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Questions related from Roshan Sebastian
I was wondering the reasons for peak broadening in the diffraction patterns (obtained from Molecular Dynamics simulations) as the material undergoes melting, and ablation (vaporization/plasma...
14 October 2024 3,516 3 View
I am trying to analyze the amount of gold in the copper anode slime. Since it has other elements such as Pb, Cu, Se, and Ag in it, what would be the best reagent to dissolve them for ICP? And is...
10 April 2022 2,845 3 View
I want to analyse the elemental composition for copper anode slime doré slags, that are produced from the doré furnace. I would want to know the ISO standards available for the analysis of these...
01 April 2022 5,131 0 View
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...
29 October 2019 2,923 10 View
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...
29 May 2019 1,962 3 View
I need suggestions on the best type of support structure to be used for 3D printing Inconel 718 using Island strategy (5 x 5 mm). Will these structures affect the texture of the part produced? It...
08 March 2019 2,944 1 View
I want to know how the texture is related to the thermal gradients in the melt pool during the SLM process. Also, would a larger thermal gradient give you a better texture? What are the prominent...
11 February 2019 5,365 4 View
It is a known fact that the creep of SLM processed IN 718 is much lesser than as-cast samples. Want to know the factors causing this reduced creep in SLM processed Inconel 718. Is it dislocation...
29 January 2019 7,276 4 View
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.
16 January 2019 6,060 7 View
I want to know the exact reasons for residual stress formation and the standard adopted practices to avoid them during 3D printing.
20 December 2018 7,713 9 View
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....
30 May 2018 2,590 6 View
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?
21 February 2018 4,557 4 View
The Cast iron surface was Laser treated and the Molten region comprising fine dendrite was observed. But I need to check whether the dendrites are actually carbides formed in the Austenite region...
09 February 2018 6,680 3 View
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...
28 January 2018 1,402 3 View
In literature's the Austenite solidified phase of Iron has a varying hardness from 500 HV to 1000 HV, depending on the quantity of Martensite in the phase. But similarly processed Nickel Austenite...
25 January 2018 8,376 4 View
Need to know the composition and more info on what exactly is the alloy.
27 September 2017 4,322 4 View
The data for a bulk sample is obtained in Powder mode. How could one separate out the constituents using JCPDS search?
22 September 2017 8,677 3 View
Like to know the formal steps in disposing of the chemicals whose shelf-life is over. The chemicals are basically Acids, both Organic and Inorganic, and Hydrogen peroxide.
19 June 2017 1,665 4 View
In order to examine the micro-structure in cross-section of the Inconel alloy on Cast iron, I'm not able to find a suitable etchant which could give good image. There are various etchants for both...
23 May 2017 9,063 12 View
