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(Metallographic sample preparation and etching to reveal microstructure only)

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give me etchant for inconel metal and its photoresis - anna sadgar 01/14/12 (0)
Dear all,
I'm working with Ti-6Al-4V (ASTM Grade 5) and I need some tips for the manual preparation of this alloy. Actually I use all the grinding papers (from 180 to 2400) and then I use a 6 micron and a 1 micron diamond paste with alcohol. This route give me good result but it is a very material consuming route; I really appreciate the 3 step technique suggested by George Vander Voort on his site, but I think that this technique is addressed to automatic sample preparation, so my question is : do you have some tips to adapt this technique for the manual preparation route?
The three step preparation route is the following:
1- 240/P280 SiC Paper, Water Cooled, 6 lb(27N)/spec., 240-300 rpm, Comp., Until Plane
2- 9-µm MetadiSupreme Diamond on Ultra-PolCloth, 6
lb(27N)/spec., 120-150 rpm, Contra, 10 min.
3 -0.05-µm MastermetColloidal Silica on Microcloth , 6 lb. (27N)/spec., 120-150 rpm, Contra, 10 min. with attack polishing agent (1:5 mix of hydrogen peroxide , 30% conc., to colloidal silica
It's obvious that I will use all the precautions when I will handle the Hydrogen peroxide. - Stefano Ciliberto 01/12/12 (1)
- Re: Manual Preparation of Titanium alloy samples - Michael He 01/17/12 (0)
In general, when preparing a sample comprised of different materials, is it better to use a preparation method for the hardest material, the softest material, or somewhere in-between?
I have a sample consisting of a 3/16" thick copper strip bolted to an aluminum fitting via a steel nut and threaded stud, and am trying to evaluate the interface between the copper and aluminum.
Thanks in advance for any recommendations. - Brad 01/05/12 (1)
- Re: Preparing samples comprised of dissimilar metals - Jeff 01/05/12 (0)
Hello
Wondering if anyone has a good solution for etching Nitinol for the purposes of surface temper inspection. Prefer something room temperature or achievable with typical refrigerator/hot plate temperatures.
Regards - Ralph Brooks 12/27/11 (0)
I'm looking for an etchant to etch x65 steels With the following composition:(wt%) C 0.04%, Si 0.2%, Mn 1.5%, P 0.011%, S
0.003%, Mo 0.02%, and Fe balance - majid 12/26/11 (1)
- Re: etch - Sarup Chopra 01/01/12 (0)
Is there an etchant that can be used on a 6xxx or 7xxx aluminum and low carbon steel weld to reveal the entire microstructure? Thank you. - Eric 12/25/11 (1)
- Re: aluminum-steel welds - Sarup Chopra 12/25/11 (0)
What is the ideal method of preparation of wrought AA6061 and AA2219 specimens for optical metallography for revealing grain boundaries - Uday 12/21/11 (0)
please suggest ectchantCoNiCrAlY - wsrathod 12/19/11 (0)
hi.dear author.pleas help me about macroetch nickel base superalloy etche formula - sepehr firouzi 12/18/11 (0)
My manufacturing facility buys large quantities of A395 ductile iron castings & sending out specimens to determine % nodularity just takes too much time and the total annual cost has become substantional.
I had one of our subcontract labs send back a mounted & polished specimen that they previously used to determine nodularity. Just for grins I put our 20X Brinell scope on it and was surprised at how much detail I could see. Previously I had a metallurgical equipment supplier try their $1000 stereomicroscope at 75X and the image was poor - in fact not as bright as what my 20X brinell with flourescent room lights produced. The supplier is saying I must buy a $13,000 metallurgical microscope.
My question is after trying a simple 20X handheld unlit magnifier and getting a surprisingly detailed view of the graphite nodules, why can't a 75X or preferably a 100X stereomicroscope give results close enough to the microphotographs taken at 100X that are commonly seen on our reports from our subcontract labs? BTW - I know I will have to buy the same polishing equipment as the pros use - so my only issue is what basic/least costly scope can I use? - Dean Smith 12/14/11 (3)
- Re: Basic microscope needed for ductile iron metallography - Jeff 12/16/11 (0)
- Re: Re: Basic microscope needed for ductile iron metallography - Sarup Chopra 12/15/11 (0)
- Re: Basic microscope needed for ductile iron metallography - E.R.Almeida 12/15/11 (1)
I'm looking for an etchant to etch tungsten carbide with cobalt binder and a borofused layer. Typically, I use Murakami's Reagent for WC with Co/Ni binders and it works well. In this case I need to determine the depth of the borofused layer and therefore need to etch out the boride layer. - Dave 12/12/11 (0)
We want to electropollish the small textured feature (about 100 micron diameter and 100 micron hight) on Ti6Al4V rod. Please suggest the suitable eletrolyte and voltage/current conditions for electropolishing. - Rama 12/06/11 (0)
to mix a good solution of Nital someone tell me to concentration of nitric acid and alcohol for example 200ml alcohol and 2ml Nitric Acid. I have tried thid formula but I just cant get a piece of carbon steel to bring out the grain structure?
Help Please - jeff 12/05/11 (2)
- Re: nital etch - Jeff 12/08/11 (1)
  - Re: Re: nital etch - Sarup Chopra 12/09/11 (0)
why do we have to wash and dry the specimen before proceding from one grinding torpolishing to the next and after etching?
- wathsala 12/03/11 (1)
- Re: sir - Jeff 12/08/11 (0)
what is the result if the etching time is longer than the specified time? - wathsala 12/03/11 (1)
- Re: hello - Jeff 12/08/11 (0)
Please I need a good etch for revelation of eutectic cells for gray cast irons.
Very thanks. - E.R.Almeida 11/28/11 (1)
- Re: e.r.almeida@uol.com - Jeff 11/28/11 (0)
is the grain boundary flat - mohammed maithem 11/26/11 (1)
- Re: grain boundary - Jeff 11/27/11 (0)
Dear Sirs
I need to do metallography of a Bush made of Fe 410 WA / 11C10 S25 S5 material. Pls suggest me an etchant to reveal sulphides if present at grain boundaries.
Thanks - Mithun 11/22/11 (1)
- Re: Etchant to reveal sulphide inclusions - Sarup Chopra 12/17/11 (0)
Does anyone have a data table with the surface roughness values achieved with various SiC grit papers used for metallography?
Thanks - Don Norsworthy 11/17/11 (3)
- Re: Surface Roughness achieved with SiC grit papers - Jeff 11/21/11 (0)
- Re: Surface Roughness achieved with SiC grit papers - Jeff 11/19/11 (0)
- Re: Surface Roughness achieved with SiC grit papers - Kai 11/18/11 (0)
Dear experts!
I'm working with Ti-6AL-4V alloy and try to prepare cross section of titanium sheet for EBSD texture analysis. At the step за final polishing with colloidal silica I'm realise that sample dramatically etched. All trials with reducing of concentration of silica (mixture with water) doesn't give any effect. I'll be very appreciate if any one can give some advice. - Evgenia Yakushina 11/02/11 (1)
- Re: Sample preparation of Ti64 for EBSD - E.R.Almeida 12/15/11 (0)
hello
I wanted to ask if anyone has experience on the cleaning of steel samples for control inclusions.
I explain, I do these controls with automatic Struers polishing, stone + cloth 15 micron + 3 microns + 1 micron, as you well know the problem is to clean with water and suspension water based.
can someone explain how the water interacts with inclusions?
does anyone know a way to clean the samples without water, perhaps for use with automatic machines?
Thanks - Marco Caruso 11/01/11 (3)
- Re: inclusion steel (without water) - Chris Butcher 11/23/11 (0)
- Re: inclusion steel (without water) - Fiderò 11/01/11 (1)
  - Re: Re: inclusion steel (without water) - Marco 11/03/11 (0)
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