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 MintJulep 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: *

  1. cocobolorose

    problems mounting samples

    I mount a lot of samples in bakelite, but am not familiar with your use of epoxy. Are you sure the epoxy is fully cured and isn't outgassing in the process? I've found any moisture in the enclosure will give you problems.
  2. cocobolorose

    non-contact 3d surface roughness measurement

    minimotorsports: Get in touch with Paul Beaulieu or Chris Rinaldi at Excel Technologies (Enfield CT; www.extec.com ) They should be able to place you with someone. good luck.
  3. cocobolorose

    non-contact 3d surface roughness measurement

    http://www.alicona.com/ Their Infinite Focus Instrument is capable. I use one regularly.
  4. cocobolorose

    identification of materials?

    If chemical spot tests are what you're looking for, get a copy of ASTM publication STP 550: "Nondestructive Rapid Identification of Metals and Alloys by Spot Test"
  5. cocobolorose

    Material scanning

    We've been very successful with eddy current testing. Check these sources "Contactless Diameter Measurement of Wires Using Eddy Current" at www.uwic.ac.uk/sped/research/AppliedSignalsProcessing/ Publications/Test%20and%20Measurement.pdf and http://www.foerstergroup.com/index.html
  6. cocobolorose

    Looking for plywood curving

    http://www.woodweb.com/knowledge_base/Best_material_for_bent_lamination.html
  7. cocobolorose

    etchant for 304 stainless

    There's a lot to choose from. I just etched a piece with 6H2O-6HCl-2HNO3, immerse for about a minute or so. Very good results.
  8. cocobolorose

    tungsten (?) filament tensile/fatigue strength

    The tungsten wire will have a hard drawn, fibrous microstructure at first, and will be pretty flexible, otherwise it couldn't be coiled and re-coiled to make light bulb filaments. Recrystallization occurs at about 1200C, and then it will be very brittle at RT. The major benefit to using...
  9. cocobolorose

    Removing Mo without attacking W or Re

    Just for the record, the folks in the lighting industry dissolve out the Mo mandrels that tungsten wire is wound on by soaking in a HNO3/H2SO4 solution for a few minutes @50C. Doesn't affect the Re in W-3Re coils either.
  10. cocobolorose

    Bonding Neoprene to other materials

    I regularly bond neoprene to wood with CA adhesive, which works exceptionally well. Perhaps it would work as well with other materials
  11. cocobolorose

    TiN hard-coating punch

    This subject seems relevant to our problem where we are using cemented carbide wheels to score glass tubing in high speed production. Would a TiN-coated material be better, since we are losing a lot of carbide wheels due to chip-out on the cutting edges?
  12. cocobolorose

    Tungsten Filament becoming brittle

    Pure tungsten will recrystallize to an equiaxed structure @1200C, and in this condition is extremely brittle at RT. Lamp grade tungsten is doped with potassium (~80ppm) which impedes GB growth, raising the re-x temp to @ 2000C, and imparting ductility when cool. However, Fe, Ni, and Al on the...
  13. cocobolorose

    Materials selection for HE resistance

    We're doing some experiments at 800C in hydrogen, but the SS foils we're using are rapidly failing, presumably due to hydrogen embritlement. What other metals/alloys can I try?

Part and Inventory Search

Back
Top