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

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

XRD data for a sample, which is a mix of two dissimilar alloys and its Interface. How to analyse the data and separate out the constituent phases?

The data for a bulk sample is obtained in Powder mode. How could one separate out the constituents using JCPDS search?

08 September 2017 5,586 2 View

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

03 March 2021 8,272 1 View

Which is the most efficient etching solution for nickel based alloys?

Which solution reveals the microstructure and features of nickel-based alloys?

02 March 2021 2,221 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

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

Does any one can help me choose a reasonable basis set for intermediate metal ions interactions with guanine (i.e Fe2+, Mn2+, Cu2+ and exc.)?

Hello every body Does any one has any idea to help me choose a reasonable basis set for intermediate metal ions (i.e Fe2+, Mn2+, Cu2+ and exc.) interactions with guanine or other DNA organic...

01 March 2021 6,187 2 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

What could be some reasons why unstimulated monocytes are getting activated?

Im doing PBMC isolation -> CD14+ enrichment using magnetic beads -> stimulation setup. My negative control is just cells in cRPMI but they seem to get activated over and over again.

28 February 2021 7,883 3 View

Why does intensity drops as concentration increases?

Is there any reason for decrease in fluorescence emission intensity of HSA,BSA when increase the concentration ?

28 February 2021 3,653 4 View