• Mahandiran, S. Balu
• Prakash, B. Vijaya
• Sanddep, Ch
• Amarnath, V.
• Shanthi, C.

Abstract

<jats:p>&lt;div class="section abstract"&gt;&lt;div class="htmlview paragraph"&gt;The increased adoption of AA2014 Aluminum alloy within the manufacturing sectorcan be attributed to its lightweight properties and other attributes thatposition it as an appealing substitute for steel. Notably, AA2014 Aluminum alloyis employed in the production of components and frameworks for aircraft engines.However, conventional welding techniques do not always seamlessly apply toaluminum alloys due to aluminum's high thermal conductivity, pronouncedsusceptibility to oxidation, and comparatively low melting point. Thesecharacteristics can give rise to challenges such as burn-through and porosityduring welding. To tackle these issues, the application of friction stir welding(FSW), a solid-state welding method, has been embraced. In the creation of lapjoints, five distinct tools, each featuring a different ratio of tool shoulderdiameter (D) to pin diameter (d), ranging from 2 to 4, were employed. Anexhaustive evaluation of the mechanical and metallurgical properties of theselap joints was conducted, establishing correlations with the microstructure andmicrohardness of the stir zone. The outcomes of this investigation disclose thatthe lap joint crafted using a D/d ratio of 3.0 showcases superior mechanicalattributes when compared to lap joints produced at other D/d ratios. Thisenhancement is attributed to the emergence of finely refined grain structureswithin the stir zone during the friction stir welding process, coupled withheightened levels of hardness. These elevated hardness levels are identified asthe primary contributors to the favorable mechanical and metallurgical qualitiesobserved within the joint.&lt;/div&gt;&lt;/div&gt;</jats:p>

Topics

• impedance spectroscopy
• grain
• aluminium
• steel
• hardness
• thermal conductivity