×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

(OP)
I am trying to find an S-N curve and/or the strain-life curve of 17-4ph h1025.
I found the data for high temperatures on the AMS website but nothing at room temperature. That is strange, I believe if it is tested at high temperature than there should be some reports available for room temperature fatigue life. Please lead me to the source.

Thank you

RE: Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

MMPDS would be the best source.
Caution, with 17-4PH the actual strength, original material size, and sample orientation are all important.
So how the material was made. Most 17-4PH is air melted, but it is available as re-melted product that has much higher toughness and fatigue properties (especially transverse).
The toughness and fatigue properties of 17-4PH start dropping off above 1" thick, and tank above about 4" (this is why 15-5PH exists).

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

(OP)

Quote (EdStainless)

Thanks for the detailed explanation. The two things that took my interest the most are "how it's made" and "sample orientation". Can you refer me to somewhere where I can have some more details on that? I am working on a part failure analysis. Got results from a lab but those results are indicating multiple theories and I am trying to zero out the reason of failure based on stress cycle other factors.

Any help will be appreciated.

Thanks

RE: Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

So what is the item? You need to know the size and shape, as well as how it was formed from the raw material, and what size that was.
This is an alloy that for aerospace work prohibits the cutting of plate to make bar. With plate you have three directions; L - longitudinal, this is the rolling direction; T - transverse (more accurately LT long transverse) which is the width of the plate; and ST - short traverse, which is the thickness.
If they started with a thick piece of stock and machined a smaller part of of it then both orientation and location within the raw material could play a roll.
The toughness and fatigue properties will be descending in that order as well.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

ParthZala-

Below are S-N curves from MMPDS for notched 17-4 PH cond H1025 bar, which may differ from your case. These curves are for AMS 5643 which is air melt quality material. AMS 5622 is a vacuum melt quality form of the same material, and would have better fatigue performance as EdStainless noted.

Hope that helps.

RE: Can anyone suggests a good reliable source for fatigue life of 17-4ph H1025?

(OP)
Thsnks tbuelna thanks for the help. This graph shows results with stress concentration 3. Can you please suggest me how I use this for fatigue analysis? Ideally I believe I need fatigue test results of test done without notch so no stress concentration.

Thanks

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close