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  1. Neubaten

    AISI 4340 Plate Fatigue Limit

    Hi, I've been looking for the fatigue limit of AISI 4340 steel in the form of plate. I found data (S/N curves) for bar at the MIL-HDBK-5, but not for plate. Could those curves be used also for the plate form? If not, please any guide to where I can find fatigue data on plate (or any way to...
  2. Neubaten

    Equipment for Boric Sulfuric Acid Anodize

    Hello, I'm researching the differences between Cromic Acid Anodize and Boric Sulfuric Acid Anodize for a process change we are currently planning, and the hardest thing to compare is differences in factory equipment between them (type of tanks, electrical system, auxiliary equipment, etc...)...
  3. Neubaten

    Straightening Formed Aluminum Parts

    Hi, So I'm reviewing our workshop procedures, and I've found a problem that may seem trivial, but I still haven't found no easy solution. Normally when assembling sheet metal for aerostructures, some of the parts need a subtle straightening for a correct mating, or to correct a small...
  4. Neubaten

    QPL for SAE-AMS specs

    Hi, I'm having some trouble understanding what happened with the QPL documents that existed for the MIL qualified products when their MIL spec was s/s by the equivalent SAE-AMS. In many of them for the QPL document there is no superseding document. Does that mean that the products in that...
  5. Neubaten

    Post your Worst Boss

    For scientific interest. I'll start with my worst boss so far: -Insecure personally and profesionally. Is an engineer, but with R&D background, not industrial. -Obssesed over control and information (uses to patologically hide it, even when unnecessary) -Obstruct every posible...
  6. Neubaten

    Non-Curing Conductive Sealant for Fuel Tank

    Hi guys, I need your help for a little problem where an inusual set of requirements for a sealant is given. I am aware that probably there aren't any products that could satisfy all the requirements, but maybe you know of something useful. I'm looking for a sealant that is going to be used in...
  7. Neubaten

    Cold Work vs. Shot-Peening

    Imagine an aluminium flat coupon (2" thick) having a central hole under traction/compression alternate tension. What process would you apply for increasing fatigue life: Cold working the internal diameter by interference or shot-peening the hole? Supose both process are optimized to their...
  8. Neubaten

    Western Titanium Facing Accusations of Forgery

    http://www.usdoj.gov/usao/cas/press/cas81208-WT.pdf Seems that this guys are facing a well deserved (if convicted) a long journey into deep fecal matter.
  9. Neubaten

    A question on Solid Film Lubrication

    Hi guys, I have a question for you that may seem trivial, but which I cannot seem to answer by myself. You have a cilindrical CRES bushing fit in a hole, and a low alloy steel cad plated pin that gets into the ID of that hole, and for whatever reasons too long to explain, you have to choose to...
  10. Neubaten

    H-97 12 Point Self Locking Nut

    Hi everyone, I'm looking for a nut that is equivalent to the Alcoa (kaynar) p/n H97-4. It seems that the code H97-* is obsolete, and people only offers now the Boeing p/n BACN10HR*C for this code. I can't seem to find a standard for this kind of nut, as I don't want to buy it under a boeing...
  11. Neubaten

    The Neverending Search

    It's been almost two years since I started working as an engineer, 6 months since I started in the aerospatial industry as a materials&processes eng. And there's this thing I noticed: 80% of the things I deal are not easy-access. I mean, I always end up wasting time, stuck into finding what...
  12. Neubaten

    Insightful Information on Creep Age-Forming?

    Hello, I'm looking for information about the Creep Age-Forming process for aluminium alloys, mostly for the aerospatial industry. I have some info on Age-Forming from the european companies that work on the Airbus program, but very little about how americans deal with this process (just the...
  13. Neubaten

    Surface preparation for CRES

    Hi! It's our intention to create a part that has a CRES/SMC composite union. It's basically two sheets joined facte-to-face I am not that wise in the subject, and I would like any orientation into what kind of surface treatment should we apply to the CRES sheet for optimal mechanical bonding...
  14. Neubaten

    Choosing between furnaces using cost

    So we have to stablish a heat treatment process, and the associated machinery. We have to decide between two ways of heating systems: -Joule effect heating -Gas furnace The price of the machines, both suited for a takt time of 30 seconds, is the same. The cost of energy for the anual...
  15. Neubaten

    Fatigue question

    Hello everyone, I have a part that is made from a steel containing 0,35 C and 1,5 Mn. It is quenched & tempered to obtain a hardness of 47 HRC throughout all its section, and then it's shot-peened. The parts go then to fatigue testing, flexion and torsion combined. There are two test...
  16. Neubaten

    Help me find an appropiate bending machine and process

    Hello guys!! I'm currently developing a process for the manufacture of stabilizer bars, and bendig the bar is a key process we're currently examining. Here's the kind of bending I'm talking about: http://img264.imageshack.us/my.php?image=bar1ew1.jpg...
  17. Neubaten

    Heat treatment for Stabilizer bar

    Hello everyone!! This is my first post here, so I´ll try to be as clear as I can... Well, I´ve just finished my studies and I´m currently working at a factory that makes parts for automotive industry. I´m involved in the development of a stabilizer bar for the front suspension set of a...

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