×
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

Fatigue life of 17-4PH H1150 bar

Fatigue life of 17-4PH H1150 bar

Fatigue life of 17-4PH H1150 bar

(OP)
Have to calculate a 17-4PH H1150 (bar) Kt = 3 / 4 lug fatigue life; unfortunately MMPDS-06 has the S/N curve for the H900, H1025 & H1100 but not for the H1150. If anyone could point me to a H1150 S/N curve source or confirm, if a newer edition of MMDPS has the H1150 S/N curve that would be greatly appreciated.

Thanks guys!
Artur

RE: Fatigue life of 17-4PH H1150 bar

You might have to get a subscription to IHS or a similar service to find what you're looking for. I don't think that data exists for that particular HT/Alloy, so you would either have to do the experiments (long and time consuming) or find a way to justify using a similar alloy/HT.

My company can do the testing if you require it, but I suspect it's less expensive to find an alloy that has the data already available.

RE: Fatigue life of 17-4PH H1150 bar

Aerospace Structural Metals Handbook [ASMH] 1501 17-4PH CRES

Figure 3.5.1.5 Fatigue properties of smooth and notched specimens in air and brackish water at room temperature

17-4PH, 1-in. Plate
Condition H1150
Rotating cantilever beam, R = -1
Smooth
Notched
Air
Brackish Water

Fig. 3.5.3.2 Fatigue-crack growth rate as a function of stress-intensity-factor range with variations in melting practice, heat-treatment, and stress ratio (R) (Ref. 48)

Argon-Oxygen Melt Condition H1150

Regards, Wil Taylor

o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

RE: Fatigue life of 17-4PH H1150 bar

(OP)
Worldtraveller; Thank you for your recommendations. It is good to know someone with the capability to do the necessary tests; unfortunately this project is time sensitive and resource driven. Long story short as you suggested, we are considering 15-5PH H1025 for the future, higher Ftu/Fty with S/N curve equations…

Cheers,
Artur

RE: Fatigue life of 17-4PH H1150 bar

(OP)
Taylor; Excellent news! One hiccup, I have a PDF of ASMH 1972 from Air Force Material Laboratory / AD737970, obviously this is not the one you are referring to. Could you help me out with the publisher or with the figure, if that is not proprietary or copy righted information. The load in my case is R=0, however the data would allow me to draw a correlation (at least attempt to) between H1100 and H1150.

Many thanks,
Artur

RE: Fatigue life of 17-4PH H1150 bar

APRRK...

I have a copy of a ~20-YO ASMH Hdbk. The examples listed are not full extent of data for H1150 fatigue data. I am not comfortable copying/pasting that data [SN figures], here.

NOTE.

Several years ago the ASMH was handed-over to industry for maintenance and updates.... and has been renamed as Aerospace Structural Metals Database. Subscription costs are 'significant'.... however many libraries still have the older ASMH on shelves [or on-line].

In real terms the ASMD [ASMH] along with MMPDS... would replace a corporate-developed metals database/design handbook series with highly authoritative data recognized by the FAA and DoD.... assuming industry standards and practices for aerospace metals specifications and basic heat treatments, etc.

CINDAS https://cindasdata.com/products/asmd

1501 = ASMH designation for 17-4PH CRES, all forms.

other examples...

1309 = 347 & 348 CRES [all forms]

3203 = 2024 aluminum bare/wrought products

3222 = 7050 aluminum [all]

3505 = HM31A magnesium [all]

4103 = Inconel 718

Etc.

Regards, Wil Taylor

o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

RE: Fatigue life of 17-4PH H1150 bar

(OP)
Thank you Wil! Pointing me in the right direction is a huge help.

Best regards,
Artur

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