How does flow stress influences increase in porosity ?

What are the various reasons for increasing porosity in powder metallurgical composites?. And how flow stress relates to porosity.

03 April 2018 7,689 3 View

Does addition of zinc stearate to metallic powders of iron, copper, aluminium etc in Powder metallurgy brings in problems?

In powder metallurgy stearates are added while mixing of powders in order to facilitate compaction. Further these stearates are removed during dewaxing. If zinc stearate is added as a lubricant...

01 February 2017 1,175 5 View

How to read oxidative wear in SEM image?

10 November 2016 6,482 2 View

Compressive strength of Composites at high temperature?

I wanted to know the approximate reasoning for the decrease in compressive strength of Fe based composite at high temperature (500 degree Celcius).It would be a kind gesture if some one provides...

09 October 2016 5,824 3 View

Complete details of certain refrence?

Kindly apprise me about the complete details of the article titled 'Self-lubricating sintered composites with hexagonal boron nitride and graphite mixtures as solid lubricants'.

06 July 2016 5,084 3 View

Porosity?

What is the easiest way to calculate porosity in sintered alloys.

03 April 2016 7,964 7 View

How to calculate relative density?

03 April 2016 6,267 4 View

Location of Oxides formed on Iron based material?

02 March 2016 8,465 2 View

How to calculate wear rate?

If some one can clarify as to what formulae is best for calculating wear rate in case of composites.

02 March 2016 5,599 17 View

Can iron oxides such as Fe2O3, Fe3O4 be used as solid lubrication?

Iron oxides possess good hardness and is it possible that these oxides help in reduction of friction at 500 degree celcius

02 March 2016 3,010 8 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

Can water be extracted from Olivine?

I have always been interested in geology and wondered about how unique structures of materials behave in different circumstances. I stumbled upon Olivine, the magnesium iron silicate, and heard...

28 February 2021 7,330 4 View

Can anyone share his experience regards Smoothing in origin?

I am working on TiO2 composite material and the results of XRD have a lot of small/junk peaks and while I apply a smooth filter in Origin then the other characteristics peaks disappear so anyone...

26 February 2021 8,183 3 View

How does charge on working electrode changes with rising potential?

During performing CV of a GCE or modified GCE, we rise the potential in the first half of the cycle and reduce it in reverse half. During the first half, what is the nature of charge on GCE or...

25 February 2021 7,994 3 View

When I mix oil and NaOH solution, Why solid layer in the surface is formed?

During my trial for lubricant oil re-refinery process, I use NaOH as coagulant agent. After overnight of gravity settling, a solid layer in the surface was form. what product is that? since the...

22 February 2021 2,116 4 View

How to construct different filler shape in MD simulations?

Is there any way to construct different initial filler shapes like triangle, square, rectangle, pillar, and tube in any simulation software.

20 February 2021 1,750 1 View