Effect Of Post Weld Heat Treatment On Micro Structure & Corrosion Behavior Of Aa 7075 Friction Stir Welds
Journal Title: International Journal of Science Engineering and Advance Technology - Year 2016, Vol 4, Issue 6
Abstract
Aluminum AL7075 alloy is an attractive option for aerospace components in naval and defence applications due to its corrosion resistance and absence of melting related problems. This project reports the effects of post weld heat treatments, namely Peak age treatment and Retrogression and reaging on microstructure and mechanical properties of 12 mm thick friction stir welded joints of high strength AA7075 aluminum alloy. Welds were characterized for metallo graphy to carry out the micro structural studies using Optical Microscopy, hardness measurements were done using Vickers hardness tester. Potentio-dynamic polarization tests were carried out to determine the pitting corrosion behavior done using a basic electrochemical system. The results show that welds under peak age treatment (T-6) exhibit better mechanical properties compared to RRA treatment. Welds under Retrogression and reaging exhibit better corrosion resistance with marginal decrease in strength and which is attributed to the micro structural changes observed in both the weld joints.
Authors and Affiliations
R Chandra Sekhar Gubbala| Assistant Professor, Aditya Engineering College, Surampalem, Department of Mechanical Engineering, Akkaiah Nandigam| Assistant Professor, Anurag Engineering College, Kodad, Department of Mechanical Engineering, Arumulla Suresh| Assistant Professor, Anurag Engineering College, Kodad, Department of Mechanical Engineering
Keywords
Related Articles
- EP ID EP16761
- DOI -
- Views 312
- Downloads 8
Co-ordinate Control for Fuel Cell And Photovoltaic Cell
The usual natural fuel energy resources such as petroleum, natural gas, and coal are getting shortage rapidly by fulfilling the high demand of the energy sector in the world. Also, affect the environment and leads to...
The Effect of Aggregate Gradation on Design Mix using Modified Bitumen
Pavements undergo different type of stresses through out there life. Out of which rutting and fatigue are major distresses. To combat these problematic aspects of roads we have to deal from the root level of design m...
Simulation of VSC Based HVDC Transmission System under Fault Conditions
Voltage-source-converter high-voltage dc (VSCHVDC) transmission systems have evolved from simple two-level converters to neutral-point clamped converters and then to true multilevel converters such as modular converte...
Secure Gratified Allocation with Uncontrived System in Adhoc Networks
The open nature of wireless medium to disputes the network capacity. The adhoc networks presently categorized on cost and distance based networks, these are lack of network information and unpredictable mobility calc...
Fuzzy logic controller based DC-Link Voltage Self-Balance Method for Multilevel Converter with less Number of Voltage Sensors
In many inverters, Voltage balance of dclink capacitors is very important for applications of a cascade multilevel converter or a modular multilevel converter. In this paper, a novel diode-clamped modular multilevel c...