Deformation kinetics of a TRIP steel determined by in situ high-energy synchrotron X-ray diffraction

X-rays are ideal to study the structure of crystals due to their weak interaction with matter and in most cases allow a quantitative analysis using kinematical theory. To study the incorporation of atoms during crystal growth and to analyze the kinetics on the crystal surface high primary beam intensities available at synchrotrons are required. Our studies of the molecular beam epitaxy growth of III–V semiconductors reveal that, despite their similarity in crystal structure, the surface kinetics of GaAs (001), InAs (001) and GaSb (001) differ strongly. GaAs shows an unexpectedly large coarsening exponent outside the predicted range of Ostwald ripening models during recovery. GaSb exhibits dramatically different surface morphology variations during growth and recovery. Overgrowth of GaAs by epitaxial MnAs demonstrates the ability of X-ray diffraction to follow an interface as it is buried during heteroepitaxy, which is not possible by reflection high-energy electron diffraction.

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Recrystallization of AA1050 Studied by 3DXRD

Materials Science Forum ◽

10.4028/www.scientific.net/msf.519-521.1569 ◽

2006 ◽

Vol 519-521 ◽

pp. 1569-1578

Author(s):

Dorte Juul Jensen

Keyword(s):

Single Crystals ◽

High Energy ◽

Nucleation And Growth ◽

X Rays ◽

X Ray Diffraction ◽

Orientation Relationships ◽

X Ray ◽

3 Dimensional ◽

Kinetics Of

By 3 dimensional X-ray diffraction (3DXRD) using high energy X-rays from synchrotron sources it is possible to study in-situ the nucleation and growth during recrystallization. In this paper it is described and discussed how 3DXRD can supplement EBSP measurements of nucleation and growth. Three types of studies are considered: i) orientation relationships between nuclei and parent deformed matrix, ii) recrystallization kinetics of individual bulk grains and iii) filming of growing grains in deformed single crystals.

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In situ studies on the kinetics of formation and crystal structure of In4Sn3O12 using high-energy x-ray diffraction

Journal of Applied Physics ◽

10.1063/1.2969913 ◽

2008 ◽

Vol 104 (4) ◽

pp. 043520 ◽

Cited By ~ 12

Author(s):

G. B. González ◽

J. S. Okasinski ◽

T. O. Mason ◽

T. Buslaps ◽

V. Honkimäki

Keyword(s):

Crystal Structure ◽

High Energy ◽

X Ray Diffraction ◽

X Ray ◽

In Situ Studies ◽

Kinetics Of Formation ◽

Kinetics Of

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In situ high-energy synchrotron X-ray diffraction revealing precipitation reaction kinetics of silver ions with mixed halide ions

Journal of Materials Chemistry C ◽

10.1039/c5tc01306b ◽

2015 ◽

Vol 3 (28) ◽

pp. 7492-7498 ◽

Cited By ~ 7

Author(s):

Qi Liu ◽

Zheng Li ◽

John S. Okasinski ◽

Yang Ren ◽

Yugang Sun

Keyword(s):

Reaction Kinetics ◽

Silver Ions ◽

High Energy ◽

Precipitation Reaction ◽

Halide Ions ◽

X Ray Diffraction ◽

X Ray ◽

Kinetics Of

Quantitative reaction kinetics involved in the precipitation of silver ions with mixed halogen ions that are capable of forming uniform silver chlorobromide nanocubes has been studied by in situ high-energy synchrotron X-ray diffraction.

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In-Situ High-Energy X-ray Diffraction Study of Austenite Decomposition During Rapid Cooling and Isothermal Holding in Two HSLA Steels

Metallurgical and Materials Transactions A ◽

10.1007/s11661-021-06192-x ◽

2021 ◽

Vol 52 (5) ◽

pp. 1812-1825

Author(s):

Sen Lin ◽

Ulrika Borggren ◽

Andreas Stark ◽

Annika Borgenstam ◽

Wangzhong Mu ◽

...

Keyword(s):

Isothermal Holding ◽

Weight Percent ◽

High Energy ◽

Decomposition Kinetics ◽

Bainitic Transformation ◽

Austenite Decomposition ◽

X Ray Diffraction ◽

Rapid Cooling ◽

X Ray

AbstractIn-situ high-energy X-ray diffraction experiments with high temporal resolution during rapid cooling (280 °C s−1) and isothermal heat treatments (at 450 °C, 500 °C, and 550 °C for 30 minutes) were performed to study austenite decomposition in two commercial high-strength low-alloy steels. The rapid phase transformations occurring in these types of steels are investigated for the first time in-situ, aiding a detailed analysis of the austenite decomposition kinetics. For the low hardenability steel with main composition Fe-0.08C-1.7Mn-0.403Si-0.303Cr in weight percent, austenite decomposition to polygonal ferrite and bainite occurs already during the initial cooling. However, for the high hardenability steel with main composition Fe-0.08C-1.79Mn-0.182Si-0.757Cr-0.094Mo in weight percent, the austenite decomposition kinetics is retarded, chiefly by the Mo addition, and therefore mainly bainitic transformation occurs during isothermal holding; the bainitic transformation rate at the isothermal holding is clearly enhanced by lowered temperature from 550 °C to 500 °C and 450 °C. During prolonged isothermal holding, carbide formation leads to decreased austenite carbon content and promotes continued bainitic ferrite formation. Moreover, at prolonged isothermal holding at higher temperatures some degenerate pearlite form.

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