” #P+ R 3 F) ! % .T 7> + .+ ’ F M =7 T A+ 1 $I 3 ’ % ! % 4 -5 I ~\! 24 ! . + >3 ( W I 2. ! :
2 A SB + ‘ }T ( ‘ # a M
>3 ( + ’ .H! $I g- . ./M : ;$ ++
% ’ F M =7 %75 H 3 ]f\ wf
/0 ( m ! @ + ! $ M V .! ! ” h 7 J A 2 3 7 TUAj 3 u V .

! .! 2 + .( J A 2 3 7 . – 2 3 .”
N DSA .A .+ T ! * + . 3 J A 2 3 7 3 .+ ! .( ! .
2 3 7 ’ ! .+ 2 3 .” (J 7 ( ^Y 7)
T( V .: * + ! .! SB + ! 7 J A
F N! 3 .+ ! T( V + .( J A 2 3 7
P7 ,+ 1 ) .+ ;$ 3 u R# ! 7 – WI ! V >! ( J B @ + .[21]
.N /! } N ’ 3 .+ ! Q +
TP ;$ 9 .+ * + P7 ,+ 1 \ A .!! /” ) 4b 4a ,% . 5 + !
.+ 4f 4e 2 3 ,% . 3 ! 2 >
> E C 2 3.! ! 2 3 /”) R 7 7
7 > + .( ’ 3 .3 ! 2
! TP ! /Y0! J B K * +
) 7> + 2 3 J B + , % 7
” * + ! T+ @ { # \7 * +
.(E C 2 3 .! ! ) ’ $( 3 .+ . # Y+ E C 2 3 .! ! /” )
& ” 2 + 7 ! 7 T O1 . $+
* A B .(1b ,% ) + 3 .!! .+ % ! %
.+ ) * + , % 7 R ! K 2
.( A#1 * + T J /V
.(4d 4c ,% ) T ’ 3 ,+ 1 7 > + ! l )+ K > 3 .! ! % ! % & ” 6 ,%
’ 3 .( .! : 3 . 3 ! 2
%50 ]f\ wf >3 ( ) + ! ; J B
J % W 500 J O AY7 >$7 .+ + / SB + ’ – A * A B 2 .! ! + .Y \ .( :
’ AY7 >$7 J % W 350 V )M R ; $ 3 u F) ! % . ’ 3 g- ! /Y0! V ) * + N
. + >3 ( ’ .$ J A 2 3 7 TUAj .+ P 7 ,+ 1 u ! 2 O+ 2 3 V .N /! F N! , – 3 .+ . ! , % 7 ; $ * L } ! % ! % & ” 2 )Y+ @ 7 7 > + 2 3
” SB + ! 7 > + 2 3 J B $I 3 * .( ! ! G /! + )M . 3
,+ 1 2 \ .+ Q + >! ( + ! K 2 * A B .$ P+ Y+ 2 t/1 U! .( + >3 ( . 7
’B .( ! 2 /” ) 2 3 + .T
/Y0! F W$3 ; $ 3 u @ * + > )M , % 7 ! TP !
SB + / + ! * + \ + $I [email protected] 7
. .$ * + : $( W/Y%

5)6
.( $! F Q ” + .- \ : $Y !
F N! TP .+ ! \3 $P $P * V
)( (SEM) ! /%- z % % 2 3 + . $$( ! 1 2 )W v 2 24 – / * \ \ 7
> )M >$ I ~\! 24 ! + $+ } + >3 ( .( >! ( + )M T- V $I 3 .[26] +
* + ’ J B ’ .+ A#1 2 3 V V + $+ . ’ 2 g ( >3 ( R ) !
’ ]f\ wf >3 ( .H! $I 2 O+ 2 3
. + > )M ’ ” h 7 % +

4123 ’
’ – A * A B F $-5 2024 4 -5 2 3 .!!
1 >! ( + ! * A B $I
+ ! /Y0! F N! .( ! ! G /! .TM : F % / %50 V .7 ,+ 1 )M Q + >! ( @ 7 3 O7 F > )M R# ’
K 2 * A B . ! ’ F % / + ! $I > )M ’ 2 g e fO! 2 W I \ .+ !

Refrences
1- H. Kaçar, E. Atik, and C. Meriç, “The
Effect of Precipitation-Hardening Conditions on Wear Behaviours at 2024 Aluminium Wrought Alloy,” Journal of Materials Processing Technology, Vol.
142, pp. 762-766, 2003.
+”.F . + .F .F Y% . . < -2
-K 2 . Q T v ( Y 9 $= % ! % & ” “(ARB ) O N7 ! J t7 n .+ ’ – 7 ,% !
-89 & 3 ’ F ’ ! . !
1392 /Y+ 7 104
N. Q. Chinh, J. Gubicza, T. Czeppe, J. Lendvai, C. Xu, R. Z. Valiev, and T. G.
Langdon, “Developing a Strategy for the
Processing of Age-Hardenable Alloys by ECAP at Room Temperature,” Materials Science and Engineering: A, Vol. 516, pp. 248-252, 2009.
M. R. Roshan, S. A. J. Jahromi, and R.
Ebrahimi, “Predicting the Critical Pre-
Aging Time in ECAP Processing of AgeHardenable Aluminum Alloys,” Journal of Alloys and Compounds, Vol. 509, pp. 7833-7839, 2011.
M. Cai, D. Field, and G. Lorimer, “A
Systematic Comparison of Static and Dynamic Ageing of Two Al–Mg–Si
Alloys,” Materials Science and
Engineering: A, Vol. 373, pp. 65-71, 2004.
J. Gubicza, I. Schiller, N. Chinh, J. Illy,
Z. Horita, and T. Langdon, “The Effect of
Severe Plastic Deformation on
Precipitation in Supersaturated Al–Zn–Mg Alloys,” Materials Science and
Engineering: A, Vol. 460, pp. 77-85, 2007.
7- J. Kim, H. Jeong, S. Hong, Y. Kim, and
W. Kim, “Effect of Aging Treatment on Heavily Deformed Microstructure of a
6061 Aluminum Alloy After Equal Channel Angular Pressing,” Scripta
Materialia, Vol. 45, pp. 901-907, 2001. 8- W. Kim, C. Chung, D. Ma, S. Hong, and H. Kim, “Optimization of Strength and Ductility of 2024 Al by Equal Channel
Angular Pressing (ECAP) and Post-ECAP Aging,” Scripta Materialia, Vol. 49, pp. 333-338, 2003.
9- W. Kim and J. Wang, “Microstructure of the post-ECAP aging Processed 6061 Al alloys,” Materials Science and
Engineering: A,Vol. 464, pp. 23-27, 2007. 10- J. Mao, S. Kang, and J. Park, “Grain
Refinement, Thermal Stability and Tensile
Properties of 2024 Aluminum Alloy After Equal-Channel Angular Pressing,” Journal of Materials Processing Technology, Vol. 159, pp. 314-320, 2005.
C. Nam, J. Han, Y. Chung, and M.
Shin, “Effect of Precipitates on Microstructural Evolution of 7050 Al
Alloy Sheet During Equal Channel
Angular Rolling,” Materials Science and Engineering: A, Vol. 347, pp. 253-257, 2003.
H. J. Roven, M. Liu, and J. C.
Werenskiold, “Dynamic Precipitation During Severe Plastic Deformation of an Al–Mg–Si Aluminium Alloy,” Materials Science and Engineering: A, Vol. 483, pp. 54-58, 2008.
Y. Zhao, X. Liao, Z. Jin, R. Valiev, and Y. Zhu, “Microstructures and
Mechanical Properties of Ultrafine Grained 7075 Al Alloy Processed by ECAP and their Evolutions During Annealing,” Acta Materialia, Vol. 52, pp. 4589-4599, 2004.
S. K. Panigrahi and R. Jayaganthan, “Development of Ultrafine Grained High Strength Age Hardenable Al 7075 Alloy by Cryorolling,” Materials and Design, Vol. 32, pp. 3150-3160, 2011.
S. K. Panigrahi, R. Jayaganthan, and V. Pancholi, “Effect of Plastic
Deformation Conditions on
Microstructural Characteristics and
Mechanical Properties of Al 6063 alloy,” Materials & Design, Vol. 30, pp. 18941901, 2009.
S. K. Panigrahi and R. Jayaganthan, “A
Study on the Mechanical Properties of
Cryorolled Al–Mg–Si Alloy,” Materials Science and Engineering: A, Vol. 480, pp. 299-305, 2008.
S. K. Panigrahi and R. Jayaganthan,
“Development of Ultrafine Grained Al– Mg–Si Alloy with Enhanced Strength and Ductility,” Journal of Alloys and Compounds, Vol. 470, pp. 285-288, 2009. 18- P. Das, R. Jayaganthan, T. Chowdhury, and I. V. Singh, “Fatigue Behaviour and Crack Growth Rate of Cryorolled Al 7075
Alloy,” Materials Science and Engineering: A, Vol. 528, pp. 7124-7132, 2011.
R. Jayaganthan, H. G. Brokmeier, B.
Schwebke, and S. Panigrahi,
“Microstructure and Texture Evolution in Cryorolled Al 7075 Alloy,” Journal of Alloys and Compounds,Vol. 496, pp. 183188, 2010.
M. A. Meyers, A. Mishra, and D. J. Benson, “Mechanical properties of nanocrystalline materials,” Progress in Materials Science, Vol. 51, pp. 427-556, 2006.
A. Deschamps, F. Bley, F. Livet, D.
Fabregue, and L. David, “In-situ smallAngle X-ray Scattering Study of Dynamic
Precipitation in an Al-Zn-Mg-Cu Alloy,” Philosophical Magazine, Vol. 83, pp. 677692, 2003.
A. Deschamps, L. Le Sinq, Y. Brechet,
J. Embury, and M. Niewczas, “Anomalous Strain Hardening Behaviour of a Supersaturated Al-Zn-Mg alloy,” Materials Science and Engineering: A, Vol. 234, pp. 477-480, 1997.
A. Deschamps, M. Niewczas, F. Bley, Y. Brechet, J. Embury, L. Le Sinq, F. Livet, and J. Simon, “Low-Temperature
Dynamic Precipitation in a Supersaturated AI-Zn-Mg Alloy and Related Strain Hardening,” Philosophical Magazine A, Vol. 79, pp. 2485-2504, 1999.
M. Hornqvist and B. Karlsson, “Effect of Heat Treatment on the Strain Hardening Behaviour of an Al-Zn-Mg Alloy,” International journal of materials Research, Vol. 100, pp. 1574-1581, 2009.
M. Hornqvist and B. Karlsson,
“Dynamic Strain Ageing and Dynamic Precipitation in AA7030 During Cyclic Deformation,” Procedia Engineering, Vol. 2, pp. 265-273, 2010.
– 7
.+ !C3 AB1 2024 %& (’ <! = 9>? 0 ) ’ 9 0: – 1 5! 4 -5 Cu Mg Zn Si Mn Fe Al
2024 4/93 1/1 0/126 0/185 0/288 0/461 \+

. 0 56 E FF $ 0- -2 5! .!! $M A / A 2/5 T 0 7 ! B / A 1/6 2/05 2/5 R 7 7 .+ 2 3 T 0 7 !
C / A 1/25 1/6 2/05 2/5 R 7 7 .+ 2 3 T 0 7 !
D / A 0/95 1/25 1/6 2/05 2/5 R 7 7 .+ 2 3 T 0 7 !
E / A 1/25 2/5 R 7 7 .+ 2 3 T 0 7 ! FAIL / A 1/25 T 0 7 !

’: 0? I6 < GJK (E : A) 01 ! (ST) ’%H I6 + 0 – +$: -1 G(
.< 10 3

.< 10 3 E < 9>? 0 ’BL1!0( -2 G(

I6 < M3 (E : A) 01 ! (ST aged) ’%H I6 + 0 – +$: -3 G(
.< 10 3 ’: 0?

(f)! (e) O < 10 3 < M3 A (d)! (c) O < 10 3 < + 3 A (b)! (a) O B* 1 , -4 G(
.< 10 3 E! E! C

.B $< ! A A1 Q R EDX , % & (c) ! (b) O $< ! I1 < SEM 0P: (a) -5 G(

’: 0? I 6 < M3 (b) < 10 3 ’: 0? I 6 < + 3 (a) ’SS I = P* -6 G( . ’ E! (T6) ’% T < 10 3 STA ! ’ & Q 0 ST .< 10 3



قیمت: تومان


پاسخ دهید