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Ask The ExpertsMetallography Forum |
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(Metallographic sample preparation and etching to reveal microstructure only)
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Ask The ExpertsMetallography Forum |
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(Metallographic sample preparation and etching to reveal microstructure only)
Could anybody please give me advise or answer for my questions about microscope evaluation of brazed joints?
- Kris 07/25/08 (0)Thank you.
- Robert M. Entler 07/24/08 (1)Thanks,
Arshad
In low alloy steel pipes under hydrogen service are found with hydrogen blisters. kindly tell me its solution if possible at your earliest.
regards,
- Aamir Ali 07/21/08 (0)In the microstructure of hardened and tempered 431 grade steel we are finding delta ferrit approximately 2%, we would like to get your expert openion on the effect of this delta ferrite on impact property.
- S.S.KASANA 07/18/08 (1)y que tempratura sopòrta un acetato plastico de polivinilo, para hacer una replica metalografica
- DANIEL MARTINEZ TORRES 07/08/08 (0)The procedure involves placing the specimen in an oxidising atmosphere at 855degC for 1 hour, which causes preferential oxidation of the prior austenite grain boundaries. The sample is then quenched, the scale removed, lightly repolished and etched. I used Villelas.
Can anyone shed some light on the actual process, and what i'm looking at under the microscope? It looks like a perfect austenitic structure! Is it actually ferrite? have i decarbed it? I also have some concerns about the fineness of the grain size. Is the temperature high enough and the time long enough to affect the grain size?
Any information you can provide would be extremely helpful!
Thanks!
- PB 07/08/08 (3)I am looking for a suggestion to help bring out the carbides in the structure. I am thinking that a diluted Picral may be my best solution at this moment, but I was hoping for any other suggestions.
I am working on SAC alloy (Sn-Ag-Cu) planning to use EBSD which can reveal informations about grain size, grain orientation and texture.I am not sure what the exact sample prep technique is all about. Please give me a detailed information which helps me to move ahead.
Thank you very much,
Bharat Joshi
- Bharat Joshi 07/02/08 (0)
Could You please advise me what etchant would be the best for AMS5536 (Hasteloy X) material. I've tried to etch this with Glycergia, Kallings, Adler - doesn't work.
- kris 06/26/08 (2)Thanks
Javaid
Do you know about the etchent C13 and how it is prepared and used ?
- datta kumara 06/19/08 (2)I was wondering if anybody knows or can figure out an etchant for Ni2MnGa. I would like to get a fast (macro) etchant. I looked through several books but could not find anything about that specific alloy. Is there a good scientific approach of figuring out an appropriate etchant?
Thanks, Markus
- Markus 06/16/08 (1)2.) why is it important to follow the rules of cleanliness in the preparation of specimen?
3.) what are the characteristics of pearlite and ferrite?
- choong 06/15/08 (2)If some body is knowing please suggest
- Jadhav S G 06/12/08 (2)Can you suggest good etchant for Nimonic 263.
Thanks
- Ruchi 06/09/08 (2)There should not be any odd effects like chilling ,Carbide formation.Section thickness of the component varies from 8 mm to 20 mm.Suggest me the composition of alloying elements.
Regards,
Ravi
good morning, I would like to carry out A262 Method A test on 304 & 304/L material.
(1) How do I go about doing it? such as what kind of acid at what concentration in mixture with water?
(2) How do I know the sign of "sensitization" around HAZ? such as picture to show me before and after a "good" and "bad" micro structure?
I hope anyone can guide me through step by step of required acid solution & way to determine the result.
thank you very much.
Alan
Kindly suggest me the etchant to reveal the microstructure of AA6061 Al-alloy which is mainly Al base wrought alloy containing Mg and Si as major alloying elements.
- Jatin Rana 06/04/08 (4)yathish.
- yathish 06/03/08 (2)Dear Experts
This is an old subject, but I am seeking your advice and assistance to understand the following:
What is the best etching technique to reveal PAGB (prior Austenite Grain Boundaries) in low alloy steel at quenched and tempered condition?
From your experience, does 4% Nital etch reveal PAGB in low steel at Q & T condition?
Can prior austenite grain size be measured without revealing PAGB in a microstructure which shows only tempered martensite and not PAGB?
Is there any way to measure prior austenite grain size in metallography or replica metallography, apart from revealing PAGB?
I would be thankful if you can provide me your expertise on the above.
Regards
Metallurgist
What etchant would be the best to reveal retained austenite (and how should it look like) on flamed heat reated 4140 steel!
Thanks for help!
- Kris 05/29/08 (1)i see a blue film with the naked eye over the sample, and when i watch the sample with the microscope, i can see a matrix with many blue tones and another colors like orange.
althoug i see some grain boundaries, i cant see them on the entire field view of the microscope.
the time etch i used is from the 90 to 120 s.
i'll thank you if you give any tip with the use of this reagent.
thanks Luis E. Carrera
- Luis E. Carrera Anlehu 05/28/08 (0)We are facing problem in identifiedthe etching solution for the bellow chmistry
Carbon - 1.25%
Silicon - 1.85%
Manganese - 0.45%
Chromium - 34.00%
Molybdenum - 2.30%
Nickel - 0.25%
Titanium - 0.050%
Please suggest me a etchent used for the same
Thanking you
Datta Kumara.S
- datta kumara 05/21/08 (2)I wount learn some abort metallography yinglish
²»ÖªµÀÄãÃÇ¿´µÄ¶®²»?»¹ÊÇлл´ó¼Ò
- rast 05/16/08 (1)The etchants I am using are:
120ml ethanol (C2H2OH)
30 ml hydrochloric acid (HCI)
10 g ferric chloride (FeCI3)
I was wondering in what the concentration the hydrochloric acid should be.
Thank you very much for your help,
Julia Wiecken
PhD student
Department of Archaeology
University of Exeter
Can you tell me the suitable etchant for TiO2 plz?
- Yasir 05/12/08 (1)Is there a national standard test that can be performed to test.
I am facing a similar question for H2S in a similar application.
If you can point me in the direction of any test standards that can be use it would be most helpful.
thanks,
Mike Neiman
Your answers are appreciated in advance.
- canderim onder 05/07/08 (2)Is there an etchant for reaveling presence of shrinkage based on Cu intermetallics when they grow up in hot spots?
- Antonio Magallanes 05/05/08 (2)Beraha BI
Klemm I
Sulfamic beraha's
Beraha cds
Sodium metabisulfite beraha's
LB Reagent
thanks
- nizam basha 04/27/08 (2)i need an etch for 61Co-29Cr-6Mo, could you give me a suggestion, i can´t use electrolytic etch
- Alfonso Neftali 04/24/08 (0)I also need information about any supplier of lab purpose induction melter to prepare alloy ingots.
- S.Parida 04/24/08 (1)After etching a 6150 spring steel quenched (845 C)in oil and tempered (425 C),using nital,I observed a microstructure different from the usual darkened tempered martensite.It consisted of a colored gray web spread towards the surface of the specimen.Can it be tempered bainite?
Thanks in advance
- Rogério Tavares 04/16/08 (3)Thank You for Yous help?
- Krzysztof Maœlak 04/14/08 (1)What is the etchant can be used to reveal the forge line in ERW Tubes.
Appreciated if you can send the Procedure for Checking the Flow Lines
- Kaarthic.N 04/11/08 (3)
as well galvalume coated structure which etchant will be perfect.what is the compositition of amyl nital. how to prepare. thanks prerana
what is the etching sol. for T800 and T800 + WC coated on stainless steel by Hvof coating tech.
thanks alot
- rokias 04/06/08 (1)thank you
- Randal Gee 04/02/08 (1)Is it possible to find out from microstructure?
If so, which etchant to be used?
Please guide me...
- S.Raveendran 04/02/08 (2)Thanks in Advance.
- Jack Lally 03/17/08 (1)Has anyone ever heard of Shantz's Reagent ? If so, does anyone have the recipe for it ?
Thanks,
Ian Nunn
- Ian Nunn 03/13/08 (25)Has anyone ever heard of Shantz's Reagent ? If so, does anyone have the recipe for it ?
Thanks,
Ian Nunn
- Ian Nunn 03/13/08 (0)I need information for Zr etchant.
I have sample of Zr thin film sputtered on Si substrate. I would like to know what is the best etchant so I could measure the Zr thickness on Si layer.
Thanks
Regards,
Tedi Kurniawan
I have been working with HSLA steels and am having a dificult time bringing out grain structure, flow lines, and fusion lines in our ERW tube making process
- cliff Jones 03/11/08 (5)I would appreciate any suggestion on a method to black oxidize hardened AUS8 stainless. I am attempting to darken the recesses of filework on a custom knife to enhance the relief appearance. A swabbing rather immersion technique is preferred. Thank you in advance.
- Randy 03/01/08 (0)We are need the Chamical composition and physical / Mechanical properties of ASTMA UNS 31803 material.
- Niranjan Khade 02/25/08 (1)Also, we are looking for a good sensitization test because ASTM A 262 does not cover this alloy.
Thanks!
- Albert Zweistein 02/21/08 (11)I have been asked to carry out a microexamination of 0.9mm laser/spark eroded nimonic 75 sheet to check for the presence of 'spark out'.
I know what this is in a grinding sense, but how would it manifest itself as a feature on a microsection?
Please suggest me the additions in the one ton induction furnace and templerature for tapping for about 20 mm section thickness part.
I will be waiting eagerly.
Thanks.
Sincerely,
Dhan Upadhyaya-Gujarat-India
- Dhan Upadhyaya 02/12/08 (10)Thanks
- Ana 02/06/08 (1)We have tried a Sodium Hydroxide Etch, and Keller's reagent without any luck. Do you need to view under polarized light for either of these etchants? The documentation we have is not specific.
Is my only option Barker's?
Thanks,
- Rob Peace 02/05/08 (114)I tried to take kikuci pattern of HAZ Stainless steel welding SS304. I choose two phase (gamma/austenitic SS and alpha ferritic stainless steel)
but EBSD showed many unidentified orientation (black area)
I wonder to know why?
Thank you,
Malia Miranda
thanking you,
shanthi elangovan
Thanks and best regards,
I have used the Kalling No. 2 reagent and I have seen something like a laminar morphology.
Please, tell me if i have used the correct reagnet and what i expect to watch in a picture with 100X
Thanks a lot
- Luis E. Carrera Anlehu 01/19/08 (8)Best regards,
Reza
thanks
- robert 01/16/08 (1)Best regrads