The fatigue properties of laser peened(LP) 7050 aluminum alloy specimens with fastener holes were investigated in this paper. At first, the surface profile and residual stress induced in the shock affected zone was characterized. Then, the fatigue specimens with notch were treated by LP, and the fatigue life of LP-treated specimens were measured and compared with base material without LP. The results indicated that LP improved the fatigue life of all specimens tested. In average, the fatigue life of specimens treated by LP before hole-drilling was 173% longer than that of untreated samples and had better effects than than those specimens treated by LP after hole-drilling.

Topics
Fatigue limit, Alloys
1.
J.M.
Yang
,
Y.C.
Her
,
N.
Han
 and
A.
Clauer
,
Laser Shock Peening on Fatigue behavior of 2024-T3 Al Alloy with Fastener Holes and Stopholes[J]
,
Materials Science and Engineering A
,
A298
, January 31,
2001
:
296
–
299
,
https://doi.org/10.1016/S0921-5093(00)01277-6
Google Scholar
Crossref
Search ADS
 
2.
Q.
Liu
,
K.
Ding
,
L.
Ye
,
C.
Rey
,
S.A.
Barter
,
P.K.
Sharp
 and
G.
Clark
,
Spallation-Like Phenomenon Induced by Laser Shock Peening Surface Treatment on 7050 Aluminum Alloy[C]
,
International Conference on Structural Integrity and Fracture, SIF
2004
:
235
–
240
.
Google Scholar
 
3.
Zhang
Yong-kang
,
Ge
Tao
 and
Lu
Jin-zhong
,
Experimental study of laser shock processing on critical section of flying hammer[J]
,
Journal of Jiangsu University:(National Science Edition)
26
(
5
) (
2005
):
369
–
371
Google Scholar
 
4.
Zou
Shikun
,
Wang
Jian
,
Zhao
Yong
 and
Xiao
Siyin
,
Effects of laser shock processing on the fatigue properties of rivet joint (I)[J](in Chinese
),
Applied Laser Technology
,
2000
,
20
(
6
):
255
–
256
.
Google Scholar
 
5.
ZOU
Shi-kun
,
TAN
Yong-sheng
,
Fatigue Grouth Rates of Laser Shock Processed Metal Sheet[J] (in Chinese
),
Chinese Journal of Lasers
,
31
(
Suppl
.), March,
2004
:
270
–
272
.
Google Scholar
 
6.
Zou
Shi-kun
,
Tan
Yong-sheng
,
Guo
Da-hao
,
Wang
Sheng-bo
 and
Wu
Hong-xing
,
Effect of Laser Shock Processing on Mechanical Properties of Al-Li Alloy
[J] (in Chinese),
Chinese Journal of Lasers
,
31
(
3
),
March
,
2004
:
371
–
373
.
Google Scholar
 
7.
R.A.
Pell
,
P.J.
Mazeika
 and
L.
Molent
,
The Comparison of Complex Load Sequences Tested at Several Stress Levels by Fractorgraphic Examination[J]
,
Engineering Failure Analysis
,
12
(
2005
):
586
–
603
.
https://doi.org/10.1016/j.engfailanal.2004.09.007
Google Scholar
Crossref
Search ADS
 
This content is only available via PDF.
© 2008 Laser Institute of America.
2008
Laser Institute of America
You do not currently have access to this content.