Microstructure Investigations of Phase Transformation in Cold Working Austenitic Stainless Steel AISI 316L
Abu Khalid Rivai (a*), Nanda Shabrina (a), Bambang Sugeng (a), Sulistioso Giat Sukaryo (a)

a) Center For Science and Technology of Advanced Materials, BATAN, Kawasan PUSPIPTEK Gedung 43, Tangerang Selatan, Banten 15314, Indonesia
*rivai.abukhalid[at]batan.go.id

Abstract

Development of high temperature and corrosion-resistant materials is one of the key issues for the deployment of advanced nuclear reactors and also to accommodate the problem that occurred in the conventional reactor as the lesson-learned from Fukushima Daiichi nuclear reactor power plant accident. One of the high performance materials for that purpose is Duplex Stainless Steels (DSSs) which are a family of stainless steels. The metallurgical structure of the DSSs consists of two phases i.e. austenite (FCC: Face-Centered Cubic lattice) and ferrite (BCC: Body Centered Cubic lattice). Therefore, DSSs have properties characteristic of both austenitic and ferritic stainless steels. Furthermore, DSSs are also magnetic because of the ferrite phase existing. The cold working of AISI 316L at various percentage reduction of 5%, 10%, 15%, 25% and 38% have been done. Afterward, the sample was characterized using X-ray diffraction and Scanning Electron Microscope-Energy Dispersive Spectroscope to analyze the microstructure characteristics and phase transformation. The results showed that the percentage ferrite phase was increasingly growth related to the increasing of the percentage of cold working percentages value i.e. 2.7%, 8.3%, 21.8% 29.6% and 37.1%, respectively. Therefore, AISI 316L is potentially developed for the DSS material.

Keywords: Duplex, steel, AISI 316L, austenite, ferrite

Topic: Nuclear Science and Engineering