Temat: machining - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Machining Investigations of Squeeze Cast TiB2/Al 7075 Composites through EDM: Regression Modelling and Weighted Principal Component Analysis
Autorzy:: Pradhan, Rahul Chandra
Das, Diptikanta
Sahoo, Barada Prasanna
Rout, Chiranjeeb
Panda, Akash
Barla, Evangelin
Powiązania:: https://bibliotekanauki.pl/articles/27324484.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: Al 7075
TiB2
metal matrix composite
electrical discharge machining
weighted principal component analysis
Opis:: 2 wt.% TiB2 (mean particle size: 400 nm) reinforced Al 7075 metal matrix composites (MMCs) fabricated through mechanical stirring and ultrasonic agitation integrated squeeze casting process were subjected to electrical discharge machining (EDM) after determining the physical and mechanical properties. EDM was conducted with Cu electrode tools to investigate influence of machining factors, i.e. peak current (IP), pulse on time (TON) and gap voltage (VG) on the tool wear rate (TWR), material removal rate (MRR) and average surface roughness (ASR) of the machined surfaces. All the three responses increased on increasing IP and TON, but reduced on increasing VG. The machined surfaces were studied through scanning electron microscope (SEM). Significance of the EDM parameters on the individual responses were studied using analysis of variance (ANOVA) and regression models for the responses were developed using response surface method (RSM). The responses under consideration were optimized simultaneously using Taguchi embedded weighted principal component analysis (WPCA), which resulted the parametric combination of 4A (current), 100 μs (pulse duration) and 75V (voltage) was the optimal setting for the multi-criteria decision problem. Finally, the result of optimization was validated by conducting some confirmatory experiments.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 2; 551--562
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessing Machinability and Surface Characteristics of a Shape Memory Alloy (SMA) Processed through Wire Electro Spark Erosion Method
Autorzy:: Ebenezer, George
Khan, Adam M.
Chellaganesh, Duraipandi
Winowlin Jappes, J. T.
Haider, Julfikar
Powiązania:: https://bibliotekanauki.pl/articles/2125539.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Wire Electro Spark Erosion
machining
NiTi alloy
surface roughness
material removal rate
MRR
Opis:: In this paper, a study was carried out to investigate the surface roughness and material removal rate of low carbon NiTi shape memory alloy (SMA) machined by Wire Electro Spark Erosion (WESE) technique. Experiments are designed considering three parameters viz, spark ON time (SON), spark OFF time (SOFF), and voltage (V) at three levels each. The surface roughness increased from 2.1686 μm to 2.6869 μm with an increase in both SON time, SOFF time and a decrease in voltage. The material removal rate increased from 1.272 mm3/min to 1.616 mm3/min with an increase in SON time but a varying effect was observed the SOFF time and voltage were varied. The analysis revealed that the intensity and duration of the spark had an unswerving relation with the concentration of the microcracks and micropores. More microcracks and micropores were seen in the combination of SON = 120 μs, voltage = 30 V. The concentration of the microcracks and micropores could be minimised by using an appropriate parameter setting. Therefore, considering the surface analysis and material removal, the low carbon NiTi alloy is recommended to machine with 110 μs - 55 μs - 30 V (SON - SOFF - V respectively), to achieve better surface roughness with minimal surface damage.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 921--930
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of Machining Process Parameters and Number of Pass on Compaction Behaviour of Commercially Pure Aluminium Chips Consolidated by Equal Channel Angular Pressing (ECAP) Using Response Surface Methodology
Autorzy:: Palanivel, Ramaswamy
Vigneshwaran, S.
Alshqirate, Abedalrzaq
Madhavan, R.
Venkatachalam, P.
Laubscher, R. F.
Powiązania:: https://bibliotekanauki.pl/articles/2048762.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ECAP
response surface methodology
relative density
machining
hardness
chip consolidation
Opis:: This work investigates the compaction behaviour of commercial pure aluminium chips (CP Al) produced during a machining operation and subsequently consolidated by Equal Channel Angular Pressing (ECAP). Empirical models were developed to describe the relative density and hardness of the compacted product of ECAP as functions of the initial machining input parameters including cutting edge angle (CA), depth of cut (DOC) and then the number of consolidation pass during ECAP. The models were developed utilizing response surface methodology (RSM) based on data from a central composite face centred factorial design of experiments approach. The models were then validated by using Analysis of Variance (ANOVA). The effect of input parameters on the relative density and hardness of the ECAP consolidated samples are presented and discussed including details as regards to the mechanical and microstructural properties. An optimum set of input parameters are identified and presented where the best relative density and hardness are demonstrated.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 1; 357-370
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Experimental Investigations of Tool Wear in Vibration-Assisted Turning of Inconel 718
Autorzy:: Dodla, Srihari
Powiązania:: https://bibliotekanauki.pl/articles/2125542.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Inconel 718
ultrasonic assisted turning
dry machining
deviation
cutting forces
temperature
Opis:: In the current paper, the effect of tool wear for a constant period of time (360 s) during conventional and ultrasonic assisted machining of Inconel 718 is investigated in terms of cutting forces, temperature, and deviation measurements. For fixed process parameters turning experiments have been performed with and without the application of tangential vibration. Ultrasonic assisted turning (UAT) experiments have been compared with conventional turning (CT). The experimental results reveal that cutting forces and temperature increase linearly in the case of UAT whereas remaining constant in CT for a constant period of time. Besides the tool wear rate in the case of UAT is more than that in the CT.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 949--953
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Surface Integrity Evaluation on Aluminium-Epoxy Composite in Machining using Taguchi Method
Autorzy:: Leong, Kean Wei
Shayful, Zamree Abd Rahim
Fathullah, M.
Omar, Mohd Firdaus
Mohd Mustafa Al Bakri, Abdullah
Radhwan, Husin
Mazlan, Amirul Haziq
Jeż, Bartłomiej
Nabiałek, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/2048837.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hybrid mold
metal epoxy composite
MEC
machining
injection molding process
Opis:: The increasing needs of using aluminum epoxy composite as a replacement to solid metal rapid prototyping has opened to interests in optimizing its machining processes. This paper reported on the success of optimizing the surface roughness of aluminium epoxy composite using milling process along with a new finding on the best combination parameters. Taguchi method was used as the optimization method whereas spindle speed, feed rate, and depth of cut were set as input factors using an L9 Orthogonal Array. Analysis of Variance was used to identify the significant factors influencing the surface roughness. Experiment was conducted in dry condition using a vertical milling machine and the surface roughness after the machining was evaluated. Optimum combination of cutting parameters was identified after the finest surface roughness (response) based on the signal-to-noise ratio calculated. Cutting parameters selected after preliminary testing are cutting speeds of (2000, 3000 and 4000) rpm, feed rate (300, 400 and 500) mm/min, and cutting depth (0.15, 0.20, and 0.25) mm. The result showed that cutting speed had the largest percentage contribution to surface roughness with 69% and the second highest contribution was feed rate with 22% and depth of cut at 9%. The spindle speed was found as the most significant factor influencing the quality of surface roughness. The result is significant particularly in providing important guidelines for industries in selecting the right combination of parameters as well as to be cautious with the most significant factor affecting the milling process of metal epoxy composite.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 1; 233-239
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: An influence of Titanium Alloy Ti10V2Fe3Al Microstructure on the Electrodischarge Process Efficiency
Autorzy:: Żyra, A.
Bogucki, R.
Skoczypiec, S.
Powiązania:: https://bibliotekanauki.pl/articles/356439.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: electrodischarge machining
EDM
microstructure
Ti10V2Fe3Al alloy
Titanium Grade 2
Opis:: In the work results of research on electrodischarge machining (EDM) of titanium alloy Ti10V2Fe3Al with (α + β) structure were presented. Preliminary heat treatment of samples allows to obtain different morphology and volume fraction of the α phase. The main goal of research was to assessment of the material microstructure impact on EDM technological factors (ie. material removal rate, tool wear) and morphology of technological surface layer. Electrodischarge machining is alternative and increasingly used method of titanium alloys machining. Research allowed to indicate the possibilities and limitations of use EDM in this area. It is especially important in the aspect of parts produced for aircraft industry and related requirements for the technological surface layer quality.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 3; 1005-1010
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Investigation of the Influence of Process Parameters on Shape Deviation after Wire Electrical Discharge Machining
Autorzy:: Świercz, R.
Oniszczuk-Świercz, D.
Zawora, J.
Marczak, M.
Powiązania:: https://bibliotekanauki.pl/articles/355430.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: wire electrical discharge machining
WEDM
shape deviation
CFD
Opis:: New materials require the use of advanced technology in manufacturing parts of complex shape. One of the modern non-conventional technology of manufacturing difficult to cut materials is the wire electrical discharge machining (WEDM). The article presents the results of theoretical and experimental research in the influence of the WEDM conditions and parameters on the shape deviation during a rough cut. A numerical model of the dielectric flow in the gap (ANSYS) was developed. The influence of the dielectric velocity field in the gap on the debris evacuation and stability of WEDM process was discussed. Furthermore, response surface methodology (RSM) was used to build empirical models for influence of the wire speed V_d, wire tension force F_n, the volume flow rate of the dielectric Q_v on the flatness deviation after the WEDM.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 4; 1457-1462
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Impact of Cutting Forces and Chip Microstructure in High Speed Machining of Carbon Fiber - Epoxy Composite Tube
Autorzy:: Allwin Roy, Y.
Gobivel, K.
Vijay Sekar, K. S.
Suresh Kumar, S.
Powiązania:: https://bibliotekanauki.pl/articles/352953.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: composite materials
orthogonal machining
cutting forces
chip microstructure
Opis:: Carbon fiber reinforced polymeric (CFRP) composite materials are widely used in aerospace, automobile and biomedical industries due to their high strength to weight ratio, corrosion resistance and durability. High speed machining (HSM) of CFRP material is needed to study the impact of cutting parameters on cutting forces and chip microstructure which offer vital inputs to the machinability and deformation characteristics of the material. In this work, the orthogonal machining of CFRP was conducted by varying the cutting parameters such as cutting speed and feed rate at high cutting speed/feed rate ranges up to 346 m/min/ 0.446 mm/rev. The impact of the cutting parameters on cutting forces (principal cutting, feed and thrust forces) and chip microstructure were analyzed. A significant impact on thrust forces and chip segmentation pattern was seen at higher feed rates and low cutting speeds.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 3; 1771-1777
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Cast Hybrid Composites Designated for Air Compressor Pistons
Autorzy:: Dolata, A. J.
Dyzia, M.
Jaworska, L.
Putyra, P.
Powiązania:: https://bibliotekanauki.pl/articles/356742.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hybrid aluminium composites
glassy carbon
graphite particles
mould casting
machining
Opis:: The main purpose of the investigations was to develop the phase composition of the composite assuming that the component selection criterion will be the formability of piston work surfaces during the machining. Wear resistance under the friction conditions was assumed as the additional parameter for the assessment of composite material. In the study were used AlSi7Mg/SiC+Cg and AlSi7Mg/SiC+GR hybrid composites prepared by the stir casting method.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2A; 705-708
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Wire Electrical Discharge Machining Of Feal Intermetallic Sinters Without And With Addition Of Nano-Al2O3 Oxide Ceramic
Obróbka elektroerozyjna spieków na osnowie fazy międzymetalicznej feal bez i z dodatkiem nanoceramiki Al2O3
Autorzy:: Ziętala, M.
Durejko, T.
Łazińska, M.
Powiązania:: https://bibliotekanauki.pl/articles/356151.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: surface texture (ST)
abrasive wear resistance
wire electrical discharge machining (WEDM)
FeAl intermetallics
nano-Al2O3 addition
tekstura powierzchni
odporność na ścieranie
cięcie elektrozyjne
intermetaliczne spieki FeAl
nanoceramika Al2O3
Opis:: The influence of the parameters of wire electrical discharge machining (WEDM) on the surface layer of FeAl based sinters with and without Al₂O₃ nanoceramic addition has been studied in this paper. The properties of the sinters surface layer were controlled by WEDM parameters, including time of interval (t_p) and amplitude of current (I_A). The WEDM roughing and finishing treatments were carried out for selected technological parameters of process. The surface texture (ST) of the sinters after WEDM was analyzed by profilometer method. Theoretical parameters describing abrasive wear resistance of investigated sinters were estimated on the basis on the load capacity curve. On the basis on obtained results it can be stated that there is possibility of shaping geometry of nano- Al₂O₃ doped and undoped FeAl sinters by WEDM. Reduction of the time of interval (t _p) and increase of current amplitude (IA) during WEDM deteriorate surface properties. Addition of nano- Al₂O₃ improve the quality of the obtained surface. Applied parameters of WEDM improve theoretical abrasive wear resistance and lubricant maintenance of the nanoceramic doped material in comparison with undoped sinter.
W niniejszej pracy analizowano wpływ parametrów cięcia elektrozyjnego (ang. WEDM – wire electrical discharge machining) na warstwę wierzchnią spieków na osnowie fazy międzymetalicznej FeAl bez i z dodatkiem nanoceremiki Al₂O₃. Poprzez zmianę parametrów obróbki elektroerozyjnej, tj. czas przerwy (t_p) i natężenie prądu (I_A), sterowano właściwościami warstwy wierzchniej obrabianych spieków. Dla wybranych parametrów technologicznych procesu przeprowadzono obróbkę zgrubną i wykańczającą. Strukturę geometryczną powierzchni (SGP) spieków po obróbce elektroerozyjnej analizowano za pomocą metody profilometrycznej. Parametry charakteryzujące teoretyczną odporność na zużycie ścierne zostały oszacowane na podstawie krzywych nośności Abbotta-Firestone’a. Na podstawie uzyskanych wyników stwierdzono, że istnieje możliwość kształtowania geometrii spieków FeAl bez i z dodatkiem nanoceramiki Al₂O₃ za pomocą obróbki elektroerozyjnej WEDM. Wraz ze skróceniem czasu przerwy i wzrostem natężenia prądu podczas obróbki wzrasta chropowatość obrabianych powierzchni, natomiast dodatek nanoceramiki poprawia jakość otrzymanych powierzchni. Zastosowane parametry obróbki WEDM poprawiły teoretyczną odporność na zużycie ścierne i zdolność do przechowywania środka smarnego powierzchni spieków domieszkowanych nanoceramiką, w porównaniu do materiału niedomieszkowanego.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 3; 2447-2456
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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