The effect of surface laser alloying on the structure and the mechanical properties of steel 40KhN

1989 ◽  
Vol 31 (10) ◽  
pp. 724-727
Author(s):  
I. V. Artamonova ◽  
A. A. Nikitin ◽  
I. A. Ryzhkov
Keyword(s):  
Mechanical Properties ◽  
Laser Alloying ◽  
Surface Laser ◽  
Steel 40Khn ◽  
Effect Of Surface

Effect of Surface Penetrating Sealer on the Microstructure Properties of Cement-Based Composites

2013 ◽  
Vol 651 ◽  
pp. 245-250
Author(s):  
Tasi Lung Weng ◽  
Wei Ting Lin
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Concrete Durability ◽  
Test Results ◽  
Chloride Permeability ◽  
Durability Test ◽  
Chloride Resistance ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Effect Of Surface

The effect of penetrating sealer on the structure of surface pore, mechanical properties, and durability of cement-based composites was studied. Concrete specimens with various water/cement ratios (w/c=0.35, 0.45, 0.55) were cast and treated surfaced with various amounts of penetrating sealer at different ages. The effect of penetrating sealer on the mechanical properties of concrete was assessed by compressive strength. And, the rapid chloride permeability was also explored to test concrete durability. Test results indicate that the application of penetrating sealer significantly improves concrete compressive strength and chloride resistance. By using scanning electron microscopes observation, the penetrating depth of penetrating sealer can be determined and is about 2 cm. The penetrating sealer in this study may be categorized as deep penetrating sealer.

Atomic-scale investigation of the effect of surface carbon coatings on the oxidation and mechanical properties of iron nanowires

2021 ◽  
Author(s):  
Gurcan Aral ◽  
Md Mahbubul Islam
Keyword(s):  
Mechanical Properties ◽  
Oxidation Process ◽  
Atomic Scale ◽  
Carbon Coatings ◽  
Surface Carbon ◽  
Iron Nanowires ◽  
Effect Of Surface

The understanding of the complex atomistic-scale mechanisms of the oxidation process of carbon (C) coated iron nanowires (Fe NW) and also the resulting modulation of mechanical properties is a highly challenging task.

scholarly journals Experimental Investigation into the Effect of Surface Roughness and Mechanical Properties of 3D-Printed Titanium Ti-64 ELI after Heat Treatment

2021 ◽  
Author(s):  
Lebogang Lebea ◽  
Harry M Ngwangwa ◽  
Dawood Desai ◽  
Fuluphelo Nemavhola
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Dental Implants ◽  
Dental Implant ◽  
Complex Geometry ◽  
Poor Performance ◽  
Vital Role ◽  
Ultimate Tensile Stress ◽  
3D Printed ◽  
Effect Of Surface

The initial stability after implantology is paramount to the survival of the dental implant and the surface roughness of the implant plays a vital role in this regard. The characterisation of surface topography is a complicated branch of metrology, with a huge range of parameters available. Each parameter contributes significantly towards the survival and mechanical properties of 3D-printed specimens. The purpose of this paper is to experimentally investigate the effect of surface roughness of 3D-printed dental implants and 3D-printed dogbone tensile samples under areal height (Ra) parameters, amplitude parameters (average of ordinates), skewness (Rsk) parameters and mechanical properties. During the experiment, roughness values were analysed and the results showed that the skewness parameter demonstrated a minimum value of 0.596%. The 3D-printed dental implant recorded Ra with a 3.4 mm diameter at 43.23% and the 3D-printed dental implant with a 4.3 mm diameter at 26.18%. Samples with a complex geometry exhibited a higher roughness surface, which was the greatest difficulty of additive manufacturing when evaluating surface finish. The results show that when the ultimate tensile stress (UTS) decreases from 968.35 MPa to 955.25 MPa, Ra increases by 1.4% and when UTS increases to 961.18 MPa, Ra increases by 0.6%. When the cycle decreases from 262142 to 137433, Ra shows that less than a 90.74% increase in cycle is obtained. For 3D-printed dental implants, the higher the surface roughness, the lower the mechanical properties, ultimately leading to decreased implant life and poor performance.

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