Linear friction welding of a solid-solution strengthened Ni-based superalloy: Microstructure evolution and mechanical properties studies

2018 ◽  
Vol 34 ◽  
pp. 442-450 ◽  
Author(s):  
T.J. Ma ◽  
L.F. Tang ◽  
W.Y. Li ◽  
Y. Zhang ◽  
Y. Xiao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Microstructure Evolution ◽  
Friction Welding ◽  
Linear Friction Welding ◽  
Linear Friction

scholarly journals Experimental and Numerical Analysis of Microstructure Evolution during Linear Friction Welding of Ti6Al4V

2015 ◽  
Vol 1 ◽  
pp. 429-441 ◽  
Author(s):  
Gianluca Buffa ◽  
Davide Campanella ◽  
Marco Cammalleri ◽  
Antonino Ducato ◽  
Antonello Astarita ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Microstructure Evolution ◽  
Friction Welding ◽  
Linear Friction Welding ◽  
Linear Friction

Linear Friction Welding of IN-718 Process Optimization and Microstructure Evolution

2006 ◽  
Vol 15-17 ◽  
pp. 357-362 ◽  
Author(s):  
Caroline Mary ◽  
Mohammad Jahazi
Keyword(s):  
Process Parameters ◽  
Microstructure Evolution ◽  
Friction Welding ◽  
Welding Process ◽  
Weld Interface ◽  
Maximum Temperature ◽  
Linear Friction Welding ◽  
Influence Of Process Parameters ◽  
Linear Friction ◽  
The Matrix

Linear Friction Welding (LFW) of IN-718 Superalloy was investigated under several processing conditions. The influence of process parameters such as frequency (60Hz to 100Hz), amplitude (2mm to 3mm) and frictional pressure (50MPa to 110MPa) on the microstructure and mechanical properties of welded specimens was determined. Optical and scanning electron microscopy, and micro-hardness testing were used to characterize the welded areas as well as the Thermo-Mechanically Affected Zones (TMAZ). In-situ thermocouple measurements were performed to follow temperature evolution in the specimens during the different phases of the LFW process. The analysis of the results indicated that for some specific conditions (f=80Hz, a=2mm and P=70MPa) a maximum temperature of 1200°C was attained during the last stage of the welding process, the burn-off phase. This temperature, very close to the alloy melting range, would be sufficient to cause partial liquation in this zone. Microscopic examinations revealed the presence of oxide particles aligned around the weld interface. Their concentration and distribution, varying with process parameters, affect the weld integrity. The TMAZ characterised by a global loss of strength (from 334HV to 250HV) is associated with temperatures exceeding 800°C and causing γ’ and γ’’ reversion. A narrow band of the TMAZ, exposed to high strains and temperatures, showed evidences of dynamic recovery and recrystallization (up to 67% of reduction in the matrix grain size). Visual and microscopic examination of the flash layer, revealed two distinct zones. Microstructure evolution and microhardness variations were associated to process parameters and the optimum conditions for obtaining defect free weldments were determined.

Linear Friction Welding of a Commercial Aluminum Alloy

2016 ◽  
Vol 870 ◽  
pp. 608-613
Author(s):  
F.F. Musin ◽  
A.Y. Medvedev ◽  
B.O. Bolshakov
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Friction Welding ◽  
Solid Phase ◽  
Ingot Metallurgy ◽  
Linear Friction Welding ◽  
Welding Joint ◽  
Microstructure Transformation ◽  
Linear Friction ◽  
Phase Compound

The mechanical properties and microstructure of a solid-phase compound produced by linear friction welding (LFW) of commercial Al-4.4%Cu-0.5%Mg-0.4%Mn-0.5%Ag alloy have been studied. The samples of Al-Cu-Mg-Ag alloy were produced by ingot metallurgy and subjected to thermomechanical treatment to get different initial microstructures. It has been shown that the LFW of two rectangular-shaped samples with different microstructures enabled forming a well-done welding joint without macroscopic defects. The LFW samples have shown high mechanical properties. Strength has reached 452 MPa, and plasticity has become not less 15%. The microstructure transformation in the welding joint during plastic deformation and deformation heating at LFW is discussed.

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