Can we use bronze as an electrode material in resistance welding?

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Why the trailing electron in the cooper pair doesnot cause any lattice distortion?

Only two electrons act in a co-ordinated way. Why this is not extended to an infinite chain of electrons?

02 March 2017 1,704 1 View

Why mercury is liquid at room temperature?

31 December 2016 7,545 0 View

Why Cathodic cleaning or sputtering is ineffective in SMAW / GMAW?

Cathodic cleaning which takes place in GTAW with AC polarity helps in welding reactive metals as during DCEN cycle the surface oxide layer gets cleaned and during DCEP cycle welding takes place....

11 December 2016 8,686 1 View

How an arc gets initiated in Submerged Arc Welding (SAW) process?

The thin air column gets ionised which creates a bridge for the transfer of charged particles from electrode to workpiece and vice versa. This creates an arc. This concept holds good for SMAW,GMAW...

09 October 2016 9,035 1 View

Why DCEN is preferred over DCEP for FCAW?

I could see the text explaining DCEN gives more penetration. but could not understand why only in FCAW (not in SMAW or GMAW) it is preferred

09 October 2016 9,688 2 View

For calculating form factor in an electroslag welding process how width and depth are practically measured?

Form factor = width of the molten metal/depth of the molten metal & higher form factor gives good resistance from cracking. But how the width & depth are measured in practise?

09 October 2016 3,495 1 View

Why do we prefer constant current power source for Submerged arc welding (SAW) process?

Constant voltage power source is said to have better control over the parameters in a mechanised process. But still why do we prefer CC power source for SAW?

09 October 2016 6,849 6 View

What kind of heat treatments are done to the weld joint after electroslag welding?

Since the cooling is very slow, we get coarse grained weak weld region. isnt? The plates that are joined are huge structures. So are they subjected to any kind of local heat treatment (Induction...

09 October 2016 3,967 2 View

Why high form factor in electroslag welding leads to acute angle between columnar grains?

high form factor leads to the growth of columnar grains upward directed from the side wall to the weld centre & lesser form factor results in the growth of columnar grains downward. why?

09 October 2016 3,907 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

How does grain and grain boundary affect the ceramic when studying its dielectric properties?

I am not able to get good literature and the physics behind how first these grains and grain boundaries arises out of no where when we make a pellet to study its dielectric properties and then how...

07 August 2024 5,177 3 View

Why do i have a weak plasma and no coating during rf sputtering?

I have been getting a low plasma and no coating while doing rf sputtering of copper doped ZnS using a power of 140 watts and at pressure of 6.5x10-3 Mb.

07 August 2024 4,526 4 View

Can't spin-orbit coupling(SOC) be included in optical properties calculation in CASTEP?

I am currently using CASTEP version 2020. When I want to run optical properties calculations with spin-orbit coupling(SOC), I encounter the following error in a pop-up window before the job gets...

02 August 2024 2,890 0 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

How to build my own lab made four point probe set up?

Hello, I'm trying to measure the conductivity of semiconductor films but since I don't have a commercial four point probe set up I would like to build one on my own in my lab. I have generators,...

30 July 2024 906 2 View

How to calculate conductivity using Electrochemical Impedance Spectroscopy's Nyquist plot?

Hello everyone, I am new to this characterization but watching videos on youtube I have already plotted a Nyquist plot (Z' and -Z'') and already fitted models on my material using Zsim. But now I...

29 July 2024 1,376 0 View

What should a Mechanical Engineering PhD scholar focus on during their PhD to enhance their chances of securing a postdoctoral position?

29 July 2024 7,714 4 View

Addition of EDTA during the synthesis of copper nanoparticles to prevent it from being oxidized?

I've attempted to use this method to synthesize copper nanoparticles. Copper nanoparticles can be synthesised using a variety of precursor materials. CuSO4, distilled water, NaOH, and EDTA are...

28 July 2024 8,027 3 View