Rivets, solid, 100° normal countersunk head with dome, metallic material, with or without surface treatment. Dimensions

2015 ◽  
Keyword(s):  
Surface Treatment ◽  
Metallic Material

scholarly journals Effect of surface compressive residual stress introduced by surface treatment on fatigue properties of metallic material

2018 ◽  
Vol 165 ◽  
pp. 18006
Author(s):  
Jinta Arakawa ◽  
Tatsuya Hanaki ◽  
Yoshiichirou Hayashi ◽  
Hiroyuki Akebono ◽  
Atsushi Sugeta
Keyword(s):  
Residual Stress ◽  
Surface Treatment ◽  
Fatigue Limit ◽  
Compressive Residual Stress ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Mean Stress ◽  
Metallic Material ◽  
Effect Of Surface

This study considers shakedown in evaluating the fatigue limit of metals with compressive residual stress at the surface. We begin by applying tension-compression fatigue tests to ASTM CA6NM under conditions of controlled load and displacement to obtain fatigue limit diagram in compressive mean stress. The results imply that shakedown occurs under the condition of controlled displacement, therefore, shakedown should be considered when evaluating the fatigue limit of metals with compressive residual stress at the surface.

scholarly journals Laser Cavitation Peening and Its Application for Improving the Fatigue Strength of Welded Parts

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 531
Author(s):  
Hitoshi Soyama
Keyword(s):  
Laser Ablation ◽  
Fatigue Strength ◽  
Surface Treatment ◽  
Polyvinylidene Fluoride ◽  
High Speed ◽  
Metallic Material ◽  
Mechanical Surface Treatment ◽  
Steel Welds ◽  
The Impact ◽  
Mechanical Surface

During conventional submerged laser peening, the impact force induced by laser ablation is used to produce local plastic deformation pits to enhance metallic material properties, such as fatigue performance. However, a bubble, which behaves like a cavitation, is generated after laser ablation, known as “laser cavitation.” On the contrary, in conventional cavitation peening, cavitation is generated by injecting a high-speed water jet into the water, and the impacts of cavitation collapses are utilized for mechanical surface treatment. In the present paper, a mechanical surface treatment mechanism using laser cavitation impact, i.e., “laser cavitation peening,” was investigated, and an improvement in fatigue strength from laser cavitation peening was demonstrated. The impact forces induced by laser ablation and laser cavitation collapse were evaluated with a polyvinylidene fluoride (PVDF) sensor and a submerged shockwave sensor, and the diameter of the laser cavitation was measured by observing a high-speed video taken with a camera. It was revealed that the impact of laser cavitation collapse was larger than that of laser ablation, and the peening effect was closely related to the volume of laser cavitation. Laser cavitation peening improved the fatigue strength of stainless-steel welds.

Surface treatment with silver particles isles on Titanium cp: study of antimicrobial activity

2020 ◽  
Vol 9 (4) ◽  
pp. e27942662
Author(s):  
Patrícia Capellato ◽  
Cláudia Eliana Bruno Marino ◽  
Gilbert Silva ◽  
Lucas Victor Benjamim Vasconcelos ◽  
Rodrigo Perito Cardoso ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Surface Treatment ◽  
Titanium Surface ◽  
Silver Clusters ◽  
Silver Particles ◽  
Silver Deposition ◽  
Dispersed Particles ◽  
Significant Difference ◽  
Diffusion Assay ◽  
Antibacterial Potential

During the last decades, researchers have been growing the interest in surface treatment with an antimicrobial agent. Silver nanoparticles (AgNPs) are widely used in biomedical fields due to their potent antimicrobial activity. So, in this study was investigated silver particles (isles) coated on titanium surface for dental and orthopedic application. Silver particles coating process on titanium surface were performed via sputtering that is a plasma-assisted deposition technique with and titanium without treatment was applied as comparing standard. Plasma treatment parameters were optimized so that the result was not a thin film of Ag but dispersed particles of Ag on the Ti-cp surface. The alloy surfaces were investigated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to investigate antibacterial potential Staphylococcus aureus and Escherichia coli have been used at Agar diffusion assay. The results were analyzed by analysis of variance (ANOVA) in order to verify significant difference antimicrobial activity between samples that have shown no difference between the surfaces studied treatments. For silver deposition scattered particles (isles) over titanium surface for a 10-minute treatment, EDS revealed by silver clusters that the particles were not properly scattered onto surface, hence, the low effectiveness in antibacterial activity.

Effect of Plasma Surface Treatment on Surface Energy and Adhesion Properties for Cr Coating on Substrates

2013 ◽  
Vol 51 (10) ◽  
pp. 735-741
Author(s):  
Dong-Yong Kim ◽  
Eun-Wook Jeong ◽  
Kwun Nam Hui ◽  
Youngson Choe ◽  
Jung-Ho Han ◽  
...  
Keyword(s):  
Surface Energy ◽  
Surface Treatment ◽  
Adhesion Properties ◽  
Plasma Surface ◽  
Plasma Surface Treatment ◽  
Cr Coating

Experimental Study on Plasma Surface Treatment of Capacitors Film

2008 ◽  
Vol 128 (5) ◽  
pp. 339-342
Author(s):  
Dai Ling ◽  
Yin Ting ◽  
Lin Fuchang ◽  
Yan Fei
Keyword(s):  
Experimental Study ◽  
Surface Treatment ◽  
Plasma Surface ◽  
Plasma Surface Treatment
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