Fatigue life enhancement of additive manufactured 316l stainless steel by LSP using a DPSS laser system

0558979 - FZÚ 2023 RIV GB eng J - Článek v odborném periodiku
Zulic, Sanin - Rostohar, Danijela - Kaufman, Jan - Pathak, Sunil - Kopeček, Jaromír - Böhm, Marek - Brajer, Jan - Mocek, Tomáš
Fatigue life enhancement of additive manufactured 316l stainless steel by LSP using a DPSS laser system.
Surface Engineering. Roč. 38, č. 2 (2022), s. 183-190. ISSN 0267-0844. E-ISSN 1743-2944
Grant CEP: GA MŠMT EF15_006/0000674; GA MŠMT(CZ) EF20_079/0017754
GRANT EU: European Commission(XE) 739573 - HiLASE CoE
Grant ostatní: OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674; OP VVV - MSCA-IF IV FZU(XE) CZ.02.2.69/0.0/0.0/20_079/0017754
Institucionální podpora: RVO:68378271
Klíčová slova: laser shock peening * residual stress * fatigue * DPSS * additive manufacturing * SLM * SEM * EBSD
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.8, rok: 2022
Způsob publikování: Open access

Present work aims to study the fatigue life behaviour of additively manufactured (AM) stainless steel 316L in a laser shock peening (LSP) process. The fatigue behaviour of as-built samples and LSPeened sample were studied on the AM samples. A new diode-pumped laser system was utilized as an instrument to perform LSP operations. LSP operation was performed under two different sacrificial layers of different materials i.e. vinyl tape and aluminium tape. The other essential LSP parameters, namely energy, pulse width, spot size, overlap, and number of layers were kept constant based on the previous experimental findings. The characterization was done for analyzing the residual stresses using a hole drilling process, and a 4-point bending machine. A considerable improvement in compressive residual stress and fatigue life was observed in the LSPeened samples. Such improvements in residual stresses and fatigue life may pave a road to establishing diode-pumped lasers for LSP applications.
Trvalý link: https://hdl.handle.net/11104/0333053