Deformation-induced martensitic transformation behavior in cold-rolled and cold-drawn type 316 stainless steels
Abstract
We investigate deformation-induced martensitic transformation behavior in cold-rolled and cold-drawn specimens of type 316 stainless steel. Deformation-induced martensite preferentially nucleates at the twin boundary between the austenite matrix and a deformation twin. In the cold-rolled specimen, martensite formed at the twin boundary has a Kurdjumov-Sachs (K-S) relationship with both the austenite matrix and the deformation twin ("double K-S relationship"). In the cold-drawn specimen, two kinds of deformation twins with different twin planes are typically formed, and therefore deformation-induced martensites are formed where the deformation twin boundaries intersect: martensite thus has an imperfect "triple K-S relationship" with the austenite matrix and the two deformation twins. The complicated crystallographic orientation relationship between austenite and martensite grains strongly restricts the formation of some variants of deformation-induced martensites. Because of the difference in number of nucleation sites in the cold-drawn and cold-rolled specimens, martensitic transformation is more enhanced in the former than in the latter.
- Publication:
-
Acta Materialia
- Pub Date:
- 2010
- DOI:
- 10.1016/j.actamat.2009.10.004
- Bibcode:
- 2010AcMat..58..895N
- Keywords:
-
- Austenitic stainless steel;
- Deformation-induced martensite;
- Deformation twin;
- Variant restriction