×
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

Cylinder head failure

Cylinder head failure

Cylinder head failure

(OP)
What are the dark areas on the fracture surface of an aluminum die casting?

RE: Cylinder head failure

Any pictures? They say a 1000 words.


Politicians like to panic, they need activity. It is their substitute for achievement.

RE: Cylinder head failure

They might be carbon.

RE: Cylinder head failure

Got any pix of the entire cylinder head ? Engine, air compressor, vacuum pump, or ???

RE: Cylinder head failure

Areas cracked first and carbon forced in the crack. Anything in that photo looked like shadows from lack of light to me.

RE: Cylinder head failure

(OP)
Thank you all for the replies.
Apologize for the poor photo of this small piece. I've seen this failure before on a non engine application. It was a structural member that failed exhibiting the dark areas on the fracture surface. It was due to a casting defect from the producer but can't remember what was wrong in the casting process. The producer eventually fixed the problem.

RE: Cylinder head failure

It just looks like the fracture is dirty. Try sticking it in an ultrasonic cleaner for about 30 seconds.

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