Application of design of experiments for laser shock peening process optimization
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In: The International Journal of Advanced Manufacturing Technology, Vol. 102, No. 5-8, 19.06.2019, p. 1567-1581.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Application of design of experiments for laser shock peening process optimization
AU - Chupakhin, Sergey
AU - Klusemann, Benjamin
AU - Huber, Norbert
AU - Kashaev, Nikolai
PY - 2019/6/19
Y1 - 2019/6/19
N2 - Laser shock peening—a very promising life enhancement technique—has demonstrated great success regarding the improvement of fatigue behavior via deep compressive residual stresses. However, the prediction and adaption of residual stress fields on basis of the laser peening parameters are still not comprehensively established. The aim of the current work is to investigate the effects of the laser pulse energy, the number of treatment overlaps as well as the laser spot size on the resulting residual stress distribution, characterized by following quantities: the residual stress close to the surface, the maximum compressive residual stress, and the integral compressive stress area over the specimen depth. For a systematic investigation of all main and interaction-based process parameter effects, and a subsequent parameter optimization, the general full factorial design is employed. The results show that laser shock peening with different process parameter combinations, inducing residual stresses with comparable integral stress area, can lead to a minimum fatigue life extension of approx. 100,000 cycles, representing a minimum fatigue life of 250% of the base material. The experimental scatter in the number of cycles to failure follows the Weibull distribution which qualitatively correlates with the standard deviation of the integral stress area.
AB - Laser shock peening—a very promising life enhancement technique—has demonstrated great success regarding the improvement of fatigue behavior via deep compressive residual stresses. However, the prediction and adaption of residual stress fields on basis of the laser peening parameters are still not comprehensively established. The aim of the current work is to investigate the effects of the laser pulse energy, the number of treatment overlaps as well as the laser spot size on the resulting residual stress distribution, characterized by following quantities: the residual stress close to the surface, the maximum compressive residual stress, and the integral compressive stress area over the specimen depth. For a systematic investigation of all main and interaction-based process parameter effects, and a subsequent parameter optimization, the general full factorial design is employed. The results show that laser shock peening with different process parameter combinations, inducing residual stresses with comparable integral stress area, can lead to a minimum fatigue life extension of approx. 100,000 cycles, representing a minimum fatigue life of 250% of the base material. The experimental scatter in the number of cycles to failure follows the Weibull distribution which qualitatively correlates with the standard deviation of the integral stress area.
KW - Engineering
KW - Laser-Shock-Peening
KW - Laser shock peening
KW - Design of experiments
KW - Fatigue crack growth
KW - Residual stress
KW - Hole drilling
KW - Design of experiments
KW - Fatigue crack growth
KW - Hole drilling
KW - Laser shock peening
KW - Residual stress
UR - http://www.scopus.com/inward/record.url?scp=85059837899&partnerID=8YFLogxK
U2 - 10.1007/s00170-018-3034-2
DO - 10.1007/s00170-018-3034-2
M3 - Journal articles
VL - 102
SP - 1567
EP - 1581
JO - The International Journal of Advanced Manufacturing Technology
JF - The International Journal of Advanced Manufacturing Technology
SN - 0268-3768
IS - 5-8
ER -