MICROSTRUCTURAL PROPERTIES AND PHASE CONSTITUENTS OF 5A06 ALUMINIUM MATRIX SURFACE COMPOSITE FABRICATED BY FRICTION STIR PROCESSING

2011 ◽  
Vol 18 (05) ◽  
pp. 183-188
Author(s):  
LIU PENG ◽  
QING-YU SHI ◽  
YUAN-BIN ZHANG ◽  
SHU-BO XU
Keyword(s):  
Base Metal ◽  
Friction Stir Processing ◽  
Aluminium Matrix ◽  
Air Cooling ◽  
Friction Stir ◽  
Surface Composite ◽  
Ultrafine Grained ◽  
Matrix Surface ◽  
Average Grain Size ◽  
Amorphous Structures

A novel aluminium matrix surface composite added Al -based amorphous, whose layer depth was 5 mm, was fabricated by friction stir processing (FSP), at an air cooling. The surface composite region shows the obvious sandwich structure. It is considered to be a combination between the base metal and the amorphous strip via the FSP. The average hardness of the surface composite is about HV97, higher than the base metal is about HV80. The maximum tensile strength of the processed aluminium plate with the surface composite is 410 MPa. XRD results indicate that the constituent phases of the surface composite mainly include α- Al , Mg2Al3 , MnAl6 and La3Al11 Moreover, no obvious amorphous diffraction peaks are observed in the XRD results. However, a large number of ultrafine grained structures can be observed in the surface composite. The average grain size of them is ~90–400 nm constitutes the surface composite. These ultrafine grained structures are composed of the α- Al and α- Al amorphous structures.

Development and Parametric Optimisation of Pure Magnesium Matrix Surface Composite by Friction Stir Processing

2021 ◽  
Vol 9 (2) ◽  
pp. 79-95
Author(s):  
Balraj Singh ◽  
Jagdev Singh ◽  
Ravinder Singh Joshi
Keyword(s):  
Process Parameters ◽  
Friction Stir Processing ◽  
Mechanical Performance ◽  
Plunge Depth ◽  
Friction Stir ◽  
Surface Composite ◽  
Cooling Temperature ◽  
Matrix Surface ◽  
Taguchi’S Technique ◽  
Tool Cooling

Friction stir processing (FSP) is an emerging method for improving surface properties of materials by composite fabrication. This study aims at optimizing the major FSP parameters and analysis of their real-time influence on the mechanical performance of a surface composite fabricated with Magnesium (Mg) matrix and Titanium Carbide (TiC) as reinforcement. Effects of different process parameters, tool rotational speed, plunge depth, the linear speed of the tool, cooling condition, and number of FSP passes have been examined. Using L27 array, a total of 27 combinations of these process parameters were analyzed by taking microhardness as an output response to find influential parameters by Taguchi's technique. Maximum micro-hardness was achieved when tool rpm of 600, cooling temperature of -10o C, tool feed of 15 mm/min, plunge depth of 0.35 mm, and 3 passes of FSP tool were chosen with the help of Taguchi's method. Analysis of variance indicated that cooling temperature, the tool feed, and the number of passes of the FSP tool were the most significant parameters.

Direct Extrusion of Circular Profiles with Surface Composite Produced by Friction Stir Processing

2011 ◽  
Vol 383-390 ◽  
pp. 2747-2752
Author(s):  
Arash Aghagol ◽  
Saeed Mahmoodi Darani ◽  
Karen Abrinia ◽  
Mohammad Kazem Besharati Givi
Keyword(s):  
Base Metal ◽  
Friction Stir Processing ◽  
Composite Layer ◽  
Traverse Speed ◽  
Extrusion Ratio ◽  
Friction Stir ◽  
Surface Composite ◽  
Direct Extrusion ◽  
Shoulder Diameter ◽  
Before And After

In this research, a new application of friction stir processing (FSP) in producing surface composite on circular billets was introduced. Al/Cu composite was fabricated by FSP on the surface of a 1050 aluminium cylinder with the diameter of 60 mm. Then this cylinder with surface composite was extruded with the extrusion ratio of 1.7. Finally, microstructure and microhardness were investigated before and after the extrusion. H13 hot work steel was used as the material of the tool whose pin diameter and length were 6 mm and shoulder diameter was 18 mm. The rotation and traverse speed of the tool were 1000 rpm and 25 mm/min respectively. The microstructural investigations show that the thickness of the composite layer decreases and a uniform layer of the composite remains on the surface after the extrusion. Also the microhardness measurements demonstrated that the hardness of the composite layer was higher than the base metal and the microhardness of all zones increased after the extrusion.

scholarly journals Fabrication of Hybrid Surface Composite through Friction Stir Processing and Its Impression Creep Behaviour

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
S. Prakrathi ◽  
M. Ravikumar ◽  
K. R. Udupa ◽  
K. Udaya Bhat
Keyword(s):  
Activation Energy ◽  
Base Metal ◽  
Friction Stir Processing ◽  
Creep Resistance ◽  
Creep Mechanism ◽  
Stir Zone ◽  
Aluminium Matrix ◽  
Diffusion Creep ◽  
Impression Creep ◽  
Friction Stir

Al-Ni in situ surface composites were fabricated by friction stir processing method. Friction stir processing produced a composite with nickel and NiAl3 as reinforcement particles in aluminium matrix. The particles were fine and were in the submicrometer size range. The separation distance between the particles was very small. Impression creep experiments were conducted on the samples both at friction stir zone and base material zone at various temperatures. Steady state creep rates were estimated, and activation energy for creep was calculated. It is observed that the friction stir zone offered a higher creep resistance compared to the base metal zone. Higher creep resistance is attributed to the dissolution of nickel atoms into aluminium matrix and the presence of fine nickel particles and NiAl3 precipitates. The measured activation energy indicated that the associated creep mechanism is the dislocation creep in the temperature range of 30–150°C, both in friction stir zone and base metal zone. At higher temperatures (150–180°C) the diffusion creep mechanism is suggested.

scholarly journals Development of Mild Steel – B4C Surface Composite by Friction Stir Processing

2017 ◽  
Vol 10 (30) ◽  
pp. 1-6 ◽  
Author(s):  
Jayant Joshi ◽  
Abhishek Kumar Pandey ◽  
Sunil Pandey ◽  
S. Aravindan ◽  
◽  
...  
Keyword(s):  
Mild Steel ◽  
Friction Stir Processing ◽  
Friction Stir ◽  
Surface Composite
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