The Interface Character Distribution and Intergrannular Corrosion Resistance of Duplex Stainless Steel UNS S32304

The duplex stainless steels (UNS S32304) after solid solution annealing at two different temperature (1323K and 1573K) were subjected to the same cold rolling with ε =3 and subsequent annealing for 230 min at 1323 K . The corresponding interface character distribution (ICD) were determined by electron backscatter diffraction (EBSD). The results show that a larger population of phase boundaries (PB) having K-S orientation relationship (OR) between the neighboring δ and γ grains was introduced and therefore higher intergrannular corrosion resistance (ICR) were resulted in the specimen initially solid-solution annealed at 1573K.

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Examination of the Orientation Relationships between the Main Phases of Duplex Stainless Steel by EBSD

Materials Science Forum ◽

10.4028/www.scientific.net/msf.537-538.297 ◽

2007 ◽

Vol 537-538 ◽

pp. 297-302

Author(s):

Tibor Berecz ◽

Péter János Szabó

Keyword(s):

Stainless Steel ◽

Duplex Stainless Steel ◽

Stainless Steels ◽

Electron Backscatter Diffraction ◽

Duplex Stainless Steels ◽

Alloying Elements ◽

Orientation Relationships ◽

Σ Phase ◽

Electron Backscatter ◽

Backscatter Diffraction

Duplex stainless steels are a famous group of the stainless steels. Duplex stainless steels consist of mainly austenitic and ferritic phases, which is resulted by high content of different alloying elements and low content of carbon. These alloying elements can effect a number of precipitations at high temperatures. The most important phase of these precipitation is the σ-phase, what cause rigidity and reduced resistance aganist the corrosion. Several orientation relationships have been determined between the austenitic, ferritic and σ-phase in duplex stainless steels. In this paper we tried to verify them by EBSD (electron backscatter diffraction).

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Influence of the grain orientation spread on the pitting corrosion resistance of duplex stainless steels using electron backscatter diffraction and critical pitting temperature test at the microscale

Corrosion Science ◽

10.1016/j.corsci.2012.11.013 ◽

2013 ◽

Vol 68 ◽

pp. 275-278 ◽

Cited By ~ 37

Author(s):

V. Vignal ◽

D. Ba ◽

H. Zhang ◽

F. Herbst ◽

S. Le Manchet

Keyword(s):

Corrosion Resistance ◽

Stainless Steels ◽

Grain Orientation ◽

Electron Backscatter Diffraction ◽

Pitting Corrosion Resistance ◽

Electron Backscatter ◽

Critical Pitting Temperature ◽

Grain Orientation Spread ◽

Backscatter Diffraction ◽

Temperature Test

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Twin and topotactic growth of β-eucryptite dendrites and their lattice coincidence analysed by the reticular theory

Journal of Applied Crystallography ◽

10.1107/s0021889812047553 ◽

2013 ◽

Vol 46 (1) ◽

pp. 216-223

Author(s):

Shan-Rong Zhao ◽

Hai-Jun Xu ◽

Rong Liu ◽

Qin-Yan Wang ◽

Xian-Yu Liu

Keyword(s):

Solid Solution ◽

Crystallographic Orientation ◽

Electron Backscatter Diffraction ◽

Electron Backscatter ◽

Ebsd Technique ◽

Backscatter Diffraction ◽

Orientation Determination

Snowflake-shaped dendrites of β-eucryptite–β-quartz solid solution were artificially crystallized in a matt glaze, and the crystallographic orientation of the dendrites was analysed by the electron backscatter diffraction (EBSD) technique. The six branches of a snowflake-shaped dendrite in the plane (0001) are along 〈110〉. From the orientation determination, a twin relationship and a topotactic relationship between dendrites were found. The twin axes are [011], [0{\overline 1}1] and [210], and the twin planes perpendicular to the twin axes are ({\overline 1}2{\overline 1}2) and (1{\overline 2}12). From the reticular theory of twinning, it was calculated that the twin indexn= 2 and the obliquity ω = 3.2877°. The studied dendrite is a twin by reticular pseudomerohedry with low twin index and obliquity. In the topotactic growth, no twin elements have been found, but the three main crystallographic directions 〈001〉, 〈210〉 and 〈110〉 of the two dendritic crystals overlap each other. The degree of lattice coincidence between the two crystals in this topotactic growth is also discussed.

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