A new approach to improve the surface properties of H13 steel for metal forming applications by applying the TiAlN multi-layer coating

2018 ◽  
Vol 32 ◽  
pp. 873-877 ◽  
Author(s):  
H. Elmkhah ◽  
F. Mahboubi ◽  
A. Abdollah-zadeh ◽  
A.R. Sabour Rouhaghdam
Keyword(s):  
Surface Properties ◽  
Metal Forming ◽  
H13 Steel ◽  
New Approach ◽  
Layer Coating

Nitric Oxide Releasing Coronary Stent: A New Approach Using Layer-by-Layer Coating and Liposomal Encapsulation

Small ◽  
2016 ◽  
Vol 12 (43) ◽  
pp. 6012-6023 ◽  
Author(s):  
Mahmoud A. Elnaggar ◽  
Seong Ho Seo ◽  
Samy Gobaa ◽  
Kyung Seob Lim ◽  
In-Ho Bae ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Coronary Stent ◽  
Layer By Layer ◽  
New Approach ◽  
Nitric Oxide Releasing ◽  
Layer Coating

scholarly journals A New Approach for the Modification of Paper Surface Properties Using Polyoxometalates

Materials ◽  
2010 ◽  
Vol 3 (1) ◽  
pp. 201-215 ◽  
Author(s):  
Mikhail Saraiva ◽  
José A. Gamelas ◽  
António Mendes de Sousa ◽  
Bruno Reis ◽  
José Amaral ◽  
...  
Keyword(s):  
Surface Properties ◽  
New Approach ◽  
Paper Surface

Influence of surface properties on bioactivity and pull-out torque in cold thread rolled Ti rod—Development of bioactive metal-forming technology

CIRP Annals ◽  
2012 ◽  
Vol 61 (1) ◽  
pp. 579-582 ◽  
Author(s):  
Y. Yoshida ◽  
K. Kuroda ◽  
R. Ichino ◽  
N. Hayashi ◽  
N. Ogihara ◽  
...  
Keyword(s):  
Surface Properties ◽  
Metal Forming ◽  
Pull Out ◽  
Forming Technology

scholarly journals The Evaluation of Runway Surface Properties: A New Approach

2012 ◽  
Vol 53 ◽  
pp. 1192-1201 ◽  
Author(s):  
Mauro D’Apuzzo ◽  
Bruna Festa ◽  
Giovanni Giuliana ◽  
Laura Mancini ◽  
Vittorio Nicolosi
Keyword(s):  
Surface Properties ◽  
New Approach

A study on the Surface Properties of Nitrogen Implanted H13 Steel by Plasma Immersion Ion Implantation

2006 ◽  
Vol 118 ◽  
pp. 275-280
Author(s):  
Y.Z. You ◽  
D.I. Kim ◽  
H.G. Chun
Keyword(s):  
Surface Roughness ◽  
Ion Implantation ◽  
Surface Properties ◽  
Photoelectron Spectroscopy ◽  
Surface Hardness ◽  
Wear Loss ◽  
Wear Property ◽  
H13 Steel ◽  
Near Surface ◽  
Plasma Immersion Ion Implantation

The near surface of the H13 steel was implanted by using Plasma immersion ion implantation (PIII) system at constant bias voltage of −20 kV with varying nitrogen (N+ ) ion dose (3, 6, 9, 12, 15×1017 ions/cm2 ). The surface properties of the N+ ion implanted steel were investigated by measuring the microhardness, wear loss and friction coefficient. As increasing N+ ion dose (12×1017 ions/cm2), both wear property and surface hardness were increased. However, these properties were decreased as the incident ion dose increased over 12×1017 ions/cm2. The elemental depth profile and surface roughness were obtained with X-ray photoelectron spectroscopy (XPS) and surface roughness tester, respectively.

A New Approach for Void Closure in Bulk Metal Forming

2016 ◽  
Vol 716 ◽  
pp. 595-604 ◽  
Author(s):  
Kai Kittner ◽  
Janine Wiesner ◽  
Rudolf Kawalla
Keyword(s):  
Metal Forming ◽  
Industrial Process ◽  
Tool Geometry ◽  
Fractal Surface ◽  
New Approach ◽  
Void Closure ◽  
The Real ◽  
Real Process ◽  
Open Die Forging ◽  
Final Closure

At present, the discussion about pores/ voids in large ingots is still actual. Researchers investigated the closing behavior during the open die forging process. Mostly, the approaches take the account into void closure with artificial pores. But artificial pores do not reflect the real closing behavior. This is caused in the surface/ structure of inner voids. During drilling and heating, the voids got a smooth surface and have contact to the atmosphere. Therefore, the material oxidizes on surface and the closing behavior is not similar to the real process. Real pores show a fractal surface with dendrites. And the inner of voids contains a vaccum. In the framework of a new approach, for void closure cast ingots with pores were generated and the structure and the closing behavior were investigated.The final goal is to find out a global closing function “Z”. This closing function should improve the understanding of void behavior and in the future the industrial process. The function depends on different parameters, like yield strength of material (Pkf), the pore size (AEq), the pore structure (Pstruct) and process parameters (Pproc), such as tool geometry or bite ratio. Finally, there is a parameter Pdisturb. This parameter works against the final closure and is important for the understanding of the process, because it represents the influence of dendrites. Furthermore the closing behavior is not comprehensible without the consideration of recrystallization.

A new approach to determine the wear coefficient for wear prediction of sheet metal forming tools

2007 ◽  
Vol 1 (4) ◽  
pp. 357-363 ◽  
Author(s):  
H. Hoffmann ◽  
G. Nürnberg ◽  
K. Ersoy-Nürnberg ◽  
G. Herrmann
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Wear Coefficient ◽  
Wear Prediction ◽  
New Approach ◽  
Forming Tools
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