ISSN (Print): 2333-8903

ISSN (Online): 2333-8911

Website: http://www.sciepub.com/journal/materials

Editor-in-chief: Serge Samper

Currrent Issue: Volume 4, Number 1, 2016

Article

Investigation of Weld Defects in Similar and Dissimilar Friction Stir Welded Joints of Aluminium Alloys of AA7075 and AA6061 by X-ray Radiography

1Mechanical Department, PSE, Saki-Palsana, Gujarat, India

2Mechanical Department, D. N. Patel C.O.E., Shahada, Maharashtra, India

3Mechanical Department, GDEC, Abrama, Gujarat, India


American Journal of Materials Engineering and Technology. 2016, 4(1), 11-15
doi: 10.12691/materials-4-1-3
Copyright © 2016 Science and Education Publishing

Cite this paper:
Chetan Patil, Hemant Patil, Hiralal Patil. Investigation of Weld Defects in Similar and Dissimilar Friction Stir Welded Joints of Aluminium Alloys of AA7075 and AA6061 by X-ray Radiography. American Journal of Materials Engineering and Technology. 2016; 4(1):11-15. doi: 10.12691/materials-4-1-3.

Correspondence to: Hiralal  Patil, Mechanical Department, GDEC, Abrama, Gujarat, India. Email: hspatil28@gmail.com

Abstract

X-ray radiography techniques are used for evaluation of the quality of the friction stir welded aluminium butt joints. This paper reports X-ray radiography testing conducted on similar friction stir welds between AA7075T651 aluminium alloy and dissimilar friction stir welds between aluminium alloys AA7075T651 and AA6061T6. The Friction stir welds of AA7075 & AA6061 aluminium alloy were produced at different tool rotational speeds and transverse speed. The tool rotational speed was varied from 800, 900, 1000 rpm while the transverse speed was varied from 30, 35, 40mm/min. The visual inspection and the x-ray radiographic testing techniques were employed to conduct the tests; these tests were conducted on the welds to ascertain the joint integrity before characterization to have an idea of the quality of the welds. In visual defects, the lateral flash was observed in most of the welds, but the x-ray radiography technique revealed the presence of lack of penetrations flaws in all weld samples and cracks, voids, wormhole defects in some of the welds. It was found that increasing the transverse speed increases the occurrence of weld defects.

Keywords

References

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[8]  Y.G. Kim, H. Fujii, T. Tsumura, T. Komazaki, K. Nakata, “Three defect types in Friction stir welding of aluminum die casting alloy”, Materials Science and Engineering A 415 (2006) 250-254.
 
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Article

Effect of pH on Production Process and Characteristics of Zirconium Carbide Nano Particles Synthesized by Sol-Gel Method

1Department of Material Science and Engineering, Imam Khomeini International University, Ghazvin, Iran


American Journal of Materials Engineering and Technology. 2016, 4(1), 6-10
doi: 10.12691/materials-4-1-2
Copyright © 2016 Science and Education Publishing

Cite this paper:
Saeid Baghshahi, Mahmoud Shayestefar, Bahman Mirhadi. Effect of pH on Production Process and Characteristics of Zirconium Carbide Nano Particles Synthesized by Sol-Gel Method. American Journal of Materials Engineering and Technology. 2016; 4(1):6-10. doi: 10.12691/materials-4-1-2.

Correspondence to: Mahmoud  Shayestefar, Department of Material Science and Engineering, Imam Khomeini International University, Ghazvin, Iran. Email: m.shayestefar@gmail.com

Abstract

Zirconium carbide nanoparticles were synthesized by a sol–gel method. Zirconium n-Propoxide and sucrose were used as sources of zirconium and carbon, respectively. The influence of pH value of solution on the properties of the resultant powder was investigated. The reactions were substantially completed at a relatively low temperature (1400°C). X-ray diffraction and scanning electron microscopy were used to study crystal structure and morphology of the synthesized powder. XRD analysis showed that at the highest pH, only ZrC phase could be observed. Results also show that pH has a strong effect on the particles size range of ZrC powder so that at pH 4.2, 5.2 and 6.2, the size range of 130–190, 90–150 and 50–100 nm were obtained, respectively. It was also found that pH variation had no effect on the morphology of the sphere-shaped particles.

Keywords

References

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[5]  Bandyopadhyay TK and Das K, “Processing and characterization of ZrC-renforced steel-based composites,”J Mater Process Technol, 178(1-3), 335-341, Sep 2006.
 
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Article

Experimental Investigation on Surface Finish during Turning of Aluminum under Dry and Minimum Quantity Lubrication Machining Conditions

1Mechanical Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt


American Journal of Materials Engineering and Technology. 2016, 4(1), 1-5
doi: 10.12691/materials-4-1-1
Copyright © 2016 Science and Education Publishing

Cite this paper:
A Hemaid, Tarik Tawfeek, A. A. Ibrahim. Experimental Investigation on Surface Finish during Turning of Aluminum under Dry and Minimum Quantity Lubrication Machining Conditions. American Journal of Materials Engineering and Technology. 2016; 4(1):1-5. doi: 10.12691/materials-4-1-1.

Correspondence to: Tarik  Tawfeek, Mechanical Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt. Email: tariktewfic@yahoo.co.uk

Abstract

In the last decades, light materials, such as aluminum, are increasing their use in wide range ‎of industrial applications. The growing use of aluminum encourages the study of its use under ‎different production processes. In this sense, the present study shows an experimental investigation in turning of aluminum, with the use of dry and minimum quantity lubrication (MQL) system. To evaluate turning process, continuous bars was used. The process is evaluated taking the surface roughness as response variable. The cutting conditions include feed rate, cutting speed and the coolant flow rate. The work-piece material and its size, the cutting tool (HSS) and the depth of cut were kept constant for the study. It has been observed that a small amount of supply of coolant at the point of cutting, largely improves the surface finish. In many cases further amount of coolant administration has very little effect on the surface quality. Thus Minimum Quantity Lubrication (MQL) can achieve the required surface quality eliminating the problems of flood cooling.

Keywords

References

[1]  Nourredine Boubekri and Vasim Shaikh, “Minimum Quantity Lubrication (MQL) in Machining: Benefits and Drawbacks,” Journal of Industrial and Intelligent Information, Vol. 3, No. 3, , 2015, 205-209.
 
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[4]  Thanhtrung Dang1, Thanhnghia Nguyen2 and Tronghieu Nguyen1”An Experimenatl Study on Heat Transfer Behaviors of A Welded - Aluminum Minichannel Heat Exchanger”, International Journal of Computational Engineering Research (IJCER), Vol, 05, February 2015, 39-45.
 
[5]  Ranganath M S, Vipin, R S Mishra,”Optimization of Surface Roughness and Material Removal Rate on Conventional Dry Turning of Aluminium” International Journal of Advance Research and Innovation Volume 1, 2014, 62-71.
 
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