×
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

Hydrogen Embrittlement of Music Wire
2

Hydrogen Embrittlement of Music Wire

Hydrogen Embrittlement of Music Wire

(OP)
Does anyone know of a case where a music wire spring failed due to hydrogen embrittlement?

RE: Hydrogen Embrittlement of Music Wire

Not if it wasn't plated, or immersed in warm H2...

RE: Hydrogen Embrittlement of Music Wire

Even some acid cleaning operations will cause it.  And of course if there is any active corrosion you can get Hydrogen.
Springs are always baked out after forming.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Hydrogen Embrittlement of Music Wire

(OP)
My reason for asking, Ed, is that music wire is not a martensitic structure, it is patented (fine pearlitic structure).

RE: Hydrogen Embrittlement of Music Wire

2
swall,

Pearlitic microstructures are not immune to the effects of hydrogen.  They are more resistant to brittle fracture than martensitic microstructures, but they are affected, usually by hydrogen-enhanced decohesion/delamination of the pearlite lamellae.  There are a number of good references on the subject, such as the following:

Microstructural aspects upon hydrogen environment embrittlement of various bcc steels
http://www.sciencedirect.com/science/article/pii/S0360319909016905

Microstructural aspects upon hydrogen environment embrittlement of various bcc steels
http://www.springerlink.com/content/l6085880468784m8/

Hydrogen assisted cracking in progressively drawn pearlitic steel
http://www.sciencedirect.com/science/article/pii/S0010938X07000741

Microstructure-based modeling of hydrogen assisted cracking in pearlitic steels
http://www.sciencedirect.com/science/article/pii/S0921509301010371

Evaluation Method for Delayed Fracture Susceptibility of Steels and Development of High Tensile Strength Steels with High Delayed Fracture Resistance
http://www.nsc.co.jp/en/tech/report/pdf/8011.pdf

RE: Hydrogen Embrittlement of Music Wire

(OP)
Thanks, TVP. That will keep me occupied for a while.

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