Creep Behavior of Fusion Zone and Base Metal of the Electron Beam Weldments of a Near-alpha Titanium Alloy

2010 ◽  
Vol 26 (6) ◽  
pp. 564-571 ◽  
Author(s):  
Zhiyong Chen ◽  
Jinwei Li ◽  
Jie Liu ◽  
Qingjiang Wang ◽  
Jianrong Liu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Fusion Zone ◽  
Base Metal ◽  
Creep Behavior ◽  
Alpha Titanium

Microstructural Characterization and Tensile Behavior of TA1 Titanium Alloy Sheet Welded by Electron Beam Welding

2021 ◽  
Vol 1027 ◽  
pp. 149-154
Author(s):  
Sen Dong Gu ◽  
Ji Peng Zhao ◽  
Rui Jie Ouyang ◽  
Yong Hong Zhang
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Fusion Zone ◽  
Heat Affected Zone ◽  
Electron Beam Welding ◽  
Base Material ◽  
Optical Microscope ◽  
Alloy Sheet ◽  
Tensile Behavior ◽  
Electron Backscattered Diffraction

In the present study, TA1 titanium alloy sheets with a thickness of 0.8mm were welded by electron beam welding. Microstructure of the welded region was investigated using optical microscope and electron backscattered diffraction. Then, the tensile test was conducted to analyse the tensile behavior of the welded sheets as well as the fractography of the fracture surfaces. It is shown that the mean grain size in the heat-affected zone is smaller than that in the fusion zone and base material. The strength of the base metal is lower than that of the fusion zone and heat-affected zone. The average values of the yield strength, tensile strength and elongation of the tensile specimens are 224MPa, 335MPa and 35%, respectively. In addition, the tensile specimens of the welded sheets suffer both ductile and brittle deformation during the tensile tests.

Forming Process during Electron Beam Surfi-SculptTM on Ti-6Al-4V Alloy

2019 ◽  
Vol 813 ◽  
pp. 25-30
Author(s):  
Kai Li ◽  
Peng Fei Fu ◽  
Zhen Yun Tang ◽  
Bo Zhang ◽  
Yan Long Ma ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fusion Zone ◽  
Base Metal ◽  
Heat Affected Zone ◽  
Surface Region ◽  
Martensite Phase ◽  
Treatment Technique ◽  
Layer By Layer ◽  
Forming Process ◽  
Near Surface

Electron beam Surfi-SculptTM is a novel surface treatment technique applied to produce high level performance Composite-Metal-Weld (ComeldTM) joints. Investigation on forming process during electron beam Surfi-SculptTM on Ti-6Al-4V alloy showed protrusions were formed via a layer-by-layer mode like additive manufacturing process. The near-surface region of electron beam Surfi-Sculpted Ti-6Al-4V alloy was occupied by fusion zone, heat-affected zone and base metal from the outermost surface to the underlying bulk alloy. The microstructure of fusion zone was characterized by a high density of fine acicular martensite phase, leading to a higher micro-hardness. A heat-affected zone was sandwiched between fusion zone and the underlying base metal, with different microstructural features compared to both fusion zone and the base metal.

Effect of base metal and welding speed on fusion zone microstructure and HAZ hot-cracking of electron-beam welded Inconel 718

2016 ◽  
Vol 89 ◽  
pp. 964-977 ◽  
Author(s):  
Yunpeng Mei ◽  
Yongchang Liu ◽  
Chenxi Liu ◽  
Chong Li ◽  
Liming Yu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fusion Zone ◽  
Base Metal ◽  
Welding Speed ◽  
Inconel 718 ◽  
Hot Cracking ◽  
Zone Microstructure

scholarly journals Influence of Welded Pores on Very Long-Life Fatigue Failure of the Electron Beam Welding Joint of TC17 Titanium Alloy

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1825 ◽  
Author(s):  
Fulin Liu ◽  
Hong Zhang ◽  
Hanqing Liu ◽  
Yao Chen ◽  
Khan Muhammad Kashif ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Fatigue Life ◽  
Base Metal ◽  
Fatigue Failure ◽  
Electron Beam Welding ◽  
Welded Joint ◽  
Fatigue Cracks ◽  
Failure Behavior ◽  
Long Life

The electron beam welding process is widely used in the connection among titanium alloy material parts of aero-engines. Its mechanical properties need to meet the requirements of long life and high reliability. In this paper, the static strength and the fatigue failure behavior of the electron beam weldments of TC17 titanium alloy were investigated experimentally under low amplitude high frequency (20 kHz), and the mechanical response and failure mechanism under different external loading conditions were analyzed. In summary, the samples were found to have anisotropic microstructure. The tensile strength of the PWHT of TC17 EBW joint was ~4.5% lower than that of the base metal. Meanwhile, compared with the base metal, the fatigue strength was reduced by 45.5% at 109 cycles of fatigue life. The fracture analysis showed that the fatigue failure of the welded joint of TC17 alloy was caused by the welded pores and the fatigue cracks initiated from the welded pores. A fine granular area (FGA) was observed around the crack initiation region. The existence of pores caused the stress intensity factor of the fine granular area (KFGA) to be inversely proportional to the fatigue life. The KFGA calculation formula was modified and the fatigue crack propagation threshold of the welded joint of TC17 alloy was calculated (3.62 MPa·m1/2). Moreover, the influences of the effective size and the relative depth of the pores on the very long fatigue life of the electron beam welded joint of TC17 titanium alloy were discussed.

scholarly journals Characterization of the Mechanical Behaviour of Both Fusion Zone and Base Metal of Electron Beam Welded TA6V Titanium Alloy

2010 ◽  
Vol 654-656 ◽  
pp. 890-893 ◽  
Author(s):  
Julitte Huez ◽  
Christophe Buirette ◽  
Eric Andrieu ◽  
Simon Perusin ◽  
Sylvain Audion
Keyword(s):  
Heat Treatment ◽  
Electron Beam ◽  
Fusion Zone ◽  
Base Metal ◽  
Mechanical Behaviour ◽  
Damage Mechanism ◽  
Post Weld Heat Treatment ◽  
Fatigue Properties ◽  
Local Difference

The fusion zone of an electron beam welded Ti-6Al-4V alloy presents a ' martensitic structure which leads to a change of mechanical properties. Starting from two manufacturing processing routes for the alloy (1) a  processing followed by the weld (the reference microstructure), (2) an  processing followed by welding and a post weld heat treatment (PWHT), the microstructure can be adjusted to avoid local difference of strength, fatigue properties and impact toughness. This results from the optimisation of the process and of the PWHT. The present work investigates the mechanical behaviour and the damage mechanism of both base metal and fusion zone in regards to the microstructure and to the heat treatment parameters.

Effect of Electron Beam Welding on Microstructure and Mechanical Properties of Spray-Deposited Al-Zn-Mg-Cu Alloy

2013 ◽  
Vol 302 ◽  
pp. 230-235
Author(s):  
Feng Wang ◽  
Yu Ting Zuo ◽  
Bai Qing Xiong ◽  
Yon Gan Zhang ◽  
Hong Wei Liu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fusion Zone ◽  
Base Metal ◽  
Heat Affected Zone ◽  
Electron Beam Welding ◽  
Spray Atomization ◽  
Test Results ◽  
Cu Alloy ◽  
Equiaxed Grains ◽  
Strengthening Phases

In this study, Al-8.6Zn-2.6Mg-2.2Cu (wt,%) alloy was synthesized by the spray atomization and deposition technique. Electron beam welding (EBW) joint in the spray-deposited Al-8.6Zn-2.6Mg-2.2Cu alloy is composed of fusion zone, heat affected zone and base metal region. The microstructure of the fusion zone has been found to be very fine equiaxed grains, and the microstructure of the heat affected zone is mainly composed of α-Al and Al/MgZn2 eutectic microstructure. Extensive microhardness measurements were conducted in the weld regions of the nuggets exhibited a hardness loss in the fusion zone due to the loss of strengthening phases. Tensile properties test results indicated that tensile strength of these welds approached 82.3~85.3% of the base metal. The analysis of fracture surface has confirmed that the specimen fractured within the weld region during tensile test.

Studies on fusion zone fracture behaviour of electron beam welds of an α+β-titanium alloy

1996 ◽  
Vol 31 (14) ◽  
pp. 3769-3775 ◽  
Author(s):  
T. Mohandas ◽  
D. Banerjee ◽  
Y. R. Mahajan ◽  
V. V. Kutumba Rao
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Fusion Zone ◽  
Fracture Behaviour
Sign in / Sign up

Export Citation Format

Share Document