Abstract
To prevent hot-cracking, austenitic stainless steel welds generally contain a small percent of delta ferrite. Although ferrite has been found to effectively prevent hot-cracking, it can lead to embrittlement of welds when exposed to elevated temperatures. The aging behavior of type-308 stainless steel weld has been examined over a range of temperatures 400–850‡C for times up to 10,000 hr. Upon aging, and depending on the temperature range, the unstable ferrite may undergo a variety of solid state transformations. These phase changes affect creep-rupture and Charpy impact properties.
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J. M. Vitek, S. A. David, and D. J. Alexander, Oak Ridge National Laboratory, Oak Ridge, TN (1995).
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David, S.A., Vitek, J.M. & Alexander, D.J. Embrittlement of austenitic stainless steel welds. J Nondestruct Eval 15, 129–136 (1996). https://doi.org/10.1007/BF00732040
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DOI: https://doi.org/10.1007/BF00732040