Texture Characterization of Duplex Stainless Steel 2205 Using Neutron Diffraction Method

Abstract

Duplex stainless steel (DSS) is a type of stainless steel that’s used in the medical and industrial such as petrochemical, oil and gas, and pharmaceutical because it has an excellent corrosion resistance and high strength. Some characterization has been carried out to know the characteristic of DSS. Characterization using neutron diffraction method by means of BATAN’s texture diffractometer DN2 was performed on a DSS series 2205 sample. From crystal structure and phase analysis, the sample has dual phases,ferrite α-phase BCC and austenite -phase FCC as it is well known. It is found that lattice parameters of ferrite and austenite are 2.8736 A and 3.6076 A, respectively. Preferred orientation (G1) for ferrite and austenite are (-2.14 ± 0.03) and (0.35 ± 0.03), respectively. Pole figures refinement was calculated using triclinic to the orthorhombic sample symmetrization. From the calculation, some results are obtained. By using pole figures (110), ( 200), and (211), it is found ferrite α-phase component is oriented to {110} Goss orientation., and using the pole figures (111), (200), and (220), the austenite -phase component is oriented to {100} Cube orientation. Orientation distribution function (ODF) is calculated using Arbitrarily Defined Cells (ADC) method or direct method in the Euler angle space (1, Φ, 2). From the ODF calculation, the ferrite α-phase components, {110} Goss orientation has (ODF) = 30,737 m.r.d. The largest ODF = 32,108 m.r.d. has orientation in the basic region (110)[001] in the Euler angle space (1, Φ, 2) = (90,90,45). For the austenite -phase components {100} Cube orientation, the (ODF) = 5,149 m.r.d. is obtained. The highest ODF values, in the basic region of (010) [100] and (100) [0-10] orientation have the Euler angle space (1, Φ, 2) = (0, 90, 0) and (0, 90, 90), respectively, both have ODF = 5,224 m.r.d