Effect of Temperature and Strain Rate on Deformation Behavior of Zirconium Alloy: Zr-2.5Nb-0.5Cu
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): K.K. Saxena , S. Sonkar , R. Kumar , V. Pancholi , G.P. Chaudhari , D. Srivastava , G.K. Dey , S.K. Jha , N. Saibaba Hot workability of Zr alloy has been investigated by means of hot compression test using Gleeble-3800. Hot compression test was performed in the temperature and strain rate range of 700 to 925oC and 0.01 -10s-1, respectively. Deformation behavior was characterized with the help of processing maps using Dynamic Material Model (DMM). From the power dissipation map peak efficiency of 48-55% was obtained at temperature of ...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Multi Objective Optimization of Friction Stir Welding Parameters for Joining of Two Dissimilar Thin Aluminum Sheets
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): R.K. Kesharwani , S.K. Panda , S.K. Pal The article presents multi objective optimization of parameters affecting weld quality in tailored friction stir butt welding of 2.0mm thin dissimilar sheets of AA5052-H32 and AA5754-H22 using Taguchi grey based approach. The L9 orthogonal array has been used to design the experiments, and the experiments have been conducted in a laboratory stage vertical milling machine by varying tool rotational speed, worktable translational speed, tool shoulder diameter and tool pin geometry. After welding, the w...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Motor Current Signature Analysis for Bearing Fault Detection in Mechanical Systems
The objective of this paper is to detect bearing faults (outer race fault) in a mechanical system using motor current signature. Fast Fourier Transform (FFT) is initially employed for a first comparison between a healthy and a defective bearing. Six wavelets are considered out of which three are real valued and remaining three are complex valued. Base wavelet has been selected on the basis of wavelet selection criteria - Maximum Relative wavelet energy. Then, 2D wavelet scalogram has been used for the detection and occurrence of outer race faults of various sizes in ball bearings of mechanical systems using motor current s...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Effect of Surface Crack and its Size on Mechanical Characteristics of Gold Nano-wires
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Karanvir Saini , Navin Kumar Nano-crystalline materials are well known for properties resulting from well ordered structure and lack of unevenness due to presence of defects like cracks, inclusions, voids etc. Occurrence of these defects in nano-crystalline materials cannot be ignored and their presence strongly influences many of the properties of the materials. In present study, atomistic simulations have been used to investigate the torsional mechanical properties of gold nano-wires having surface-crack like defect. Cracks with its lengt...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Effect of Thickness and Grain Size on Flow Stress of Very Thin Brass Sheets
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Dhruv Anand , D. Ravi Kumar The deformation behavior of metal sheets is strongly influenced by the extent of miniaturization due to the size effects (specimen size and grain size). In this paper, the effect of thickness and grain size on the flow stress of very thin brass sheets has been investigated by conducting microstructural studies and uni axial tensile tests on annealed specimens of thickness in the range 50μm-200μm.To obtain a large variation in thickness to grain size (t/d) ratio, different combinations of annealing temperature a...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Effect of Minimum Quantity Lubrication (MQL) on Surface Roughness of Mild Steel of 15HRC on Universal Milling Machine
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): S.B. Kedare , D.R. Borse , P.T. Shahane In this research work, the effects of three parameters, namely, cutting speed, feed and depth of cut were studied upon Surface Finish during milling operation. The end milling was performed under the Minimum Quantity Lubrication condition (900ml/hr) using end mill cutter and compared with conventional flooded lubrication (2liter/min). The comparative effectiveness was investigated in terms of surface finish. The surface finish was found to be improved by 27%. The findings of this study show that MQL ...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Minimization of Kerf Taper Angle and Kerf Width Using Taguchi's Method in Abrasive Water Jet Machining of Marble
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Vishal Gupta , P.M. Pandey , Mohinder Pal Garg , Rajesh Khanna , N.K. Batra Abrasive water jet cutting is a non-traditional machining method that offers a productive alternative to conventional techniques. It uses a fine jet of ultra high pressure water and abrasive slurry to cut the target material by means of erosion. This paper attempts to investigate kerf characteristics in abrasive water jet machining of marble which is having wide applications in domestic, commercial and industrial construction work. Three different process paramet...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Friction Stir Welding of Austenitic Stainless Steel by PCBN Tool and its Joint Analyses
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Manish P. Meshram , Basanth Kumar Kodli , Suhash R. Dey AISI-316 plates of thickness 4mm are joined by friction stir welding (FSW) with varying welding parameters like tool rotation speed (rpm) and welding speed (mm/min). All welded samples are observed by optical microscopy followed by their tensile tests. Mechanical strength of 104% of the base material with comparable elongation is achieved in FSW sample of 1100rpm rotation speed and 8mm/min welding speed. (Source: Procedia Materials Science)
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Development of Thin Sheets from Fe-P Alloys through P/M Technique
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Shefali Trivedi , D. Ravi Kumar , S. Aravindan Cracks due to segregation of Fe3P along the grain boundaries is a major problem in working of Fe-P alloys, processed in conventional wrought route. The present work deals with development of binary Fe-P alloys with varying content of phosphorus (in the range 0.1-0.35%) through powder metallurgical technique to obtain better mechanical properties without the problem of segregation. These alloys were processed into thin sheets by hot forging and rolling. The developed Fe-P alloy sheets were char...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Formability Limit Diagrams of Extra-deep-drawing Steel at Elevated Temperatures
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): R. Raman Goud , K. Eswar Prasad , Swades Kumar Singh In the present work forming limit diagrams for extra deep drawing steel at room and elevated temperatures have been determined experimentally by conducting stretch forming operations using designed and fabricated warm forming tooling setup. With the help of FLDs formability of EDD steel has been analyzed and co-related with mechanical properties like strain hardening coefficient (n) and normal anisotropy (r-).Material properties of EDD steel are calculated at various temperatures and eff...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Effect of Process Parameters and Metallographic Studies of ASS-304 Stainless Steel at Various Temperatures under Warm Deep Drawing
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Lade Jayahari , B. Balu Naik , Swadesh Kumar Singh Warm forming of high strength sheet metal alloys are in great demand and its application has importance in defense and nuclear industries. In the present investigation the austenitic stainless steel (ASS)-304 blanks are deep drawn under warm conditions using 20Ton hydraulic press and observed that at lower punch speed when the cup is drawn at elevated temperatures the formability is improved. Numbers of deep draw experiments are conducted under warm conditions to study the microstructure a...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Finite Element Modelling of Electro-hydraulic Forming of Sheets
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Tushar Mane , Vasu Goel , Sachin D. Kore High velocity sheet metal forming methods, such as electromagnetic forming and electro hydraulic forming (EHF), are based on high voltage electrical energy. This paper gives theoretical details about high strain rate forming in the Electrohydraulic forming process. Following the experimental results in the literature, a simulation of the high strain rate forming was prepared in ABAQUS-CAE wherein a dynamic loading on a sheet blank was applied and was allowed to plastically deform following the Johns...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Experimental Study to Assess the Effect of Electrode Bottom Profiles while Machining Inconel 718 through EDM Process
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): M. Manohar , T. Selvaraj , D. Sivakumar , Shibu Gopinath , Koshy M. George Electrical Discharge machining (EDM) is a non-conventional machining process, in general adopted to produce components with complex profiles that are difficult to be achieved through conventional manufacturing processes. Since long, EDM is widely used in industries to machine ‘difficult to machine materials’ like HCHC steel (tool and die material). INCONEL 718 is one of the alloys that have relatively poor machinability in the conventional machining processes,...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Machinability Assessment through Experimental Investigation during Hard and Soft Turning of Hardened Steel
In this study, experimental investigations were carried out to assess the machinability of hardened AISI 4340 steel during hard (55 HRC) and soft turning (35 and 45 HRC) using TiC mixed alumina ceramic tools. Mathematical models, which can predict the machining performances, namely, chip-tool interface temperature, cutting forces and surface roughness were developed based on experimental observations. Effect of workpiece hardness and cutting parameters, namely, cutting speed, depth of cut and feed on different responses were analyzed by performing ANOVA technique. Experimental observations indicate higher cutting forces, h...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
Numerical Modeling of Part-through Cracks in Pipe and Pipe Bend Using XFEM
Publication date: 2014 Source:Procedia Materials Science, Volume 6 Author(s): Kamal Sharma , I.V. Singh , B.K. Mishra , V. Bhasin In this work, extended finite element method (XFEM) is used to evaluate the stress intensity factors (SIFs) of a semi-elliptical part through thickness axial/circumferential crack. The pipe or pipe-bend having a crack on the outer surface is subjected to internal pressure or opening bending moment. Partition of unity approach is used to enrich the displacement approximation with the help of additional functions. To accurately model a crack, the level set functions are approximated by hig...
Source: Procedia Materials Science - October 12, 2014 Category: Materials Science Source Type: research
