Effect of welding parameters on microstructure characteristics and fatigue properties of dissimilar joints prepared by linear friction welding on TC11 and TC17 titanium alloys

2020 ◽  
Vol 64 (4) ◽  
pp. 683-695 ◽  
Author(s):  
Jun Yang ◽  
Jinglong Li ◽  
Jiangtao Xiong ◽  
Jianghai Liao ◽  
Feng Jin
Keyword(s):  
Titanium Alloys ◽  
Friction Welding ◽  
Fatigue Properties ◽  
Welding Parameters ◽  
Linear Friction Welding ◽  
Dissimilar Joints ◽  
Microstructure Characteristics ◽  
Linear Friction

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 Joining of Dissimilar Alloys Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo-0.1Si Using Linear Friction Welding

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3664 ◽  
Author(s):  
Sidharth Rajan ◽  
Priti Wanjara ◽  
Javad Gholipour ◽  
Abu Syed Kabir
Keyword(s):  
Friction Welding ◽  
Weld Zone ◽  
Stress Relief ◽  
Valuable Insight ◽  
Linear Friction Welding ◽  
Dissimilar Joints ◽  
Dissimilar Welds ◽  
Dissimilar Alloys ◽  
Linear Friction ◽  
Static Tensile

Dissimilar joints between Ti-6Al-4V (Ti-64) and Ti-6Al-2Sn-4Zr-2Mo-0.1Si (Ti-6242) were manufactured using linear friction welding. The weld quality, in terms of the microstructure and mechanical properties, was investigated after stress relief annealing (SRA) at 750 °C for 2 h and compared with the as-welded (AWed) results. The central weld zone (CWZ) microstructure in the AWed condition consisted of recrystallized prior-β grains with α’ martensite, which transformed into an acicular α+β structure after SRA. The hardness in the AWed condition was highest in the CWZ and decreased sharply through the thermomechanically affected zones (TMAZ) to the parent materials (PMs). After SRA, the hardness of the CWZ decreased, mainly due to tempering of the α’ martensite microstructure. Static tensile testing of the dissimilar welds in both the AWed and stress relief annealed (SRAed) conditions resulted in ductile fracture occurring exclusively in the Ti-6Al-4V side of the joint. The promising results on joining of Ti-64 to Ti-6242 provide valuable insight for tailoring performance of next-generation aero-engine products.

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
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