Papers Posted on - Sep / 2018


Author Name Gurveen Singh
PDF Download PDF
DOI http://dx.doi.org/10.11127/ijammc2018.09.01
Paper Title Haz Formation And Analysis In Flux Assisted Gtaw
Abstract
The effect of Silicon dioxide (SiO2) powder on weld bead geometry, Heat affected zone (HAZ), and micro-hardness of SS304 grade Austenitic stainless steel weld was investigated. SiO2 improves the weld bead penetration with a simultaneous reduction in bead width. The improvement in penetration results from arc constriction and reversal of Marangoni flow. The results demonstrate SiO2 flux can increase the heat density by arc constriction and Marangoni convection. The temperature in HAZ reaches above the recrystallization temperature and consequently leads to the formation of new grains. The new grains formed in HAZ are of a very large size as compared to parent metal grains. Due to Larger grains, the micro-hardness in HAZ area was found to be less than weld metal and base metal zone. Increased heat density by using SiO2 flux increased the size of Heat Affected Zone.
Keywords
Active TIG, Marangoni convection, arc constriction, HAZ
Author Name Jatinder Kaur
PDF Download PDF
DOI http://dx.doi.org/10.11127/ijammc2018.09.02
Paper Title Evaluation Of Microstructure And Mechanical Properties Of Explosively Welded Aluminium Alloy And Low Carbon Steel Plates
Abstract
In the present paper joining of aluminium alloy-AA1100 and low carbon steel (LCS) plates has been carried out using explosive welding technique. Welding parameters were optimized in order to achieve uniform and good quality welds. Optical and scanning electron microscope (SEM) were employed to observe the morphology and microstructure at the interface boundary. Mechanical properties of weld joints have been evaluated by carrying out ram tensile and hardness test. After successful joining of plates, the bonding interface had laminar morphology free from major cracks. No delamination was observed at the interface of the clad plate when subjected to chisel test. The bonding strength of the weld joint was more than the strength of weaker material.
Keywords
Low carbon steel, AA1100, explosive welding, interface
Author Name Seyed Ebrahim Vahdat
PDF Download PDF
DOI http://dx.doi.org/10.11127/ijammc2018.09.03
Paper Title Effect of Pouring Temperature on the Hardness and Wear Resistance of Bronze CuPb10Sn8Zn2
Abstract
In the production of engineering parts by casting method, the pouring temperature is an important variable. In this research, the effect of the pouring temperature on the two important characteristics, including the hardness and wear resistance of bronze bearing CuPb10Sn8Zn2 is studied. For this purpose, the melt is produced in a transistor induction furnace and, in the end, the microstructure (by using scanning electron microscope), hardness test (by using Brinell test device) and wear resistance (by using pin-on-disc at 440m and 10N force) of the bronze of CuPb10Sn8Zn2 bearings are compared in sandy mold at pouring temperatures of 950C and 1200C. The results indicated that at high pouring temperatures (1200C); the wear resistance is almost doubled, because the contents of intermetallic compound and solid solution were more and the content of lead was less.
Keywords
Microstructure; Bearing; Pouring; Casting
Author Name Rupali Baghel
PDF Download PDF
DOI http://dx.doi.org/10.11127/ijammc2018.09.04
Paper Title The Scope of Machining of Advanced Ceramics by Electro-Discharge Machining and Its Hybrid Variants
Abstract
The constraints with the applicability and technological limitation of metal and alloy lead to the origin of advanced ceramics products or devices to enhance the system productivity and effectiveness. Advanced ceramics matrix composites (CMCs), metal nanocomposites are prepared by pressing and high-temperature sintering. The excellent properties of ceramics are preserved by the amalgamation of metal or semiconducting phase with the convention ceramics. Electro-discharge machining (EDM) has the capability to machine very rigid to cut materials that are extremely difficult to the shape by any other regular method. In the past decade, many types of research have explored machining of advanced ceramics by EDM process and came out to be some unique process to machine even non-conventional ceramics and CMCs. Many research have been found in the field of hybrid EDM process to improve the machining outcome and more efficient use of the EDM tool. One of the revolutionary findings is to machining of non-conductive advanced ceramics by EDM process. In the present paper, a critical review of advanced ceramics machining by EDM and its hybrid for ceramics and its composite are presented.
Keywords
advanced ceramics; hybrid-EDM, mechanism
Author Name Md Zakir Hussain
PDF Download PDF
DOI http://dx.doi.org/10.11127/ijammc2018.09.05
Paper Title Evaluation Of Erosive Wear Rate Of Al2o3/Cu Composite Through Taguchi Method
Abstract
In transportation of pipes, pipes are subject to flow of fluids, erosive wear is an important phenomena that affecting the life of these pipes. This paper investigates the effect of wear parameters on Erosive wear rate of aluminium oxide/copper (Al2O3/Cu) composite using Taguchi method. The scanning microscope (SEM) image shows that the presence of Al2O3 particle. Spindle speed, impact angle, slurry weight % and sand particle size were taken in this study as controlled parameters. The erosive wear rate was measured using self designed pot tester. Taguchi’s L8 orthogonal array was used as experimental trial run purpose. The signal-to-noise (S/N) ratio and the analysis of variance were carried out in order to find most influential parameter that affect on erosive wear. The contour plot was used to evaluate the interaction effect of factors on erosive wear. Finally, confirmation test has been conducted to examine the validity of the predicted result. The S/N ratio shows the optimum combination of parameters and their levels was A1B1C1D1. The results of mean S/N ratio and ANOVA indicate that the factor impact angle has most effective factor that affect erosive wear followed by Spindle speed. The optical surface images shows that the samples were brittle fractured and particles are fragmented out from the surface during erosion test. Finally a regression equation was developed.
Keywords
Alumina/Copper composite; Erosive Wear Rate; Taguchi Method; Analysis of Variance.
Author Name U Ashok Kumar
PDF Download PDF
DOI http://dx.doi.org/10.11127/ijammc2018.09.06
Paper Title Experimental optimisation of process parameters on micro hole machining by Die sinker EDM
Abstract
The present work deals with micro hole machining of diameter 0.7mm (700μm) on SS316 materials using Die sinker EDM. The design of experiment plan was done by Taguchi L9 Orthogonal Array where the process parameters are current, Time-On, Time-OFF. The output performance are material removal rate, tool wear rate were examined.
Keywords
Micro hole 0.7mm, Die Sinker EDM, Taguchi, MRR, TWR.