Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: Liuk
  • Content: Threads
  • Order by date
  1. Liuk

    TP 347 after long thermal exposure replica

    Hello, The replica examination shows some cavities (acc. to focus changing) along grain boundaries. Electropolishing and Kalling's reagent was used in this case. I have some doubts about cavities formation reason. What is your opinion? Thank you in...
  2. Liuk

    duplex steel weld adequate microstructure

    Hello, There is very interesting requirements for duplex steel weld in EN ISO 13445-4 (PED: steel group 10 weld micro structure examination shall shows adequate microstructure. What do you think what it means? My problem: no any intermetallic precipitation, but there are some nitrides...
  3. Liuk

    Strangeness Nimonic micro

    Hello, Replica inspection of gas turbine blades was performed. I see some "strangeness" in micro structure. Please see attached (photo at 100x, photo at 500 in next message) Some precipitation along grains boundaries/in grains. Surface was cleaned carefully before replica... Is it possible so...
  4. Liuk

    Strange discontinuity near SS pipe surface

    Hello, We have examined SS pipe surface condition. There are some stress corrosion cracks on OD surface. But this subsurface discontinuity (please see attached file) is very strange. What is your opinion? I see the shape of defects like this in the first time in my practice. Thank you in...
  5. Liuk

    Replication. Cavities and carbides

    Hello, Could you help me: what way is it possible to differ single creep cavity and hole from fallen carbide (at grains boundaries)? I have some doubt... Thank you in advance.
  6. Liuk

    Changing of microstructure after fire

    Hello, Could you give me some advice? Now I examine structural steel (S235) sample from fired construction. As I can see there is shperoidisation of perlite and some carbides along grain boundaries. Band structure is disappeared. Is it really possible this changing after fire...
  7. Liuk

    Microalloyed steel bainite in microstructure

    Dear colleagues, Could you give me any advice about evaluation of microstructure of steel 38MnVS6. Only ferritic-perlitic structure is acceptable. If sample 2 microstructure consists from ferrite and perlite (+sorbite?) microstructure of sample 1 consists from ferrite, perlite, bainite...
  8. Liuk

    Duplex weld micro structure anomaly

    Dear colleagues, Could your help me evaluate/understand micro structure anomaly (please find attached)? This is DSS weld cup microstructure (photo TV31, TV32) and SDS one (photo SDD_weld) . Welded joint is in solution annealing condition. It seems sigma phase formation, but very coarse...
  9. Liuk

    ASTM G48_glass cradle

    Dear all, Could you give me advice: where we can order glass cradle for specimen support according ASTM G48? Thank you in advance
  10. Liuk

    Strange SDD steel weld corrosion test result

    Dear all! We have received very strange SDD pipe welded joint corrosion test (acc NORSOK M-601/ASTM G48) result. Weight loss is 40 g/m2, but no pitting on sample surface. Pickling (5%HF+20%HNO3) was performed before corrosion test. Micro examination result is acceptable: no continuous...

Part and Inventory Search

Back
Top