In COMSOL simulation of SLM- AM process, how do we add the powders in cubic packing over the build substrate?

Am trying to simulate the SLM process for a single layer of Alloy 718. I need to add 718 powders of 40 microns thick over the substrate plate and simulate the printing. How could one add up the...

09 October 2019 2,099 10 View

What would be the initial and the ending melt pool dimensions when the laser beam shines on the powder material in the SLM process?

Melt Pool dynamics determine the features of the part produced in the SLM. The question is about the initial and ending melt pool shapes during the 3D printing and how much time would it take to...

06 July 2019 6,143 3 View

In SLM process, what are the reasons for part to protrude out from the surface and how to avoid it?

During the SLM printing process, it was observed that the recoater blade constantly touch the parts and as a result less amount of powders were seen to deposit over the printed part. Why would...

04 May 2019 1,423 4 View

Reference books to learn in depth about Creep in alloys and its various testing methods?

Could you please suggest me a book for understanding more about Creep properties of metal. In addition, I want to know the various testing methods available.

31 December 2018 4,720 8 View

Is it true that the residual stress in EBM process are smaller compared to SLM process due to long time exposure to high temperatures in the former?

I want to know the exact reasons for residual stress formation and the standard adopted practices to avoid them during 3D printing.

11 December 2018 1,422 10 View

What does micro-pores present on the microstructure of additive manufactured alloys signify?

In the analysis of the etched microstructure of the additive manufactured nickel superalloy, micro pores in the nano-meter dimensions were found in the matrix and also on the dendrite structures....

04 May 2018 1,847 7 View

Could anyone suggest books to read about Automobile Crankshafts and their failure mechanisms?

Wants to learn about the basics of Crankshafts and the different failure mechanisms.

01 February 2018 9,478 2 View

Is differential etching for SLM processes associated with the thermal stress or any high-energy associated during the process?

The sample showed processed by SLM shows differential etching with respect to surface and the bulk. The cross-sectional samples after the deposition are etched. What could be the reasons for the same?

01 February 2018 3,806 5 View

How is the heat extracted as the melt pool Solidifies in the Laser Beam Melting Process ?

Consider an hemispherical molten pool, which has a higher temperature at the top surface and a lower temperature at the bottom surface. I am confused about the direction of heat extraction and the...

31 December 2017 7,129 3 View

Why does FCC structured materials Hardness indent does not show the typical depression zone around it, even though the hardness is over 400 HV ?

As per literature, FCC materials show larger depressions around it after hardness indentation. But an additively manufactured sample having hardness around 400 HV and is assumed to be FCC, does...

31 December 2017 5,603 7 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View