Residual Stress in 316 Solution Annealed Bar Stock

[beh188]

I am trying to understand the type of residual stresses that are contained in a standard piece of 316 bar stock that has been solution annealed. Because the bar stock is quenched after heat treatment it seems to me there would be a similar phenomenon in tempered glass, where the outside cools faster than the inside causing residual compressive stress on the surface.

Is there residual stress contained in 316 solution annealed bar stock, and does this stress ever cause problems during machining. Perhaps problems with machining large or small parts, or parts of a particular geometry. What is the method this stress is formed. Is it formed because of different cooling rates of the part?

Thanks.

 

[Metaljon]

No I don't think there would be any significant residual stress in the stainless after solution annealing and quenching.

 

[arunmrao]

In temper glass,which is non crystalline,the structure will be different. Austenitic stainless steels during the quenching process retain carbides in solution and we have austenitic structure. Such residual stresses is rarely occurring in uniform cross section products.There is no phase change occurring like in the case of carbon steels when there is austenite to martensite transformation. Hope, I am not confusing you.

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[EdStainless]

There is residual stress from the quenching process, though the greater source is from straightening. In bar these stresses will be fairly uniform. Unless you are machining a very asymmetric part I don't think that you will have much of an issue.

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