[Ncame-students] Heat-treatment NASA

Shuai Shao sshao at auburn.edu
Fri Dec 18 19:28:38 CST 2020


All,

Please be aware that on the OLD box furnace the actual temperature is ~15 degrees lower than the set temperature. When you use it, this has to be corrected.

For instance, if you want to stress relieve at 1000 dC, then you need to set it at 1015 dC to compensate.

Best regards,
Shuai


------------------------------------------------
Shuai Shao, Ph.D.
Associate Professor
Department of Mechanical Engineering
1454 Wiggins Hall
Auburn University
Auburn, AL
Tel: 334-844-4867
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From: Nabeel Ahmad <nza0057 at auburn.edu>
Sent: Friday, December 18, 2020 6:11 PM
To: ncame-students at eng.auburn.edu
Cc: Nima Shamsaei <shamsaei at auburn.edu>; Shuai Shao <sshao at auburn.edu>; Seyed Ghiaasiaan <srg0041 at auburn.edu>; Michael Knotts <mjk0017 at auburn.edu>
Subject: Heat-treatment NASA

Good evening Students,

Dr. Shamsaei asked us to follow this before performing any stress-relieve or shipping the samples:

  1.  Use a new box furnace to do stress-relieve on all the LB-DED tensile samples ( or any specimen which will be machined later on).
  2.  Use old box furnace to do stress-relieve on the as-built fatigue specimens (or any specimen which will be tested in as-built condition). Besides, while using the old box furnace, please ensure to center the furnace door to avoid any inflow of air.
  3.  If you are shipping samples for the HIP process, Please do not write any heat-treatment cycle other than HIP cycle on the sheet.


Thanks,
Nabeel


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