An Interferometric Examination of the Oxide/Metal Interface and the Coating Surface after Anodising an Aluminium Alloy with Differing Microstructures and Surface Finish. Part 2. Machined Surfaces, and some Effects of Post-Machining Finishing. / Eine interferometrische Untersuchung der Oxid/Metall-Grenzfläche und der Schichtoberfläche nach Eloxieren einer Aluminiumlegierung mit unterschiedlichem Gefüge und Oberflächenbehandlung Teil 2. Mechanisch behandelte Oberflächen und dadurch hervorgerufene Endbearbeitungseffekte

2000 ◽  
Vol 37 (6) ◽  
pp. 326-346
Author(s):  
P.J.E. Forsyth
Keyword(s):  
Aluminium Alloy ◽  
Surface Finish ◽  
Metal Interface ◽  
Coating Surface ◽  
Machined Surfaces

scholarly journals Biomechanical Performance of the Cemented Hip Stem with Different Surface Finish

2019 ◽  
Vol 9 (19) ◽  
pp. 4082 ◽  
Author(s):  
Jui-Pin Hung ◽  
Yu-Wei Bai ◽  
Chung-Qua Hung ◽  
Tsui-Er Lee
Keyword(s):  
Surface Finish ◽  
Cement Mantle ◽  
Mechanical Effect ◽  
Metal Interface ◽  
Hip Prostheses ◽  
Lower Survival Rate ◽  
Surface Finishes ◽  
Artificial Hip ◽  
Polished Metal

The integrity of the cemented fixation interface is responsible for the long-term longevity of artificial hip prostheses. Metallic stems with roughened surfaces are considered to provide stronger adhesion with cement. However, clinical studies have reported that roughened stems show a lower survival rate than polished stems. These studies clearly reveal that the causes of artificial stem loosening are very complicated and multifaceted. Therefore, this study was conducted to investigate the mechanical effect of stem surface finish in cemented hip replacement. To accomplish this, a series of cement–metal specimens were tested configurations to assess the mechanical characteristics of the cement–metal interface specimens. A finite elemental model of cemented femoral prostheses was then created, in which the cement–stem interface was assumed to be in different bonding states according to the experimentally measured interface properties. The failure probabilities of the cement mantle and cemented interface under physiological loadings were evaluated. Experimental results indicate that the polished metal produced higher interfacial tensile and lower shearing strengths than the roughened metal. The polished stems were predicted to induce a lower failure probability of cement mantle and higher integrity of the cement–stem interface when compared to the roughened stem. Overall, current results provide significant evidence to support the clinical outcomes of cemented hip prostheses with different stem surface finishes.

Influence of Power Supply Frequency on Microstructure and Properties of Micro-Arc Oxidation Coating on Aluminium Alloy

2013 ◽  
Vol 537 ◽  
pp. 76-81 ◽  
Author(s):  
Shi Gang Xin ◽  
Jun Le ◽  
Li Xin Song
Keyword(s):  
Aluminium Alloy ◽  
Current Pulse ◽  
Power Supply ◽  
Protective Property ◽  
Cell Voltage ◽  
Alumina Coatings ◽  
Current Frequency ◽  
Microstructure And Properties ◽  
Coating Surface ◽  
Micro Arc Oxidation

This paper studies the influence of current frequency on the micro-arc oxidation (MAO) process, microstructrue and the properties of the formed alumina coatings. The amount of discharge sparks increases and the spark moves more quickly with increasing the frequency of current pulse. SEM results show that the size of the discharge products decreases. The anodic cell voltage decreases with increasing the frequency of power supply, however, the cathodic cell voltage increases. The thickness and roughness of the coating produced using frequency of power supply 50 Hz are high. Increasing the frequency, the thickness of the coating decreases, but coating surface becomes even, and the coating possesses better corrosion protective property

scholarly journals Machining Parameter optimization by using Taguchi Technique for CNC turning of Grade T6 Aluminium alloy

2019 ◽  
Vol 9 (2) ◽  
pp. 2458-2461
Keyword(s):  
Surface Roughness ◽  
Aluminium Alloy ◽  
Parameter Optimization ◽  
Surface Finish ◽  
Cutting Speed ◽  
Process Parameter ◽  
Depth Of Cut ◽  
Taguchi Technique ◽  
Cnc Turning ◽  
Machining Parameter

With the increase in demand for producing products with good surface finish within reduced time. Selection of suitable parameters for machining in CNC lathe is much required from the operator’s point of view. To attain the desired parameters this study deals taguchi technique as a tool in process parameter optimization using carbon insert CNMG tool in turning of AA6063 alloy. L9 orthogonal array is selected for conducting the experiments and for this Feed, Cutting Speed, Depth of Cut are the process parameters. The ANOVA and S-N ratio is used to analyse the characteristic performance of the turning operation performed. From the results of ANOVA the most influential parameter in reducing the surface roughness is found as depth of cut. Finally for various process parameter combinations the surface roughness is calculated and the optimum parameter for machining is attained by using Taguchi. For authentication of the optimum output attained in optimization experiments have been conducted to get maximum surface finish when machining the aluminium alloy in CNC turning

scholarly journals A Critical Study on Computation of Cutting Forces in Metal Cutting

2021 ◽  
Vol 2070 (1) ◽  
pp. 012166
Author(s):  
Dillip Kumar Mohanta ◽  
Biswajyoti Pani ◽  
Bidyadhar Sahoo ◽  
A. M. Mohanty
Keyword(s):  
Statistical Model ◽  
High Precision ◽  
Surface Finish ◽  
Cutting Forces ◽  
Metal Cutting ◽  
Critical Study ◽  
Research Activity ◽  
Profound Impact ◽  
Experimental Values ◽  
Machined Surfaces

Abstract Tool behavior in metal cutting is inevitable since they are typically required to produce components with high precision. This would have a profound impact on efficiency and costs of machining. The cutting forces involved at chip tool interface and the surface finish of the machined surfaces are the two major facets to gauge the performance of tool. The prediction by a statistical model, and the experimental values recorded using various sensors especially dynamometers are different approaches to critically analyze the cutting forces. Many researchers use to extensively practice these methodologies for their research activity. The aim of current research is to critically analyze & summarize approaches i.e., experimental/predictive available for gauging the cutting forces with user suggestion.

scholarly journals Dynamic Generation of Machined Surfaces, Part 1: Description of a Random Excitation System

1991 ◽  
Vol 113 (2) ◽  
pp. 137-144 ◽  
Author(s):  
G. M. Zhang ◽  
S. G. Kapoor
Keyword(s):  
Surface Finish ◽  
Mathematical Formulation ◽  
Three Dimensional ◽  
Surface Profile ◽  
Random Excitation ◽  
Work Piece ◽  
Excitation System ◽  
Machining Conditions ◽  
Dynamic Generation ◽  
Machined Surfaces

With increasing emphasis on the adaptive control for the purpose of quality and productivity improvement, it becomes necessary to develop models which can correlate the surface finish parameters with the machining conditions as well as work-piece material characteristics. This paper presents a study that leads to the development of a model for the dynamic generation of three-dimensional texture of machined surfaces. In Part 1, the mathematical formulation of the random excitation system which is responsible for the random portion of a surface profile is developed. It is assumed that the random excitation system originates from the nonhomogeneous distribution of microhardness of workpiece material. Machining tests are also performed to verify the validity of such a model development. In Part 2, a procedure for the construction of three-dimensional topography will be developed and the relationship between the machining conditions and the surface finish parameters will be established.

Some experiments on measuring the surface finish of plastic machined surfaces

1982 ◽  
Vol 1 (12) ◽  
pp. 525-528
Author(s):  
R. J. Crawford ◽  
B. K. Hinds ◽  
C. P. O'Donnell ◽  
K. Siew
Keyword(s):  
Surface Finish ◽  
Machined Surfaces
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