×
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

Decomposition of solute concentration in Fe-Cr-C alloy

Decomposition of solute concentration in Fe-Cr-C alloy

Decomposition of solute concentration in Fe-Cr-C alloy

(OP)
Say, I have a 0.1 % C and 18 % Cr in a Fe-alloy. At a particular temperature, we have precipitate formation (of Cr23C6), eating many Cr atoms. At a given temperature , How do I evaluate the remaining Cr atoms in the alloy ?

RE: Decomposition of solute concentration in Fe-Cr-C alloy

The rest of the Cr atoms will be just fine. They are not the weak link.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: Decomposition of solute concentration in Fe-Cr-C alloy

Convert to atomic percent, multiply C x 23/6 to figure out how much Cr is tied up.
The subtract from the original C and convert back to wt%.

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

RE: Decomposition of solute concentration in Fe-Cr-C alloy

I've done that math previously, and a little C can tie up a whole lot of Cr in terms of percent mass!

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: Decomposition of solute concentration in Fe-Cr-C alloy

So roughly 52/12 x 010 = 0.43 wt % Cr

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

RE: Decomposition of solute concentration in Fe-Cr-C alloy

0.10 x 23/6 x 52/12 = 1.66

(wt% C x Atomic ratio x Atomic weight ratio = wt% Cr)

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: Decomposition of solute concentration in Fe-Cr-C alloy

duh, thanks IM.

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

RE: Decomposition of solute concentration in Fe-Cr-C alloy

First thing I've ever seen you get wrong, Ed!

(It's always the simplest question on the exam I screw up.)

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

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