Welding of Precipitation Hardening Nickel Alloys
Welding of Precipitation Hardening Nickel Alloys
(OP)
Hi All,
I am after advise or pointing in the correct direction of literature regarding the above.
We have some nickel alloy parts to be welded and I beleive this is best carried out in the soltion annealed condition. I am trying to understand the best process to carry out after welding, i.e straight to age hardening or another solution anneal followed by age hardening.
I have researched online and found that it may be beneficial to carry out another full solution anneal, but i am concerned this may affect the final grain size of the parts.
Should I shorten the solution ageing time based on the initial pre-weld solution anneal, or discount the second solution anneal altogehter and go direcly to ahe hardeninig after welding.
For information, I am using Alloy 925
Thanks all for any assistance
I am after advise or pointing in the correct direction of literature regarding the above.
We have some nickel alloy parts to be welded and I beleive this is best carried out in the soltion annealed condition. I am trying to understand the best process to carry out after welding, i.e straight to age hardening or another solution anneal followed by age hardening.
I have researched online and found that it may be beneficial to carry out another full solution anneal, but i am concerned this may affect the final grain size of the parts.
Should I shorten the solution ageing time based on the initial pre-weld solution anneal, or discount the second solution anneal altogehter and go direcly to ahe hardeninig after welding.
For information, I am using Alloy 925
Thanks all for any assistance





RE: Welding of Precipitation Hardening Nickel Alloys
Here is a good link
https://books.google.com/books?id=eOYGZaZMIhcC&...
see 7.9.2
RE: Welding of Precipitation Hardening Nickel Alloys
The second anneal would be done at shorter times if it was needed.
A lot of this depends on the weld filler and you heat input.
You may need to run some tests and see what you get for strength and toughness.
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P.E. Metallurgy, Plymouth Tube
RE: Welding of Precipitation Hardening Nickel Alloys
I will take the information provided and carry out further assessment of the project
RE: Welding of Precipitation Hardening Nickel Alloys
Welding of Precipitation harednable Nickel Alloys are much difficult than solid solution type of alloys.In fact the later type of alloys are more popular to a wide spectrum of industries.As the other gentlemen have already pointed out: prior annealing definitely helps to improve the ductility of BM, facilitating crack free welds.
You may follow the guidelines of this document:http://www.specialmetals.com/assets/documents/allo....
Information provided in Page 7 & 8 would be of help.Depending on the requirements you may choose the extent of Pre & post weld heat treatment.
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist
Ontario,Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299
RE: Welding of Precipitation Hardening Nickel Alloys
Are friction welding and/or flash welding practical for PH CRES and or high nickel [HRA] alloys?
Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]
RE: Welding of Precipitation Hardening Nickel Alloys
We couldn't FW it in the aged condition because it had too high of hot strength, so no deformation.
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P.E. Metallurgy, Plymouth Tube
RE: Welding of Precipitation Hardening Nickel Alloys
What about Flash Welding in the SHT condition... then PHT?
Done most of my work with LA Steel and Aluminum alloys.
Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]
RE: Welding of Precipitation Hardening Nickel Alloys
Seek and ye shall find...............
http://www.asminternational.org/documents/10192/18...