scholarly journals Microstructure and Properties of an АА 2139 Alloy Welded Joint Produced by Linear Friction Welding

2015 ◽  
Vol 8 (6) ◽  
pp. 30-32
Author(s):  
S. K. Kiseleva ◽  
◽  
A. Y. Medvedev ◽  
V. M. Bychkov ◽  
B. O. Bolshakov ◽  
...  
Keyword(s):  
Friction Welding ◽  
Welded Joint ◽  
Linear Friction Welding ◽  
Microstructure And Properties ◽  
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.

scholarly journals Structure and properties of welded joint of a D16T alloy obtained by linear friction welding

2014 ◽  
Vol 4 (3) ◽  
pp. 186-189
Author(s):  
S. K. Kiseleva ◽  
Vas. V. Astanin ◽  
L. Y. Gareeva ◽  
M. V. Karavaeva ◽  
V. M. Bychkov ◽  
...  
Keyword(s):  
Friction Welding ◽  
Welded Joint ◽  
Structure And Properties ◽  
Linear Friction Welding ◽  
D16t Alloy ◽  
Linear Friction

scholarly journals Analysis of the Microstructure and Mechanical Properties during Inertia Friction Welding of the Near-α TA19 Titanium Alloy

2020 ◽  
Vol 33 (1) ◽  
Author(s):  
Yanquan Wu ◽  
Chunbo Zhang ◽  
Jun Zhou ◽  
Wu Liang ◽  
Yunlei Li
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
High Temperature ◽  
Base Metal ◽  
Friction Welding ◽  
Welded Joint ◽  
Weld Zone ◽  
Linear Friction Welding ◽  
Β Phase ◽  
Linear Friction

AbstractThe current research of titanium alloy on friction welding process in the field of aero-engines mainly focuses on the linear friction welding. Compared to the linear friction welding, inertial friction welding of titanium alloy still has important application position in the welding of aero-engine rotating assembly. However, up to now, few reports on inertial friction welding of titanium alloy are found. In this paper, the near-alpha TA19 titanium alloy welded joint was successfully obtained by inertial friction welding (IFW) process. The microstructures and mechanical properties were investigated systematically. Results showed that the refined grains within 15‒20 μm and weak texture were found in the weld zone due to dynamic recrystallization caused by high temperature and plastic deformation. The weld zone consisted of acicular α′ martensite phase, αp phase and metastable β phase. Most lath-shaped αs and β phase in base metal were transformed into acicular martensite α′ phase and metastable β phase in thermo-mechanically affected zone and heat affected zone. As a result, the microhardness of welded joint gradually decreased from the weld zone to the base metal. Tensile specimens in room temperature and high temperature of 480 °C were all fractured in base metal illustrating that the inertia friction welded TA19 titanium alloy joint owned higher tensile strength compared to the base metal.

Effect of Process Parameters on Welding Variables during Linear Friction Welding of Ti-6Al-4V Alloy

2011 ◽  
Vol 314-316 ◽  
pp. 979-983
Author(s):  
Tie Jun Ma ◽  
Xi Chen ◽  
Wen Ya Li
Keyword(s):  
Titanium Alloy ◽  
Process Parameters ◽  
Friction Welding ◽  
Welding Process ◽  
Orthogonal Experimental Design ◽  
Linear Friction Welding ◽  
Influence Of Process Parameters ◽  
Linear Friction ◽  
Suitable Process ◽  
Axial Shortening

The orthogonal experimental design was conducted for linear friction welding of Ti-6Al-4V titanium alloy (TC4). The friction power and joint temperature were collected during the welding process. The influence of process parameters on the axial shortening was analyzed. The suitable process parameters were determined by investigating the joint appearance, the requirement of axial shortening and welding variables during welding. The results provide important reference for establishing process parameters of linear friction welding in practice.

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