linear indication
09-11-2006, 06:14 AM, (This post was last modified: 10-05-2006, 11:15 AM by Gordon.)
#1
linear indication
We rough machined the Incoloy 909 in the solution condition. Then perform aging heat treatment, final machining and FPI. However many linear indication found and those indication is about 0.010 inch to 0.020 inch. We had machined this material for many years and never encounter this problem. We do not know how this occurred.

[Image: 060911_62_1small.jpg]
Click to enlarge

Are those linear indications caused by machining, heat treatment process, forging process or material problems?
Has anyone suggest us a right way to solve this trouble?

Thanks in advance!

Simon
Reply
09-11-2006, 10:49 AM,
#2
RE: linear indication
Hi Simon

Welcome to the Surface Engineering Forum. Sorry for the problems of getting your first post here. Below is a link for a larger image.

Simonlee's larger image
Reply
09-11-2006, 05:44 PM,
#3
RE: linear indication
Hi Simon

Assuming FPI stands for fluorescent penetrant inspection. Considering the size of the these artefacts I would imagine it would initially appear by eye more like porosity than cracks using FPI. Have you tried polishing these out, one to get a better view and two to get a sense of their depth. Have you examined the material at stages before machining/heat treatment etc., to determine when the problem is first occurring.
Reply
09-13-2006, 07:05 AM,
#4
RE: linear indication
Hi Simon

try ask for solve this trouble on info@specialmetals.com

Regards Vladimir
Reply
09-13-2006, 12:58 PM,
#5
RE: linear indication
Vladimir Wrote:Hi Simon

try ask for solve this trouble on info@specialmetals.com

Regards Vladimir

Thank you Vladimir and Welcome to the Surface Engineering Forum.

Good link for general info on nickel based alloys and some useful pdf papers.

Simon, I think Vladimir's suggestion is good. These people, if any, may have information on this problem. Please let us know how you get on.
Reply
09-14-2006, 05:42 AM,
#6
RE: linear indication
Gordon Wrote:
Vladimir Wrote:Hi Simon

try ask for solve this trouble on info@specialmetals.com

Regards Vladimir

Thank you Vladimir and Welcome to the Surface Engineering Forum.

Good link for general info on nickel based alloys and some useful pdf papers.

Simon, I think Vladimir's suggestion is good. These people, if any, may have information on this problem. Please let us know how you get on.


Thanks.
If I got informations from SPECIAL METALS, I'll post again.

Best Regards
Simon
Reply




Possibly Related Threads…
Thread Author Replies Views Last Post
  Crack indication Stellite 1 HVOF achmadarifudinh 4 1,419 02-20-2019, 03:13 AM
Last Post: Stephen Booth



Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd