Laser shock peening of AISI 304 stainless steel for the application to seawater desalination pump components

2011 ◽  
Vol 33 (1-3) ◽  
pp. 255-260 ◽  
Author(s):  
Hyuntaeck Lim ◽  
Myunghwa Lee ◽  
Pilkyu Kim ◽  
Sungho Jeong
Keyword(s):  
Stainless Steel ◽  
Laser Shock Peening ◽  
304 Stainless Steel ◽  
Laser Shock ◽  
Seawater Desalination ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Shock Peening

Surface Morphology and Deformation Mechanism of 304 Stainless Steel Treated by Laser Shock Peening

2013 ◽  
Vol 40 (1) ◽  
pp. 0103004
Author(s):  
柳沅汛 Liu Yuanxun ◽  
王曦 Wang Xi ◽  
吴先前 Wu Xianqian ◽  
黄晨光 Huang Chenguang
Keyword(s):  
Stainless Steel ◽  
Surface Morphology ◽  
Deformation Mechanism ◽  
Laser Shock Peening ◽  
304 Stainless Steel ◽  
Laser Shock ◽  
Shock Peening

Material Influence on Mitigation of Stress Corrosion Cracking Via Laser Shock Peening

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Grant Brandal ◽  
Y. Lawrence Yao
Keyword(s):  
Stainless Steel ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength Steel ◽  
High Strength ◽  
Corrosion Cracking ◽  
Laser Shock Peening ◽  
304 Stainless Steel ◽  
Laser Shock ◽  
Shock Peening

Stress corrosion cracking is a phenomenon that can lead to sudden failure of metallic components. Here, we use laser shock peening (LSP) as a surface treatment for mitigation of stress corrosion cracking (SCC), and explore how the material differences of 304 stainless steel, 4140 high strength steel, and 260 brass affect their mitigation. Cathodic charging of the samples in 1 M sulfuric acid was performed to accelerate hydrogen uptake. Nontreated stainless steel samples underwent hardness increases of 28%, but LSP treated samples only increased in the range of 0–8%, indicative that LSP keeps hydrogen from permeating into the metal. Similarly for the high strength steel, LSP treating limited the hardness changes from hydrogen to less than 5%. Mechanical U-bends subjected to Mattsson's solution, NaCl, and MgCl2 environments are analyzed, to determine changes in fracture morphology. LSP treating increased the time to failure by 65% for the stainless steel, and by 40% for the high strength steel. LSP treating of the brass showed no improvement in U-bend tests. Surface chemical effects are addressed via Kelvin Probe Force Microscopy, and a finite element model comparing induced stresses is developed. Detection of any deformation induced martensite phases, which may be detrimental, is performed using X-ray diffraction. We find LSP to be beneficial for stainless and high strength steels but does not improve brass's SCC resistance. With our analysis methods, we provide a description accounting for differences between the materials, and subsequently highlight important processing considerations for implementation of the process.

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