TY  - JOUR
T1  - Evaluation the Effect of Shot Peening Time on Static Torsional
Strength of AA7178-T6
AU - Saleh Shatha, Ali Hassan AU - Abduljabbar, M. Rajaa AU - Namaa Abood, Adnan AU - A. Abdulhadi, Hassan 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 12
SP  - 4476
EP  - 4481
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.4476.4481
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.4476.4481
KW  - Torsion test
KW  -shot-peening
KW  -AA7178-T6
KW  -plastic torque
KW  -elastic torque
KW  -torque predicted
AB  - In the current study, the effect of shot-peening on the static torsional strength of AA7178-T6 was
investigated. Time of shot-peening was adopted as a varied parameter to evaluate its effect on plastic state in
static torsion test of alloy. Residual stresses and surface roughness was measured to indicate the influence of
shot-peening time on alloy surface state. Torque predicted was calculated to evaluate the elastic torque and
plastic torque values according to shot-peening parameter. The results show that the shear strain decreases
whenever shot-peening time increase especially when up to 30 min that shear strain reduced by 45% and plastic
torque predicted also decreased at this time by 10% compare to its values of specimen without peened which
means that the strength of alloy improved with this process while shear stress decreased by 3.84% at this
condition. The total torque predicted was closed to experimental torque with average variation 14%.
Experimental torque decreased by 3.84% with the increasing of shot-peening time.
ER  -