Open AccessComparison of advanced techniques for mechanical surface treatment of stainless steel parts
Author(s) -
Dmytro Lesyk,
S. Soiama,
B.N. Mordyuk,
Vitaliy Dzhemelinskyi,
Aitzol Lamíkiz
Publication year - 2021
Publication title -
progresivna tehnìka, tehnologìâ ta ìnženerna osvìta
Language(s) - English
Resource type - Journals
ISSN - 2409-7160
DOI - 10.20535/2409-7160.2021.xxii.240462
Subject(s) - peening , materials science , residual stress , laser peening , surface roughness , shot peening , austenitic stainless steel , metallurgy , hardness , work hardening , indentation hardness , composite material , cavitation , surface layer , corrosion , layer (electronics) , microstructure , physics , mechanics
This work compares various mechanical surface treatment techniques applied to improve the properties of the AISI 304 austenitic stainless steel. Effects of laser shock peening (LSP), water jet cavitation peening (WjCP), water jet shot peening (WjSP), and ultrasonic impact treatment (UIT) on surface roughness, hardness, and residual stress were studied. The results demonstrate that as compared to the untreated specimen (Ra = 3.06 μm), all strain hardening methods demonstrate the decreased surface roughness parameters. The smallest Ra parameter of the wavy regular surface microrelief is formed after the ultrasonic treatment. The surface hardness (22.1 HRC5) was respectively increased by 30.7%, 38.4%, 69.6%, and 73.2% after the LSP, WjCP, WjSP, and UIT treatments. All peening techniques induced compressive residual stresses (ranged from –377 MPa to –693 MPa) in the near-surface layer. It is assumed that used treatments can increase wear/corrosion resistance and fatigue life in the studied steel.