Structure of Titanium GRADE 1 after Laser Alloying with FeCr Powder

2020 ◽  
Vol 308 ◽  
pp. 157-170
Author(s):  
Maciej Wiśniowski ◽  
Tomasz Tański ◽  
Przemysław Snopiński
Keyword(s):  
Laser Beam ◽  
Nickel Powder ◽  
Beam Power ◽  
Laser Alloying ◽  
Surface Alloying ◽  
Laser Beam Power ◽  
Iron Nickel ◽  
Titanium Grade ◽  
Power Diode ◽  
High Power Diode Laser

Titanium alloys due to their low density and high mechanical properties are a group of materials that are being used willingly nowadays. A promising method of titanium heat treatment is laser surface alloying. Process parameters like laser beam power, its transverse speed, amount of alloying elements and shield gas, have influence on the material. Different chemical composition and morphology can be achieved resulting in a change of properties on the surface of the material. The paper presents the investigation of titanium GRADE 1 processed with iron‐nickel powder using laser alloying. The treatment was performed using a high power diode laser. Different laser beam power values were used.

The effect of laser treatment parameters on temperature distribution and thickness of laser-alloyed layers produced on Nimonic 80A-alloy

2017 ◽  
Vol 2 (83) ◽  
pp. 67-78 ◽  
Author(s):  
N. Makuch ◽  
P. Dziarski ◽  
M. Kulka
Keyword(s):  
Temperature Distribution ◽  
Laser Beam ◽  
Laser Treatment ◽  
High Hardness ◽  
Optical Microscope ◽  
Beam Power ◽  
Beam Diameter ◽  
Laser Alloying ◽  
Laser Beam Power ◽  
Nimonic 80A

Purpose: The aim of this paper was to determine the influence of laser treatment parameters on temperature distribution and thickness of laser-alloyed layers produced on Nimonic 80A-alloy. Design/methodology/approach: In this paper laser alloying was used in order to produce layers on Nimonic 80A-alloy surface. The three types of the alloying materials were applied: B, B+Nb and B+Mo. Microstructure observations were carried out using an optical microscope. The hardness measurements were performed using a Vickers method under a load of 0.981 N. For evaluation of temperature distribution the equations developed by Ashby and Esterling were used. Findings: The produced layers consisted of re-melted zone only and were characterized by high hardness (up to 1431 HV0.1). The increase in laser beam power caused an increase in thickness and decrease in hardness of re-melted zones. The temperature distribution was strongly dependent on laser treatment parameters and physical properties of alloying material. The higher laser beam power, used during laser alloying with boron, caused an increase in layer thickness and temperature on the treated surface. The addition of Mo or Nb for alloying paste caused changes in melting conditions. Research limitations/implications: The obtained results confirmed that laser beam power used for laser alloying influenced the thickness and hardness of the produced layers. Moreover, the role of type of alloying material and its thermal properties on melting condition was confirmed. Practical implications: Laser alloying is the promising method which can be used in order to form very thick and hard layers on the surface of Ni-base alloys. The obtained microstructure, thickness and properties strongly dependent on laser processing parameters such as laser beam diameter, laser beam power, scanning rate as well as on the type of alloying material and its thickness, or type of substrate material. Originality/value: In this paper the influence of alloying material on temperature distribution, thickness and hardness of the laser-alloyed layers was in details analyzed.

scholarly journals Laser surface alloying of ductile cast iron with Ti + 5% W mixture

2019 ◽  
Vol 91 (5) ◽  
Author(s):  
Aleksandra Kotarska
Keyword(s):  
Cast Iron ◽  
Ductile Cast Iron ◽  
Laser Alloying ◽  
Surface Alloying ◽  
Influence Of Process Parameters ◽  
Power Diode ◽  
High Power Diode Laser ◽  
Structure Laser

The article presents results of the research on laser alloying of the ductile cast iron EN-GJS 350-22 substrate with the mixture of titanium powder with addition of 5 wt.% of tungsten. The aim of the process was to obtain surface layer with the in-situ composite structure. Laser alloying process was carried out using high power diode laser (HPDDL) with rectangular laser beam focus and uniform power density distribution in one axis of the beam focus (top-hat profile). The tests included determination of the influence of process parameters on the dimensions of the alloyed beads, metallographic macroscopic and microscopic observations, microhardness measurements of the laser alloyed layers and EDS chemical composition tests.

scholarly journals The influence of laser re-melting on microstructure and hardness of gas-nitrided steel

2016 ◽  
Vol 36 (1) ◽  
pp. 18-22 ◽  
Author(s):  
Dominika Panfil ◽  
Piotr Wach ◽  
Michał Kulka ◽  
Jerzy Michalski
Keyword(s):  
Laser Beam ◽  
Laser Treatment ◽  
Diffusion Zone ◽  
Nitrided Layer ◽  
Nitriding Process ◽  
Beam Power ◽  
Gas Nitriding ◽  
Nitrided Steel ◽  
Laser Beam Power ◽  
And Diffusion

Abstract In this paper, modification of nitrided layer by laser re-melting was presented. The nitriding process has many advantageous properties. Controlled gas nitriding was carried out on 42CrMo4 steel. As a consequence of this process, ε+γ’ compound zone and diffusion zone were produced at the surface. Next, the nitrided layer was laser remelted using TRUMPF TLF 2600 Turbo CO2 laser. Laser tracks were arranged as single tracks with the use of various laser beam powers (P), ranging from 0.39 to 1.04 kW. The effects of laser beam power on the microstructure, dimensions of laser tracks and hardness profiles were analyzed. Laser treatment caused the decomposition of continuous compound zone at the surface and an increase in hardness of previously nitrided layer because of the appearance of martensite in re-melted and heat-affected zones

Laser beam power fade induced by system and atmospheric effects

1982 ◽  
Vol 21 (13) ◽  
pp. 2432 ◽  
Author(s):  
U. Halavee ◽  
M. Tamir ◽  
E. Azoulay
Keyword(s):  
Laser Beam ◽  
Beam Power ◽  
Atmospheric Effects ◽  
Laser Beam Power ◽  
Power Fade
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