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Experimental Investigation on Similar and Dissimilar Materials of AZ31/AZ91 Mg Alloys by Friction Stir Welding

Experimental Investigation on Similar and Dissimilar Materials of AZ31/AZ91 Mg Alloys by Friction Stir Welding
	© 2022 by IJETT Journal
	Volume-70 Issue-11
	Year of Publication : 2022
	Authors : M. Yugandhar, B. Prabhakar Kammar, S. Nallusamy
	DOI : 10.14445/22315381/IJETT-V70I11P236

How to Cite?

M. Yugandhar, B. Prabhakar Kammar, S. Nallusamy, "Experimental Investigation on Similar and Dissimilar Materials of AZ31/AZ91 Mg Alloys by Friction Stir Welding," International Journal of Engineering Trends and Technology, vol. 70, no. 11, pp. 338-352, 2022. Crossref, https://doi.org/10.14445/22315381/IJETT-V70I11P236

Abstract
Friction Stir Welding (FSW) efficiently bonded with two exceptional magnesium (Mg) plates one with less aluminum (AZ31/AZ91) content as well as the opposite with more aluminum (AZ91/AZ31). The impact of procedure elements on warm crack improvement was tested. In most efficient procedure situations at one-of-a-kind parameters (AZ91/AZ91 and AZ31/AZ31 comparable aggregate) with one-of-a-kind rpm like 1600, 1400, and 1200 and one-of-akind feed charges like 25,50 and 75mm/min feed under this sound weld 1400 rpm with 25 mm/min feed. A valid metallurgical joint with great grains and dispersed (Mg17Al12) phase inside the nugget zone become achieved and parallel (AZ31/AZ91 multiple mixtures). A growing fashion in hardness measures has also revealed the extended aluminum dissolution in the nugget region. The AZ31 Mg alloy aspect (advancing) had a distinct touch between the nugget sector and the Thermo Mechanical Affected Quarter (TMAZ), but no longer the AZ91 Mg alloy side (withdrawing). It is viable to draw conclusions based on the findings. FSW can be used to sign up for assorted metals, including difficult-to-method metals like Mg alloys, and warm cracking may cause completely prevented by deciding on suitable system parameters to gain a sound joint. The impact of manner optimizing values for the joining of AZ91/AZ31 Mg alloy plates at some point of FSW became investigated in this observation. A hit joint was installed at a device circular motion of 1100rpm and also a device journey space of 25mms/min. The aggregate for holder along with tool rotational and travel speeds has had a large impact on the fabric waft tactics in the nugget region. The microstructural analyses revealed that the joint improvement changed in most cases as a result of the mechanical blending of the additives. The nugget sector changed discovered to be terrible, and there has been a sharp interface on the joint. Microhardness assessments throughout the weld joint adding indicated a lack of entire metallurgical bonding. The presence of magnesium and aluminum turned into revealed by way of X-ray diffraction material examination on the weld area. From the observed results, it may be concluded that FSP may be used to combine AZ91 Mg alloy and AZ31 alloy despite the fact that complex demanding situations in fabric blending require additional exploration.

Keywords
Similar, Dissimilar, AZ-31/AZ91, FSW process, Nugget zone, Thermo mechanical, HAZ, TAMZ.

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