ESTIMATION OF THE MECHANICAL PROPERTIES OF WELDED JOINTS OF VT6Ch TITANIUM ALLOY OBTAINED BY THE METHOD OF ELECTRON BEAM WELDING

2017 ◽  
Vol 83 (12) ◽  
pp. 48-51
Author(s):  
V. S. Erasov ◽  
N. A. Nochovnaya ◽  
A. V. Lavrov ◽  
M. S. Gribkov
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Electron Beam ◽  
Welded Joints ◽  
Electron Beam Welding

Investigation on the microstructure and mechanical properties of Ti6Al4V titanium alloy electron beam welding joint

2022 ◽  
pp. 095440622110329
Author(s):  
Xilong Zhao ◽  
Xinhong Lu ◽  
Kun Wang ◽  
Feng He
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Electron Beam ◽  
Penetration Depth ◽  
Welding Speed ◽  
Welded Joints ◽  
Electron Beam Welding ◽  
Martensite Phase ◽  
Ti6al4v Titanium Alloy ◽  
Microstructure And Mechanical Properties

Electron beam welding (EBW) is a fusion joining process particularly suitable for welding titanium plates. In the present work, 2.5 mm thickness Ti6Al4V titanium alloy plates were butt-welded together with backing plates by EBW. The detailed procedures of experiments were used to investigate the microstructure and mechanical properties of welded joints. The optimum welding speed was determined by microstructure examinations, microhardness tests, X-Ray diffraction tests, shear punch tests (SPT) and stress simulation calculations. The results showed that all microstructure of welded metal (WM) was martensite phase under the different welding speeds. In the heat-affected zone (HAZ), the martensite phase gradually evolved to be small and equiaxed. It can be seen that the microstructure of each region in welded joints did not change significantly. When the welding speed is between 8 mm/s and 14 mm/s, it can be seen from the macroscopic appearance of the joints that there was no utterly fused penetration between the butt plate and substrate. Finite element simulation was carried out for the no-penetration depth under different welding conditions, and it was found that the stress suffered by the small no-penetration depth was the smallest. Using different welding parameters shows that the engineering stress in WM was higher than other areas, and BM was the lowest. As welding speed increases from 8 mm/s to 14 mm/s, the variation of microhardness distribution was not evident.

scholarly journals Microstructure and Mechanical Properties of Electron Beam-Welded Joints of Titanium TC4 (Ti-6Al-4V) and Kovar (Fe-29Ni-17Co) Alloys with Cu/Nb Multi-Interlayer

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Yong-jian Fang ◽  
Xiao-song Jiang ◽  
De-feng Mo ◽  
Ting-feng Song ◽  
Zhen-yi Shao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Tensile Strength ◽  
Titanium Alloy ◽  
Electron Beam ◽  
Welded Joints ◽  
Electron Beam Welding ◽  
Weld Zone ◽  
X Ray Diffraction ◽  
Strength Tests

Electron beam welding of a titanium alloy (Ti-6Al-4V) and a kovar alloy (Fe-29Ni-17Co) was performed by using a Cu/Nb multi-interlayer between them. Microstructure and composition of welded joints were analyzed by means of optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Mechanical properties of welded joints were evaluated by microhardness and tensile strength tests. Results indicated that in case of 0.22 mm thickness of Nb foil, microstructure of the titanium alloy side was mainly composed of Ti solid solution and some intermetallic compounds such as FeTi and CuTi2, whereas in case of 0.40 mm thickness of Nb foil, the appearance of weld was more uniform and hardness of the weld zone decreased sharply. However, tensile strength of welded joints was increased from 88.1 MPa for the 0.22 mm Nb foil to 150 MPa for the 0.40 mm Nb foil. It was found that thicker Nb foil could inhibit diffusion of Fe atoms towards the titanium alloy side, thus promoting the formation of Ti solid solution and a small amount of CuTi2 and eliminating FeTi. In addition, in both cases, Cu0.5Fe0.5Ti was found in the fusion zone of the titanium alloy side, which had an adverse effect on mechanical properties of welded joints.

scholarly journals Application of Dynamic Beam Positioning for Creating Specified Structures and Properties of Welded Joints in Electron-Beam Welding

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2233
Author(s):  
Tatyana Olshanskaya ◽  
Vladimir Belenkiy ◽  
Elena Fedoseeva ◽  
Elena Koleva ◽  
Dmitriy Trushnikov
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Weld Metal ◽  
Thermal Effect ◽  
Welded Joints ◽  
Electron Beam Welding ◽  
Welded Joint ◽  
Parent Metal ◽  
Cooling Rates ◽  
Structures And Properties

The application of electron beam sweep makes it possible to carry out multifocal and multi-beam welding, as well as combine the welding process with local heating or subsequent heat treatment, which is important when preparing products from thermally-hardened materials. This paper presents a method of electron beam welding (EBW) with dynamic beam positioning and its experimental-calculation results regarding the formation of structures and properties of heat-resistant steel welded joints (grade of steel 20Cr3MoWV). The application of electron beam oscillations in welding makes it possible to change the shape and dimensions of welding pool. It also affects the crystallization and formation of a primary structure. It has been established that EBW with dynamic beam positioning increases the weld metal residence time and the thermal effect zone above the critical A3 point, increases cooling time and considerably reduces instantaneous cooling rates as compared to welding without beam sweep. Also, the difference between cooling rates in the depth of a welded joint considerably reduces the degree of structural non-uniformity. A bainitic–martensitic structure is formed in the weld metal and the thermal effect zone throughout the whole depth of fusion. As a result of this structure, the level of mechanical properties of a welded joint produced from EBW with dynamic electron beam positioning approaches that of parent metal to a greater extent than in the case of welding by a static beam. As a consequence, welding of heat-resistant steels reduces the degree of non-uniformity of mechanical properties in the depth of welded joints, as well as decreases the level of hardening of a welded joint in relation to parent metal.

Effect of thermal cycles in electron beam welding of aluminium 1570 alloy on mechanical properties of welded joints

2021 ◽  
Vol 2021 (5) ◽  
pp. 35-40
Author(s):  
V.M. Nesterenkov ◽  
◽  
V.V. Skryabinskyi ◽  
M.O. Rusynyk ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Welded Joints ◽  
Electron Beam Welding ◽  
Thermal Cycles

Electron beam welding and heat treatment of welded joints of high-strength pseudo-β titanium alloy VT19

2018 ◽  
Vol 2018 (7) ◽  
pp. 10-14 ◽  
Author(s):  
S.V. Akhonin ◽  
◽  
V.Yu. Belous ◽  
R.V. Selin ◽  
E.L. Vrzhyzhevsky ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Electron Beam ◽  
Welded Joints ◽  
Electron Beam Welding ◽  
High Strength

Electron Beam Welding of Aluminium Alloy AW2099

2020 ◽  
Vol 994 ◽  
pp. 28-35
Author(s):  
Ján Urminský ◽  
Milan Marônek ◽  
Jozef Bárta ◽  
Martin Sahul ◽  
František Jurina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Welded Joints ◽  
Electron Beam Welding ◽  
Hardness Measurement ◽  
Metallographic Analysis ◽  
Fusion Boundary ◽  
Lithium Alloy ◽  
Static Tensile ◽  
Lithium Alloys

The paper deals with the analysis of mechanical properties of welded joints made of AW 2099 aluminium-lithium alloy by electron beam welding. The thickness of the experimental material was 3±0.2 mm. PZ EZ 30 STU electron beam welding machine was used for production of welds. Maximum accelerating voltage used within this study was 55 kV. Metallographic analysis, hardness measurement test and static tensile were carried out. The structure of the weld joint of aluminium-lithium alloy was investigated. Produced welded joints were characterized by the presence of following zones: heat affected zone (HAZ), equiaxed non-dendritic zone (EQZ), columnar dendritic zone (CDZ) and equiaxed dendritic zone (EDZ). EQZ grains were formed due to heterogeneous nucleation on precipitates at the fusion boundary. EQZ is typical for joining of aluminium lithium alloys.

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