Why <110> dumbbell in bcc iron has the lowest energy configuration ?

In non magnetic materials, is the lowest energy configuration and not SIA dumbbell. But, in bcc Iron dumbbell is the lowest energy configuration. What makes...

07 August 2018 5,113 3 View

Why MD simulation of mechanical loading (ex. tensile) in metallic systems gives stress values in GPa (high stress value) ?

During MD tensile simulation, the stress values rise upto some GPa (high stress value). I think it is because of the following reasons: 1. System is almost defect free or only with few defects...

07 August 2018 9,414 12 View

How is diffusion coefficient from MSD values obtained from LAMMPS is calculated ?

I'm interested in calculating the diffusion coefficient of self interstitial atom in iron system at 800 K. I got a plot like (attached) this 'MSD vs time' using LAMMPS. The slope (diffusion...

08 September 2017 1,625 24 View

Can any amorphous material be made into single crystal or into a crystalline form?

Amorphous crystal

01 January 1970 641 26 View

Martensitic transformation is considered as diffusionless shear transformation. How is shear involved in this transformation?

Diffusionless implies atoms have not moved. Then how come shear in this transformation of steel?

01 January 1970 801 3 View

What potential should be used for iron for studying dislocation crack grain boundaries interaction using molecular dynamics simulation ?

01 January 1970 3,466 6 View

In martensitic transformation in steel, why should we consider BCT by joining the face centered atoms of FCC even though FCC has higher symmetry?

FCC has 3 fold symmetry but BCT doesn't. So why should we draw a BCT inside a FCC and name it as martensite. A reverse can also be done where we can draw BCT and they get a FCC out of it. If so in...

01 January 1970 9,731 13 View

What is the Relation between Grain Boundary and grains crystallography ?

what does it mean - "Fe sigma 3" symmetric tilt grain boundary ? I know about sigma. What is the plane and direction of the two grains and grain boundary ?

01 January 1970 5,962 7 View

Out of several space groups and point groups in crystallography how we end up in 7 crystal structures and 14 bravais lattices?

Which symmetry operator is a must to all crystal structures and bravais lattices?

01 January 1970 4,097 1 View

How do cerium and magnesium addition help to convert Grey cast iron into speroidal grey cast iron during heat treatment?

Cerium and Magnesium addition are done duirng casting in GCI so that after heat treatment GCI is converted to SGI. How Mg and Ce are contributing to this change?

01 January 1970 5,157 10 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Research on Supply Chain Management in Indian context?

Hi, I am planning to apply for the PhD degree in the Supply Chain Mgt. with specific area of "Cold Storage warehouses" during Pandemics and wars. Where lock downs and shut downs are frequent....

02 March 2021 285 2 View

Can anyone help me with the administration of the "Mind the Gap" Scale for satisfaction with transition to adult care?

We are working on a study focused on adolescents' transition to adult care and are looking for a validated measure for satisfaction with the transition. So far the only measure that we have came...

28 February 2021 2,338 1 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

How to modify Johnson cook equation in ABAQUS?

I wanted to add an extra parameter to the existing Johnson cook equation in the ABAQUS simulation. How to add those extra parameters. Ref: A modified Johnson-Cook material model with strain...

28 February 2021 4,841 3 View

Which transition metal salt precursor is best for doping? Why?

I would like to synthesize a transition metal doped TiO2 via solgel method. Hence, I would like to know which metal salt precursor to choose among Chloride, Nitrate, and Sulphate. A clear...

27 February 2021 4,285 3 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

What is the suitable range of Sulfur content and Viscosity of Heavy fluid Oil that used in Kiln?

What is the disadvantages of high sulfur content to the ceramic burning process? and what is the effect of outranged viscosity?

24 February 2021 8,219 2 View