scholarly journals An Investigation on Surface Roughness and Tool Wear in Turning Operation of Inconel 718

2019 ◽  
Author(s):  
Selim Gürgen ◽  
Dinçer Tali ◽  
Melih Cemal Kushan
Keyword(s):  
Surface Roughness ◽  
Vapor Deposition ◽  
Inconel 718 ◽  
Physical Vapor Deposition ◽  
Wear Behavior ◽  
Experimental Parameter ◽  
Coating Materials ◽  
Medium Temperature ◽  
Turning Operation ◽  
Coating Methods

This paper investigates the influences of three different input parameters, such as feed rate, insert nose radius, and insert coating methods, in the turning operation of Inconel 718. The coating methods were selected as medium temperature chemical vapor deposition (MT-CVD) and physical vapor deposition (PVD) and in addition to coating methods, the role of various coating materials was discussed since the inserts were coated with multi-layers of TiCN/Al2O3/TiN and single-layer of TiAlN on carbide substrates. The results were discussed in terms of wear behavior of cutting tools and surface quality of the workpiece, which is indicated by surface roughness. A full factorial experimental design was employed in the present work and the results were evaluated using main effects plots. Furthermore, the analysis of variance (ANOVA) method was applied to specify both reactive and non-reactive effects of experimental parameter reactions. The results showed that surface roughness is reduced using low feed rates and large nosed inserts in the operations. Furthermore, TiAlN-coated inserts with PVD method provided better surface finish than with MT-CVD method. It was also found that surface roughness increases as the wear rate of inserts increases.

Wear of Physical Vapor Deposition TiN Coatings Sliding Against Cr-Steel and WC Counterbodies

1998 ◽  
Vol 120 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Kee-Rong Wu ◽  
Raymond G. Bayer ◽  
Peter A. Engel ◽  
D. C. Sun
Keyword(s):  
Wear Resistance ◽  
Coating Thickness ◽  
Vapor Deposition ◽  
Deposition Temperature ◽  
Physical Vapor Deposition ◽  
Wear Behavior ◽  
Chromium Steel ◽  
Wear Volume ◽  
Tin Coatings ◽  
Auger Microscopy

Cutting tools are often coated with titanium nitride (TiN) for its good wear resistance. The method of coating by physical vapor deposition (PVD) has many superior features over other methods of deposition. Among the parameters affecting the wear resistance of PVD TiN coatings, the most crucial ones are the deposition temperature and the coating thickness. This paper presents an experimental investigation of the wear characteristics of PVD TiN coatings produced at two deposition temperatures (around 220°C and 371°C) and for a range of coating thicknesses (0.48 μm to 3.25 μm). A ball-on-flat configuration was used in the study. The flat specimen, made of M2 tool steel coated with TiN, was slid against a 52100 chromium steel (Cr-steel) or a tungsten carbide (WC) ball, dry. These two counterbody materials were chosen because of their different properties. The wear volume was measured and wear scar examined with a 3-D optical profilometer. The worn surfaces and debris were analyzed with scanning Auger microscopy (SAM) and an electron probe microanalyzer (EPMA). Quantitative data were obtained for the wear volume and coefficient of friction (COF) as functions of the sliding cycles. In the case of TiN versus Cr-steel, the presence of transferred wear debris on the flattened ball surface and iron oxide in the wear tracks of the coating surface was a major factor controlling the wear behavior. In the case of TiN versus WC, no transferred layers were observed; instead, the presence of flake type debris from the coating in the wear tracks appeared to be the controlling factor. It was concluded that deposition temperature, coating thickness, and counterface influenced wear behavior. For the lower deposition temperature, wear was significantly reduced by thinner coatings. However, for the higher deposition temperature, wear reduction was only obtained with the Cr-steel counterface.

Erosion Characterization of Coated Superalloys in Turbomachinery Applications

2002 ◽  
Author(s):  
Widen Tabakoff ◽  
Awatef Hamed
Keyword(s):  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
High Performance ◽  
Experimental Studies ◽  
Chemical Vapor ◽  
Coating Materials ◽  
Material Erosion ◽  
Spray Detonation ◽  
Turbine Design ◽  
The University

The ingestion of suspended particles by high performance turbomachinery reduces engine efficiency and life. New developments in blade coating materials have contributed to compressor and turbine design improvements. A knowledge of the important phenomna associated with material erosion by particulate flow is required in the design. This paper gives an overview of the experimental studies of the erosion characteristics of coated superalloy blades conducted at the University of Cincinnati’s test facilities for blade and coating materials erosion will be described. Results will be presented and discussed for the erosion characteristics of various blade materials and coatings. The investigated coatings are produced via plasma spray, detonation guns, chemical vapor deposition (CVD), and physical vapor deposition (PVD).

Evolution of TiN Coating Surface Roughness during Physical Vapor Deposition on High Speed Steel Substrate

2014 ◽  
Vol 604 ◽  
pp. 67-70
Author(s):  
Leonid Kupchenko ◽  
Rauno Tali ◽  
Eron Adoberg ◽  
Valdek Mikli ◽  
Vitali Podgursky
Keyword(s):  
Surface Roughness ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
High Speed ◽  
Steel Substrate ◽  
High Speed Steel ◽  
Growth Exponent ◽  
Force Microscopy ◽  
Tin Coatings ◽  
Atomic Force

TiN coatings with different thickness were prepared by arc ion plating (AIP) physical vapor deposition (PVD) on high speed steel (HSS) substrates. TiN coatings surface roughness was investigated by atomic force microscopy (AFM) and 3D optical profilometry and growth kinetics was described using scaling exponents β and α. The growth exponent β is 0.91-1.0 and the roughness exponent α is 0.77-0.81. Due to relatively high value of the exponent α, the surface diffusion is likely predominant smoothening mechanism of TiN growth.

Friction and Wear Behavior of a Physical Vapor Deposition Coating Studied Using a Micro-Scratch Technique

2021 ◽  
Vol 144 (2) ◽  
Author(s):  
Kaouther Khlifi ◽  
Hafedh Dhiflaoui ◽  
Chokri Ben Aissa ◽  
Najoua Barhoumi ◽  
Ahmed Ben Cheikh Larbi
Keyword(s):  
Friction Coefficient ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Scratch Test ◽  
Relevant Information ◽  
Morphological Properties ◽  
Wear Volume ◽  
Wear Coefficient

Abstract CrSiN coating was deposited by physical vapor deposition (PVD) magnetron sputtering on XC100 steel substrate. Microstructural and morphological properties were studied using scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and atomic force microscopy (AFM). Nanoindentation and scratching experiments were conducted to study the mechanical and adhesion behavior. Multi-pass scratch tests were conducted under different sliding conditions. Results showed that CrSiN coating has a dense and compact nanocomposite microstructure consisting of CrN nanocrystallites and SiN amorphous matrix. The CrSiN thin film exhibit hardness and Young's modulus of 30.52 ± 1.85 GPa and 338.32 ± 13.5 GPa, respectively. The H/E, H3/E2, and 1/HE2 ratios were also calculated (H/E ≈ 0.09, H3/E2 ≈ 0.024, and 1/HE2 ≈ 2.86 × 10−07) and used to predict and assess the elastic/plastic and wear resistance. Critical loads LC1, LC2, and LC3 obtained with scratch test, were, respectively, 11.5 ± 0.12, 16.6 ± 0.23, and 20 ± 0.35 N. Multi-pass scratch were analyzed and the friction coefficient (COF), the damage mechanism, and wear volume were determined. The use of an energetic approach allowed to determine the energetic wear coefficient. CrSiN coating revealed a low friction coefficient (around 0.1) and a low energetic wear coefficient (6.3 × 10−7 mm3/N.m). In addition, it was found that multi-pass scratch method has the potential to extract relevant information about wear behavior.

Wear Behavior of a Vitrified Bond CBN Wheel by Ultrasonic-Assisted Creep Feed Profile Grinding of Inconel 718

2011 ◽  
Vol 325 ◽  
pp. 122-127
Author(s):  
Taghi Tawakoli ◽  
Bahman Azarhoushang ◽  
Abdolreza Rasifard
Keyword(s):  
Surface Roughness ◽  
Inconel 718 ◽  
Wear Behavior ◽  
High Heat ◽  
Burr Formation ◽  
Grinding Forces ◽  
Profile Grinding ◽  
Creep Feed ◽  
Process Reliability ◽  
Ultrasonic Assisted

Generally in the grinding of modern aviation materials such as nickel-based superalloys, problems frequently occur in terms of burr formation, profile loss of the wheel, high heat generation in the contact zone, high grinding forces as well as low process reliability. A recent and promising method to overcome these technological constraints is the use of ultrasonic assistance, where high-frequency and low amplitude vibrations are superimposed on the movement of the workpiece. This paper presents the design of an ultrasonically vibrated block sonotrode and the experimental investigation of ultrasonically assisted profile grinding of Inconel 718. The profile wear, radial wear of the wheel, grinding forces and surface roughness by ultrasonic-assisted and conventional profile grinding were measured and compared. The obtained results show that the application of ultrasonic vibration can decrease the radial wear of the wheel, profile wear, grinding forces and surface roughness considerably.

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