Dynamic strain aging in Haynes 282 superalloy
Paper i proceeding, 2014

Haynes 282 is a newly introduced Ni-based superalloy, developed to provide a combination of high-temperature mechanical properties, thermal stability and processability. The present contribution investigates the effect of dynamic strain aging (DSA) on the deformation behaviour of Haynes 282 during monotonic and cyclic loading. It is shown that DSA (presumably related to carbon diffusion based on rough estimates of the activation energy) completely dominates the development of the stress during cycling at intermediate temperatures, leading to extensive cyclic hardening and serrated yielding. However, no clear effects on the fatigue life or the resulting dislocation structure could be observed. The tensile properties were not severely affected, in spite of the presence of extensive serrated yielding, although a reduction in ductility was observed in the DSA temperature regime. During monotonic loading at lower strain rates indications of an additional DSA mechanism due to substitutional elements were observed.

Författare

Magnus Hörnqvist

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Ceena Joseph

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Christer Persson

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Jonathan Weidow

Chalmers, Teknisk fysik, Materialens mikrostruktur

Haiping Lai

Chalmers, Teknisk fysik, Materialens mikrostruktur

Proceedings of the 2nd EuroSuperalloys Conference

2261-236X (ISSN)

Vol. 14 Art. no. 16002-

Ämneskategorier

Materialteknik

Annan materialteknik

Styrkeområden

Materialvetenskap

DOI

10.1051/matecconf/20141416002

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Senast uppdaterat

2018-10-15