Friction Stir Welding of Aluminum Alloy 1100 and Titanium-Al Alloy

2016 ◽  
Author(s):  
B. K. Dhindaw ◽  
P. S. De ◽  
Priyadarshini Jayashree
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
High Speed ◽  
High Speed Steel ◽  
Al Alloy ◽  
Ti Alloy ◽  
Joint Region ◽  
Friction Stir ◽  
Shoulder Region ◽  
Material Mixing

A intercalating joint between Al and Ti alloy is friction stir welded using a high speed steel tool. The material mixing occurs mainly in the shoulder region while the pin region shows nominal mixing. Microscopy and hardness experiments indicate sporadic formation of intermetallic compounds. The joint region near the shoulder and to some extent below it shows increase in hardness compared to the base Ti alloy.

scholarly journals Wear Inducing Phase Transformation of Plasma Transfer Arc Coated Tools during Friction Stir Welding with Al Alloy

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Kuan-Jen Chen ◽  
Fei-Yi Hung ◽  
Truan-Sheng Lui ◽  
Yong-Ren Shih
Keyword(s):  
Wear Resistance ◽  
Phase Transformation ◽  
Friction Stir Welding ◽  
High Speed ◽  
Phase Transfer ◽  
Welding Process ◽  
High Speed Steel ◽  
Al Alloy ◽  
Transfer Layer ◽  
Friction Stir

The friction stir welding process (friction stir welding/processing, FSW/FSP) has wear problems related to stirring tools. In this study, the plasma transfer arc (PTA) method was used with stellite 1 powders (Co-based) to coat on the head of a SKD61 stirring tool (SKD61-ST1) in order to investigate the wear performance and phase transformation of SKD61-ST1 after FSW. Under the same experimental parameters, the wear data were compared with the high-speed steel SKH51 (tempering material SKH51-T and annealed material SKH51-A) and tungsten-carbide cobalt (TCC). Results showed the PTA coating was a γ-Co solidification matrix with M7C3 and M23C6 carbides. After FSW, the wear resistance of SKD61-ST1 was better than that of SKH51-A and SKH51-T and lower than that of TCC. The SKD61-ST1, SKH51-A, and SKH51-T stirring tools exhibited sliding wear after FSP, where the pin and shoulder of the stirring tool formed a phase transfer layer on the surface, and the peeling of the phase transfer layer caused wear weight loss. The main phase of the phase transfer layer of the SKD61-ST1 tool was Al9Co2. The affinity and adhesion energy of the Co-Al phase was lower than that of Fe-Al phase, and the phase transfer layer of the SKD61-ST1 tool was thinner and had lower coverage, thereby increasing the wear resistance of the SKD61-ST1 stirring tools during FSW.

Microstructure and Mechanical Properties of Friction Stir Welding Joint of Pure Copper

2011 ◽  
Vol 418-420 ◽  
pp. 1520-1523
Author(s):  
Yong Zhao ◽  
You Li Ye ◽  
Keng Yan ◽  
Li Long Zhou
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
High Speed ◽  
Bonding Temperature ◽  
Pure Copper ◽  
High Speed Steel ◽  
Weld Nugget ◽  
Nugget Zone ◽  
Friction Stir ◽  
Welding Joint

Microstructures and mechanical properties of pure copper weld joints are discussed under different parameters of friction stir welding. The results reveal that it is conducive to the formation of compact joint in friction stir welding by applying high speed steel tool with high anti-bonding temperature. The friction stir welding joint with compact and defect-free microstructure could be obtained when the tool rotation rate is 1250- 1650 r/min and the tool traverse speed is 20-50 mm/min. Intensively plastic deformation occurs in the soften materials of the weld nugget zone and numerous crystal particles are broken under the influence of tool stirring. The microstructure of weld nugget zone is composed of tiny isometric crystals, which is due to the dynamic recrystallization of broken crystal particles. The structure of thermo-mechanical affected zone on both sides is asymmetric. Obvious boundary of the thermo affected zone could be seen on the advancing side, and the plastic streamline is apparent.

The Organization and Microhardness of the Coating of Aluminum Alloy after FSP

2012 ◽  
Vol 472-475 ◽  
pp. 2922-2925
Author(s):  
Xiao Ping Zhou ◽  
Xin Zhou ◽  
Ming Li
Keyword(s):  
Aluminum Alloy ◽  
Intermetallic Compounds ◽  
High Speed ◽  
Dynamic Recovery ◽  
High Speed Steel ◽  
Feed Speed ◽  
Friction Stir ◽  
Influence Area

The principle of the friction stir processed (FSP) was studied in this paper. When the rotate-speed of the mixing head is 3000r/min, as feed speed of the mixing head is 15μm / s and cutting output is 0.1mm,an influence area constituted with Fe-Al intermetallic compounds was produced between the coating of high-speed steel and Al substrate because of dynamic recovery and recrystallization.The Fe-Al intermetallic compounds can improve microhardness as hard strengthening phase.and the highest microhardness of the influence area achieved 600 HV.

scholarly journals Investigation of mechanical behavior of friction stir welded joints of AA6063 with AA5083 aluminum alloys

2019 ◽  
Vol 23 (1) ◽  
pp. 59-63 ◽  
Author(s):  
S. Dharani Kumar ◽  
S. Sendhil Kumar
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Mechanical Characteristics ◽  
High Speed Steel ◽  
Experimental Result ◽  
Work Piece ◽  
Maximum Hardness ◽  
Butt Weld ◽  
Friction Stir ◽  
Cylindrical Profile

Abstract Aluminum alloy finds its applications in various sectors of engineering. This paper discusses the investigation of mechanical characteristics of butt weld joints of aluminum alloy AA6063 along with AA5083. An experiment was conducted for different tool rotational speeds of 600 rpm, 800 rpm and 1000 rpm. Specifications of friction stir welding machine were 4 kN axial load and welding speed of 40 mm/min. Friction stir welded (FSW) joints of higher tensile strength, lower flexural strength and lower impact strength with maximum hardness, for the work piece fabricated at 1000 rpm using a high speed steel tool with a cylindrical profile was observed. Better understanding of the effect of tool rotational speed and mechanical properties was illustrated through the experimental result.

scholarly journals A Research on Friction Stir Welding using M42 Tool on Aisi 1018 Steel Plates

2019 ◽  
Vol 8 (12S) ◽  
pp. 362-366
Keyword(s):  
Friction Stir Welding ◽  
High Speed ◽  
High Speed Steel ◽  
Steel Plates ◽  
Milling Machine ◽  
Friction Stir ◽  
High Melting Temperature ◽  
Ferrous Material ◽  
Vertical Milling ◽  
Vertical Milling Machine

Friction Stir Welding was mainly suitable for aluminum alloys due to low softening temperatures. It is challenging to join the high melting temperature metals due to the lack of tool materials. The main focus of this work is to study the feasibility of joining the similar or dissimilar ferrous material. The molybdenum based high speed steel acts a rotating non consumable tool to weld the two ferrous plates. The friction stir welding was achieved using vertical milling machine. Welding samples were examined by destructive and nondestructive test. The welds were produced by 3 mm plate over a range of spindle speed from 500 to 1000 rpm. The results of FSW, stir zone of hardness varies from 139 to 145 HV executed on AISI 1018 plate steel.

A Study on Friction Stir Welding with Heating of Aluminum Alloy

2007 ◽  
Vol 353-358 ◽  
pp. 2041-2044
Author(s):  
Riichi Suzuki ◽  
Susumu Hioki ◽  
Naoki Yamamoto ◽  
Yuuta Kaneko ◽  
Takehiko Takahashi
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
High Speed ◽  
Room Temperature ◽  
High Efficiency ◽  
High Vacuum ◽  
Frictional Heat ◽  
Vacuum Vessel ◽  
Friction Stir

Conventional Friction Stir Welding (FSW) is that weld materials are joint at room temperature by stirring softened materials due to frictional heat of rotating tool. Therefore, high speed and high efficiency would be expected, as pre-heating make weld materials more softened, as well known that yield point goes lower due to heating. In this study, FSW was done to improve welding speed on FSW of aluminum alloy (A5052) for high vacuum vessel for processing of electronics devices. As the result, welding speed was 2.0 times to more than 3.0 at 300 oC comparing with conventional FSW at room temperature, using improved a milling machine with heater.

Modeling of Friction Stir Welding of AL7075 Using Neural Networks

2012 ◽  
Vol 3 (1) ◽  
pp. 66-79 ◽  
Author(s):  
Sasidhar Muttineni ◽  
Pandu R. Vundavilli
Keyword(s):  
Neural Network ◽  
Mechanical Properties ◽  
Neural Networks ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
High Speed ◽  
Welding Process ◽  
High Speed Steel ◽  
Operating Conditions ◽  
Friction Stir

Friction stir welding (FSW) is a solid state welding process, which is used for the welding of aluminum alloys. It is important to note that the mechanical properties of the FSW process depends on various process parameters, such as spindle speed, feed rate and shoulder depth. Two different tool materials, such as High speed steel (HSS) and H13 are considered for the welding of Al 7075. The present paper deals with the modeling of FSW process using neural networks. A three layered feed forward neural network (NN) has been used to model the FSW of aluminum alloys. It is important to note that the connection weights and bias values of the NN are optimized with the help of a binary coded genetic algorithm (GA). The training of the NN with the help of GA is a time consuming process. Hence, offline training has been provided to optimize the connection weights and bias values of the neural network. Once, the training is over, the GA trained neural network will be used for online prediction of the mechanical properties of FSW process at different operating conditions.

Optimization of Process Parameters for Friction Stirs Welding of Aluminium Alloy Al 6061

2015 ◽  
Vol 766-767 ◽  
pp. 721-726
Author(s):  
V. Abraham Boniface ◽  
A. Joseph Rijul Raj
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Aluminium Alloy ◽  
High Speed ◽  
Processing Condition ◽  
High Speed Steel ◽  
Dominant Factor ◽  
Al Alloy ◽  
Friction Stir ◽  
Alloy 6061

In the present method the effect of welding speed, axial force, tool rotational speed and shoulder penetration on the mechanical properties of Aluminium alloy 6061 butt joint produced by Friction Stir Welding (FSW) is analyzed. The mechanical behavior properties like Yield Strength, Tensile Strength and % of Elongation has been tested using 5 mm thick plate. The tool used for conducting the experiment was High Speed Steel (HSS). Tensile Strength, Yield Strength and Percentage of Elongation of FSW Al alloy 6061 has been evaluated under different processing condition using Taguchi’s design. The optimum results had been obtained using main effects plot using S/N ratio values. Tool rotation speed has been found dominant factor for Tensile Strength followed by feed and shoulder penetration. Shoulder diameter shows the minimal effect on Tensile Strength compared to other parameters.

Sign in / Sign up

Export Citation Format

Share Document