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2: Microstructure of Aluminum plate AA6063 and Microstructure of AA 6063 reinforced with Al 2 O 3 composite
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Research is carried out on the effect of introducing Alumina particles Al2O3, which has increased the mechanical properties of 6063 Aluminium alloy. This can be achieved by incorporating the ceramic particles on the surface of the metals/alloys via FSP technique. During the process, Alumina particles are dispersed in the surface of AA 6063 Al alloy...
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A double reinforced layer on an aluminum alloy surface was produced using friction stir processing (FSP) by adding 34CrNiMo6 powder into Al (AA2024) substrate for better wear resistance and gradient transitions. The microstructures of the composites were analyzed using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The...
Citations
... HV. Due to the hard behavior of B 4 C, the reinforcement in sample 1 helped the specimen to achieve enhanced microhardness value as compared to sample 2. These results are in agreement with Britto et al. [25] who investigated the hardness properties of FSPed aluminum 6063 alloys and found similar results. Table 3 shows the average microhardness value for samples 1 and 2. Fig. 4 shows the microhardness profile for the produced surface composites. ...
... The worm like structure shows the defect granules in the weld zone. The big hallow structure in image shows the small chip errors in the weld zone [7]. ...
AZ31 magnesium alloy which are difficult to join by the traditional fusion welding techniques because of the production of porosity in the joint resulting in the weakening of its mechanical properties have been fabricated by friction stir welding. The friction stir welding is a technique that welds the work piece in solid state. During friction stir welding process the heat is generated by friction. Post weld heat treatment (PWHT) is carried on the work piece after friction stir welding is done. Metallurgical and mechanical characteristics of AZ31 magnesium alloy after post weld heat treatment is determined. At a rotational speed of 1100 rev/min and transverse speed of 48mm/min the yield tensile strength of 128.1MPa and 162.2 MPa ultimate tensile strength of this joint achieved. The influence of the welding parameters on the welding quality was shown by the result. Stainless steel of grade 24 (SS24) was used as a stir tool. Joining of the two AZ31 magnesium alloy plates by Friction stir welding is done successfully.
... The chemical analysis of the materials aluminum alloy of AA2024 and AA7075 are given in table 1. Figure 1 shows the friction stir welding. led in UTM model no: ZWICK-ROELL Z100, to discover one of the mechanical properties such as yield stress and ultimate stress [6]. Table 2 given the specification and dimension of tensile test for the specimen. ...
The study of micro structure characteristics of the joint of the material 2024 Al alloy and 7075 Al alloy fabricated in friction stir welding. FSW of dissimilar aluminum alloy has become an important application in modern industries. The impact of speed of welding and fixed area of base metal on micro structure and tensile strength of welding joints were examined. SEM - EDS examination exposed that the stir Zone composed of a mixed structure and they are using in onion ring pattern a periodic with the change of grain size as the can be heterogeneous distribution of the alloying elements. The tensile strength of 184Mpa was attained for jointly produced can be welding speed 50mm/s.
... It has been found that the average tensile strength of friction processed samples was improved by 10%, while the elongation decreased by 50% due to presence of alumina particle in the matrix. The hardness of 6063 aluminum plates were increased by adding alumina particles to the plate surface during FSP [26]. The rotation speed and the transverse welding speed affected the reinforcement particle distribution in the modified surface sheet of aluminum reinforced by SiC particles as reported by Kurt et al [27]. ...
The main aim of this investigation is to produce a welding joint of higher strength than that of base metals. Composite welded joints were produced by friction stir welding process. 6061 aluminum alloy was used as a base metal and alumina particles added to welding zone to form metal matrix composites. The volume fraction of alumina particles incorporated in this study were 2, 4, 6, 8 and 10 vol% were added on both sides of welding line. Also, the alumina particles were pre-mixed with magnesium particles prior being added to the welding zone. Magnesium particles were used to enhance the bonding between the alumina particles and the matrix of 6061 aluminum alloy. Friction stir welded joints containing alumina particles were successfully obtained and it was observed that the strength of these joints was better than that of base metal. Experimental results showed that incorporating volume fraction of alumina particles up to 6 vol% into the welding zone led to higher strength of the composite welded joints as compared to plain welded joints.
Friction stir welding (FSW) is a friction-based solid phase joining process especially used to join high quality aircraft and aerospace aluminium alloys such as AA2024, AA7075. The aim of this study is to analyze the characterization of weld joint of aluminium alloy AA7075 T651 made by a newly developed stellite stir tool. Stellite stir tool can withstand at elevated temperature and having high hot hardness compared to the existing material such as H13 stir tool. Also, this process reduces the cost and increase the life span of the tool. The analysis is made using Stellite cobalt based alloy stir tool using tensile test, hardness test and SEM confirms that the joints are having good properties.
