scholarly journals Laser Ablation of Titanium Alloy (Ti64): Effects of Process Parameters on Performance of Laser Welded Ti64 – Polyamide 6.6 Joints.

2021 ◽  
Author(s):  
Adham Al-Sayyad ◽  
Farah Salah ◽  
Julien Bardon ◽  
Pierre Hirchenhahn ◽  
Lamia Shihata ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Ablation ◽  
Titanium Surface ◽  
Process Window ◽  
Welding Quality ◽  
Optimal Parameters ◽  
Joint Resistance ◽  
Polyamide 6.6 ◽  
Joining Process ◽  
Metal Polymer

Abstract Laser welding of metals – polymers has gained strong scientific and industrial interest because of its ability to produce miniaturized joints in lightweight products with customized properties. Surface pretreatments before joining process have shown significant impact on enhancing properties of laser welded metal – polymer joints. This work adopts a Design of Experiments (DoE) approach to investigate the influence of titanium alloy (Ti64) laser ablation parameters on the performance of laser welded Ti64 – polyamide (PA6.6) assemblies. In this first study, significant laser ablation parameters were highlighted, process window outlined, and optimal parameters identified. Laser ablation pretreatment parameters demonstrated a strong influence on joint resistance to failure. Effects of laser ablation parameters on titanium surface morphology were analyzed using Scanning Electron Microscope (SEM). In a second study, the effects of ablation parameters on Ti64 surface properties and welding quality will be investigated.

Formation of titanium carbide on the titanium surface using laser ablation in n-heptane and investigating its corrosion resistance

2019 ◽  
Vol 478 ◽  
pp. 623-635 ◽  
Author(s):  
Behnaz Feizi Mohazzab ◽  
Babak Jaleh ◽  
Omidreza Kakuee ◽  
Arash Fattah-alhosseini
Keyword(s):  
Corrosion Resistance ◽  
Laser Ablation ◽  
Titanium Carbide ◽  
Titanium Surface

Effect of liquid environment on the titanium surface modification by laser ablation

2017 ◽  
Vol 405 ◽  
pp. 298-307 ◽  
Author(s):  
Nisar Ali ◽  
Shazia Bashir ◽  
Umm-i-Kalsoom ◽  
Narjis Begum ◽  
Muhammad Shahid Rafique ◽  
...  
Keyword(s):  
Surface Modification ◽  
Laser Ablation ◽  
Titanium Surface ◽  
Liquid Environment

FEM Modeling of Self-Piercing Riveted Joint

2007 ◽  
Vol 344 ◽  
pp. 655-662 ◽  
Author(s):  
Eleonora Atzeni ◽  
Rosolino Ippolito ◽  
Luca Settineri
Keyword(s):  
Failure Mechanisms ◽  
Numerical Results ◽  
Efficient Design ◽  
Shear Tests ◽  
Fem Modeling ◽  
Riveted Joint ◽  
Joint Resistance ◽  
Real Geometry ◽  
Riveting Process ◽  
Joining Process

The present paper aims at defining a numerical tool for the efficient design of the selfpiercing riveting process by means of FE simulations. Abaqus Explicit v.6.4 software has been used to establish a model for 3D simulation of the joining process and of the shearing test on the riveted joint, in order to understand the joint formation and failure mechanisms. The obtained indications have been validated experimentally through joint sectioning and comparison between real geometry and numerical results. Furthermore, shear tests have been performed to compare the experimental and numerical results in terms of joint resistance.

Comparative Analysis of Forging Rolling and Cross-Wedge Rolling of Forgings from Titanium Alloy Ti6Al4V

2016 ◽  
Vol 687 ◽  
pp. 141-148 ◽  
Author(s):  
Arkadiusz Tofil ◽  
Janusz Tomczak ◽  
Tomasz Bulzak
Keyword(s):  
Titanium Alloy ◽  
Numerical Simulations ◽  
Complex Analysis ◽  
Stable Process ◽  
Rolling Process ◽  
Optimal Parameters ◽  
Cross Wedge Rolling ◽  
Theoretical Assumptions ◽  
Titanium Alloy Ti6al4v

Theoretical-experimental results of forging rolling and cross-wedge rolling of stepped shafts forgings from titanium alloy Ti6Al4V are presented in this paper. Theoretical assumptions were based on the results of numerical simulations conducted by means of finite element method with the application of software Simufact Forming. During numerical simulations optimal parameters of the rolling processes were determined in view to possibility of obtaining forgings of assumed quality and stable process course. Experimental verification was conducted in universal forging rolling mill of own design, which allows for realization of such processes as splitting without waste, forging rolling and cross as well as cross-wedge rolling processes. During conducted research influence of the way of rolling on the obtained parts quality and the process force parameters were determined. Complex analysis of the chosen rolling parameters impact on the rolling process course and quality of finished products was made. Conducted research showed that it is possible to roll axi-symmetrical forgings of stepped shafts both in transverse and longitudinal arrangement. However, forgings rolled crosswise are characterized by larger precision than in comparison with semi-finished products in longitudinal arrangement.

scholarly journals LOCAL ALLOYING OF TITANIUM COPPER

2020 ◽  
pp. 12-16
Author(s):  
V. Shmorgun ◽  
O. Slautin ◽  
A. Serov ◽  
R. Novikov
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Surface Layer ◽  
Phase Composition ◽  
Intermetallic Compounds ◽  
Laser Processing ◽  
Titanium Surface ◽  
Explosion Welding ◽  
Copper Plating ◽  
Fixed Abrasive

The influence of the parameters of laser processing of copper plating deposited by explosion welding and subsequent rolling on the titanium surface on the structure and phase composition of the coatings is studied. It is shown that alloying titanium with copper leads to the formation of intermetallic compounds (titanium cuprides) in the remelting zone, which contributes to a significant increase in the wear resistance of the surface layer. When tested for wear on a fixed abrasive, the wear resistance of the coating is 2 times higher than that of VT1-0 titanium alloy.

Joining by Upset Bulging at Elevated Temperatures

2016 ◽  
Vol 1140 ◽  
pp. 115-122 ◽  
Author(s):  
Amer Almohallami ◽  
Michael Rusch ◽  
Milan Vucetic ◽  
Anas Bouguecha ◽  
Markus Bambach ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Local Heating ◽  
Industrial Applications ◽  
Process Window ◽  
Fe Model ◽  
A Minor ◽  
Free Bulging ◽  
Joining Process ◽  
Minor Extent ◽  
Process Material

Due to the limitations of other processes in joining different types of material, mechanical joining methods can be alternatively used. Joining by upset bulging can be employed for joining tubes with other structures such as sheets, plates, tubes or profiles as well as for joining different materials. In spite of successful industrial applications of this joining process, material damage is still a challenge. This damage affects the resistance of the created joint to service loads. Thus, in this paper, a local heating is studied, which aims at avoiding pre-damage or failure of the joint. A parametric FE model is developed to analyse the influence of local heating on the bulging process. It is found that the process window set by the bulge length suitable for joining is widened, but only to a minor extent. The marginal influence of local heating on the bulge geometry allows designing the process in the same way as room temperature processes. Metallographic investigations confirm the damage-free bulging of tubes by forming at elevated temperatures. Another important result is that tubes can be equipped with predefined bulge zones by local heating zones to 700 °C for 15 seconds for example. This enables bulging of tubes during joining by applying an axial load only, without using tools to define the location of the bulge or its length, thus enabling joining operations with limited access.

P-09 laser ablation performance of double glow discharge sputter deposition Mo on titanium alloy surface

2011 ◽  
Vol 9 (s1) ◽  
pp. s10704-310707
Author(s):  
Shunqi Zhang Shunqi Zhang ◽  
Gaohui Zhang Gaohui Zhang ◽  
Guoqing Huang Guoqing Huang ◽  
Pinze Zhang Pinze Zhang ◽  
Peng Xu Peng Xu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Ablation ◽  
Glow Discharge ◽  
Sputter Deposition ◽  
Alloy Surface

Analysis of Plasma Created by High-Speed Impact with Triple Probe

2016 ◽  
Vol 715 ◽  
pp. 95-100
Author(s):  
Koki Umeda ◽  
Takanari Sakai ◽  
Keiko Watanabe ◽  
Gregory Kennedy ◽  
Naresh Thadhani
Keyword(s):  
Laser Ablation ◽  
High Speed ◽  
Plasma Plume ◽  
Optimal Parameters ◽  
Destruction Process ◽  
Black Paint ◽  
Temperature Changes ◽  
High Speed Impact ◽  
Fundamental Wavelength ◽  
The Impact

The mechanism of destruction of a material by high-speed impact is known to be complex, and it is hard to analyze the inner state of the material during the destruction process. In particular, it is difficult to measure the temperature changes within a material during a high-speed impact. In this study, we propose a new method for estimating this temperature change by measuring the plasma produced at the impact point using a triple probe. A plasma produced by laser ablation was measured to ascertain that the triple probe actually worked. Further, some of the parameters related to the triple probe were varied, and the obtained results were compared, in order to determine the optimal parameters for measuring plasmas. A pulsed Nd-YAG laser with a fundamental wavelength of 1064 nm was employed to produce laser ablation. The laser was irradiated on a thin A2024 plate coated with a black paint. The expanding plasma plume was recorded with a high-speed camera, and the signal from the plasma was measured with the triple probe.

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