Microstructure evolution during linear friction welding of dissimilar titanium alloys TC4 and TC17

2022 ◽  
Author(s):  
He Ma ◽  
Ju Li ◽  
Bohao Tao ◽  
Chuanchuan Chang ◽  
Yanhua Zhang
Keyword(s):  
Titanium Alloys ◽  
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 two-phase titanium alloys VT6 and VT8-1

2014 ◽  
Vol 29 (1) ◽  
pp. 66-69 ◽  
Author(s):  
A.Yu. Medvedev ◽  
V.M. Bychkov ◽  
A.S. Selivanov ◽  
S.P. Pavlinich ◽  
S.Kh. Dautov ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
Friction Welding ◽  
Linear Friction Welding ◽  
Two Phase ◽  
Linear Friction

scholarly journals MODELING OF TITANIUM ALLOYS PLASTIC FLOW IN LINEAR FRICTION WELDING

2021 ◽  
Vol 19 (1) ◽  
pp. 091
Author(s):  
Vladimir A. Skripnyak ◽  
Kristina Iokhim ◽  
Evgeniya Skripnyak ◽  
Vladimir V. Skripnyak
Keyword(s):  
Plastic Deformation ◽  
Titanium Alloys ◽  
Plastic Flow ◽  
Friction Welding ◽  
Welded Joint ◽  
High Tech ◽  
Structural Elements ◽  
Linear Friction Welding ◽  
Near Surface ◽  
Linear Friction

The article presents the results of the analysis of the plastic flow of titanium alloys in the process of the Linear Friction Welding (LFW). LFW is a high-tech process for joining critical structural elements of aerospace engineering from light and high-temperature alloys. Experimental studies of LFW modes of such alloys are expensive and technically difficult. Numerical simulation was carried out for understanding the physics of the LFW process and the formation laws of a strong welded joint of titanium alloys. Simulation by the SPH method was performed using the LS DYNA software package (ANSYS WB 15.2) and the developed module for the constitutive equation. The new coupled thermomechanical 3D model of LFW process for joining structural elements from alpha and alpha + beta titanium alloys was proposed. It was shown that the formation of a welded joint occurs in a complex and unsteady stress-strain state. In the near-surface layers of the bodies being welded, titanium alloys can be deformed in the mode of severe plastic deformation. A deviation of the symmetry plane of the plastic deformation zone from the initial position of the contact plane of the bodies being welded occurs during a process of LFW. Extrusion of material from the welded joint zone in the transverse direction with respect to the movement of bodies is caused by a pressure gradient and a decrease in the alloy flow stress due to heating. The hcp-bcc phase transition of titanium alloys upon heating in the LFW process necessitates an increase in the cyclic loading time to obtain a welded joint.

FEM simulation of the linear friction welding of titanium alloys

2010 ◽  
Vol 48 (4) ◽  
pp. 749-758 ◽  
Author(s):  
J. Sorina-Müller ◽  
M. Rettenmayr ◽  
D. Schneefeld ◽  
O. Roder ◽  
W. Fried
Keyword(s):  
Titanium Alloys ◽  
Friction Welding ◽  
Fem Simulation ◽  
Linear Friction Welding ◽  
Linear Friction

scholarly journals Linear friction welding of dissimilar Ni-based superalloys: microstructure evolution and thermo-mechanical interaction

2021 ◽  
Vol 11 ◽  
pp. 633-649
Author(s):  
Peihao Geng ◽  
Guoliang Qin ◽  
Hong Ma ◽  
Jun Zhou ◽  
Ninshu Ma
Keyword(s):  
Microstructure Evolution ◽  
Friction Welding ◽  
Linear Friction Welding ◽  
Mechanical Interaction ◽  
Linear Friction

Microstructure evolution in a single crystal nickel-based superalloy joint by linear friction welding

2015 ◽  
Vol 85 ◽  
pp. 613-617 ◽  
Author(s):  
Tiejun Ma ◽  
Ming Yan ◽  
Xiawei Yang ◽  
Wenya Li ◽  
Y.J. Chao
Keyword(s):  
Single Crystal ◽  
Microstructure Evolution ◽  
Friction Welding ◽  
Linear Friction Welding ◽  
Nickel Based Superalloy ◽  
Linear Friction
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