×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Zamak 5 vs ZA8 - need help understanding phase transformation

Zamak 5 vs ZA8 - need help understanding phase transformation

Zamak 5 vs ZA8 - need help understanding phase transformation

(OP)
I am changing over from Zamak 5 to ZA8 for additional creep performance and to mitigate some issues with hot tears due to a large steel core.

One question i can't answer is where is the extra aluminum going? Zamak5 and ZA8 are essentially the same alloy except ZA8 has 8% Al vs. only 4% for Zamak 5.

From the zinc handbook, it looks like only 1% of the aluminum can make it into the solid solution of zinc, and the remaining 7% goes somewhere else.

Also, i age these parts for a bit and am trying to figure out exactly what happens during the age process. i now that something precipitaes out of the solid solution but stays in that area, but what happens to the eutectic all around it?

In what Form is most of the Aluminum and how do Zamak 5 and ZA8 contrast in this respect?

ZA8 has proven in experiments i have run to be far superior against cracking.

http://home.comcast.net/~jcheck10/zaphase.gif

Thanks very much.

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!


Resources