Why the welding depth increases with decreasing of surrounding pressure during laser welding of steel, but it conversely decreases in case of copper?

12 December 2017 0 2K Report

The question arose after reading this article:

Lasers in Manufacturing Conference 2015

Influence of Ambient Pressure on Spatter Formation during Laser Welding of Copper. Andreas Heidera, Thomas Engelhardt, Rudolf Weber, Thomas Graf

Badges
Science topic

More Rinat Seidgazov's questions See All

What part of the beam power is spent on evaporation during keyhole laser welding? How to prove it?

According to the estimates only about 1 percent of the beam power is expended on evaporation (up to 60 % is expended on thermal conductivity and about 40% on melting). On the other hand, there are...

10 November 2018 1,170 5 View

How much welds it need to do for the designing of high quality laser welding technology without any pores using trial-and-error method of designing?

The laser welding of responsible products (shipbuilding, aerospace, nuclear industry, automobile industry, equipment for oil and gas industry, etc.) is associated with high requirements to the...

01 January 1970 920 3 View

Laser welding simulation - physical or surrogate model? Why the surrogate model is masked as a physical one in reality?

To interpret the hydrodynamics of deep penetration welding, an evaporative model is usually used, taking into account the melt flow resulting from the action of high-pressure steam. However, the...

01 January 1970 9,310 3 View

Using OBD technique i am trying to measure laser induced shockwaves velocity i found that at start velocity increases and then decay?

i am unable to interpret why its increases in start as shown in figure

11 August 2024 2,179 1 View

Hello researchers Is this a random laser or just fluorescence?

I am using Rhodamine6G as gain medium and silver nanoparticles as scatterers on a microscope slide and laser input 532 nm comes from above.

09 August 2024 9,894 2 View

How can I apply boundary conditions in an orthotropic steel deck numerical model using ABAQUS software?

I am trying to simulate vehicular loading on an orthotopic steel deck bridge section in ABAQUS software. The red arrow mark in the attached figure indicates the direction in which the vehicle will...

08 August 2024 719 0 View

How to fix errors in my heat transfer steel structure with reinforced concrete slab model Abaqus?

I have modelled a steel structure using beam elements in Abaqus and attached to this structure reinforced concrete slab. The analysis that I am making is heat transfer of the structure. The...

07 August 2024 1,028 0 View

Could dyes amplify the spectrum of light to a specific wavelength?

I am interested to know the behavior of dyes toward light. Specifically, Blue dyes re-emit the spectrum, especially from the green zone (known as principal in LED lamps, and blue dyes are known...

05 August 2024 3,290 1 View

Pls send me IEEE conference paper template if anyone have?

IEEE Conference template

02 August 2024 8,762 2 View

What should be the sample container for the hydrothermal reaction in a microwave reactor at 180 °C for 10 min at the heating rate of 5 °C per minute?

Suggest one of them 1. Teflon-lined stainless steel autoclave: 2. Alumina (Al2O3) ceramic container

30 July 2024 7,326 1 View

Do you know of any online international conferences that offer free discussions?

Do you know of any online international conferences that offer free discussions? I am looking for examples in the field of molecular ecology and DIY biology.

28 July 2024 6,501 0 View

How should operational parameters be selected when developing a pore-free laser welding technology?

There are three operating parameters - the laser power, the diameter of the focus spot and the scanning speed. It is necessary to obtain a seam of a given depth without pores. What parameter...

27 July 2024 7,168 2 View

Will the catalytic effect of retained austenite happens in steels including RA?

The catalytic effect of retained austenite refers to the phenomenon wherein quenching steels with a small amount of retained austenite, when subjected to tempering at a specific temperature...

27 July 2024 8,508 0 View