Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 394, Issue 1, Pages 34-38Publisher
ELSEVIER
DOI: 10.1016/j.jnucmat.2009.08.002
Keywords
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Funding
- National Basic Research Program of China [2007CB209803]
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Serrated flow behavior of the AL6XN austenitic stainless steel has been investigated at different temperatures and strain rates. The results show the serrated flow, peak/plateau in flow stress and negative strain rate sensitivity appearing in tensile deformation of the AL6XN steel at 773-973 K and 3.3 x 10(-5)-3.3 x 10(-3) s(-1) (excluding 873 K. 3.3 x 10(-5) s(-1)), suggesting the occurrence of dynamic strain aging (DSA). The activation energy for type-A and -(A + B) serrations was calculated to be 304 kJ/mol and diffusion of substitutional solutes, such as chromium and molybdenum is considered as the mechanism of serrated flow. TEM observations further revealed a typical planar slip mode in the regime of DSA of the deformed AL6XN steel. (C) 2009 Elsevier B.V. All rights reserved.
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