stillcrazy,
For 17-4 stainless why not apply sub-harmonic stress relief if you are interested in machine stability? I recently talked with one of my aerospace customers who said that they are using sub-harmonic stress relief on various high strength materials including 17-4 stainless and they...
Cedarman
YES, your proposed approach is exactly my recommendation too, not because the scale would represent a problem but it is always a good idea to get the part as stress free as possible before finish machining.
BTIGuy
The Black Magic system incorporates the world's most successful vsr process - "Meta-Lax" (www.met-lax.com) in treating whatever is clamped to its table top. I assure you that the part "flexes" during the process. But what is more important is the FACT that Black Magic processing works and...
Dinosaur
Can't help you with design or material selection, but I recommend that you use sub-harmonic energy "during welding" which will make the weld up to 400% more ductile while keeping the same strength. This makes the weld metal more "forgiving" in service and lasts longer. Impact...
Dinosaur
Can't help you with design or material selection, but I recommend that you use sub-harmonic energy "during welding" which will make the weld metal up to 400% more ductile while keeping the same strength. This makes the weld metal more "forgiving" in service and lasts longer. Impact...
Kiwinjuneer,
Nice questions. As one who has witnessed this industry for over 30 years, a mfr of the Meta-Lax line of eq, and a planer-mill machine shop owner, I can answer your first 2 q's (and I don't know the third). But before I do let me point out that "vibration" is much like heat -...
Hi Koes2,
I work for a company that specializes in using sub-harmonic vibrations during welding. We have been doing this since early 1970's on various metals including most steel alloys, stainless steels, aluminums and exotic metals too. My father actually was the one who developed the...
James,
I am not a metallugist however I have worked in the stress relief industry for decades with the sub-harmonic vibration stress relief system. It is confusing because many people use stress relief interchangeably with other very specific processes. Simply put, I see the difference between...
Gearman1234
If you want to stress relieve to assure machine stability, shape stabilization, or to reduce premature fatigue then I suggest that you could use sub-harmonic stress relief on your 4140 tubes. The nice part about this process is that it does not change "hardness" at all nor does it...
andt
To stress relieve your 5083 parts you can use sub-harmonic stress relief IF your intended goal is limited to one of three reasons: 1. distortion control following machining, 2. reduce delayed distortion, or 3. reduce premature fatigue. This sub-harmonic process should not be used to try...
123Cat
I suggest that you could stress relieve your 316SS block with sub-harmonic processing and put your mind at ease. This is the "accelerated seasoning" process that the high performance race engine builders have been using for years to accomplish what you are hoping to achieve...
Jim,
I suggest that you use sub-harmonic stress relief immediately before heat treating your large steel pistons. It is a mild process that itself does not cause any treatment distortion, plus, more importantly to your case, sub-harmonic processing relieves any thermally induced stress which...
Glenn,
The explanation presented by bklauba sounds genuine. That's what makes it deceptive or perhaps he doesn't know the details of this report. The thesis from the Oregon Graduate Center that was referenced was even more out of touch than the thesis from Alfred Univ. In examining the...
Glen,
A good vsr process (subharmonics, as referenced by someone else) should work every bit as good as the TSR only if tempering is NOT needed. Often ASME calls out for stress relief when they really need stress tempering. Check it out. You mentioned that the goal is for machine stability...
