The influence of austenite texture on the martensitic transformation of an austenitic stainless steel

• Published in: Journal of alloys and compounds 2013-11, Vol.577, p.S609-S613
• Main Authors: Hilkhuijsen, P., Geijselaers, H.J.M., Bor, T.C.
• Format: Article
• Language: English
• Subjects: Austenite; Austenite γ; Austenitic stainless steels; Driving force; Martensite; Martensite α; Martensitic transformations; ODF; Phase transformations; Rolling direction; Strain direction; Stress induced transformation; Surface layer; Texture; Transformations; Transverse direction; XRD
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2012.02.147

► Highly textured austenitic stainless steel show different transformation behavior at different strain paths. ► The ‘stress induced transformation’ theory can be used to describe these differences. ► The austenite texture evolution due to transformation can be predicted. Uniaxial tensile tests on a highly textured, fully austenitic stainless steel were performed in the transverse and rolling directions. Differences in overall material and transformation behavior were observed: transformation from the austenite (γ) phase to the martensite (α′) phase during a test in the transverse direction occurred at a higher strain and stress and reached a lower ultimate fraction of martensite as compared to the rolling direction. The ‘stress induced transformation’ theory was combined with the measured austenite texture prior to deformation to explain the observed behavior. XRD measurements of the austenite texture after deformation in the rolling and transverse direction were performed to support the theory.