Tailoring of residual stresses by specific use of defined prestress during laser shock peening
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In: Journal of Materials Processing Technology, Vol. 295, 117154, 01.09.2021.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Tailoring of residual stresses by specific use of defined prestress during laser shock peening
AU - Schwab, Karl Christian
AU - Keller, Sören
AU - Kashaev, Nikolai
AU - Klusemann, Benjamin
N1 - Publisher Copyright: © 2021 The Authors
PY - 2021/9/1
Y1 - 2021/9/1
N2 - The aim of the present study is to tailor laser shock peening-induced residual stresses by applying defined prestress. For this purpose, elastic prestress is introduced during laser shock peening application and subsequently released. The influence of prestress on the resulting residual stresses is investigated experimentally by a four-point bending device that allows prestressing of the specimen during laser shock peening. Furthermore, a semi-analytical model of laser shock peening, extended by a contribution accounting for the prestress, is used to determine the prestress—residual stress relationship. A linear relation between prestress and compressive residual stress is found when the resulting compressive residual stresses are in the range of 20 % – 100 % of the yield strength. Generally, tensile prestress leads to a higher magnitude and penetration depth of resulting compressive residual stress after laser shock peening. As a proof of concept, prestress was used to alter a non-equibiaxial residual stress profile into an equibiaxial one, demonstrating the applicability of prestress as an effective tool for residual stress design.
AB - The aim of the present study is to tailor laser shock peening-induced residual stresses by applying defined prestress. For this purpose, elastic prestress is introduced during laser shock peening application and subsequently released. The influence of prestress on the resulting residual stresses is investigated experimentally by a four-point bending device that allows prestressing of the specimen during laser shock peening. Furthermore, a semi-analytical model of laser shock peening, extended by a contribution accounting for the prestress, is used to determine the prestress—residual stress relationship. A linear relation between prestress and compressive residual stress is found when the resulting compressive residual stresses are in the range of 20 % – 100 % of the yield strength. Generally, tensile prestress leads to a higher magnitude and penetration depth of resulting compressive residual stress after laser shock peening. As a proof of concept, prestress was used to alter a non-equibiaxial residual stress profile into an equibiaxial one, demonstrating the applicability of prestress as an effective tool for residual stress design.
KW - Aluminium alloy
KW - Laser shock peening
KW - Mechanical tensioning
KW - Residual stress
KW - Semi-analytical model
KW - Tailoring residual stress
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85104641709&partnerID=8YFLogxK
U2 - 10.1016/j.jmatprotec.2021.117154
DO - 10.1016/j.jmatprotec.2021.117154
M3 - Journal articles
AN - SCOPUS:85104641709
VL - 295
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
SN - 0924-0136
M1 - 117154
ER -