The current experimental study is to investigate the effects of process parameters (cutting speed, feed rate and depth of cut) on performance characteristics (surface roughness, machining force and flank wear) in hard turning of AISI 4340 steel with multilayer CVD (TiN/TiCN/Al2O3) coated carbide insert. Combined effects of cutting parameter (v, f, d) on performance outputs (Ra, Fm and VB) are e...

The development of new cutting tool materials during the last few years is based mainly on submicron hardmetal substrates as well as on new PVD and CVD coatings. The development of submicron and nanopowders with higher strength and higher fracture toughness solves problems in machining high-temp alloys, hard materials, and in dry cutting. Based on physical models used to calculate stress in the...

Cathode materials always limit the performance of fuel cells while the commercial platinum-based catalysts hardly meet the requirements of low cost, durable and stable. Here a non-precious metal oxygen reduction reaction (ORR) electocatalyst based on titanium nitride/titanium carbonitride hierarchical structures (TNTCNHS) is demonstrated as high activity as Pt/C. In alkaline condition, tuning i...

Since the cutting tools used in machining process of super alloys are subjected to high cutting forces, accordingly tools life is reduced, therefore improvement in alloys machining and reducing cutting forces to achieve longer tools life is an essential necessity. In this research, the effect of changes in feed rate on cutting forces in machining process of nickel based super alloys is investig...

In this Study, surface of medium carbon steel (AISI 1045) was modified by titanizing followed by plasma nitriding. Titanizing was performed using pack cementation method, in a pack mixture of ferrotitanium, ammonium chloride and alumina, at 1223 K for 45 and 180 min.  Plasma-nitriding was conducted at two temperatures of 803 and 823 K for 5 h, in a gas mixture of 75%N2+25%H2. The samples were c...

Intermittent turning (IT) is characterized by a different context than continuous (CT). The cutting tool shocked each time it goes off-load and engages new surface. This interruption causes severe conditions, which fatally affect the performance parameters. purpose of this study to assess effects four factors, nose radius (r), speed (Vc), feed rate (f), depth cut (ap), on following output param...

Functionally graded materials are important in laboratory and industry. These have opened a new area of research. functionally can be produced as result composite material by the adding more to get desired properties make it perfect for suitable applications. In this paper, focus is on modelling that developed resist wear any friction or erosion liquid. Cemented Carbide (WC) was selected common...

Bu çalışmada, içeriği bilinmeyen ve yüzeyi farklı bir malzeme ile kaplanmış numunenin kaplama yüzeyine tahribatsız olarak EDS-SEM analizleri yapılarak altlık malzemelerde bulunan elementlerin belirlenmesi birbirinden ayırt edilmesi hedeflenmiştir. amaç doğrultusunda, EDS sırasında etkileşim hacmini etkileyerek tanelerden karışık şekilde x-ışını sinyallerinin elde edilmesini engelleyebilen hızla...