On the structural characterization of precipitates in boron microalloyed steels

Boron alloying has been recognized in the past as a very attractive method for improving the properties of high strength low alloy (HSLA) steels. Small additions of this element have pronounced effects on the hardenability of the steels. Partial explanations on this effect are based on theoretical models which suggest segregation of boron in particular areas of the microstructure such as grain boundaries or precipitates. The detection of boron in steels has so far proved to be difficult due to the small amounts of boron involved and also to the fact of being a light element and therefore difficult to be detected by X-ray microanalysis and transmision electron microscopy.

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Uncovering the structures of modular polyketide synthases

Natural Product Reports ◽

10.1039/c4np00098f ◽

2015 ◽

Vol 32 (3) ◽

pp. 436-453 ◽

Cited By ~ 45

Author(s):

Kira J. Weissman

Keyword(s):

Electron Microscopy ◽

Structural Biology ◽

Structural Characterization ◽

Small Angle ◽

Single Particle ◽

Polyketide Synthases ◽

X Ray ◽

X Ray Scattering ◽

Cryo Electron Microscopy

This review covers a breakthrough in the structural biology of the gigantic modular polyketide synthases (PKS): the structural characterization of intact modules by single-particle cryo-electron microscopy and small-angle X-ray scattering.

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Structural Characterization of Fission Products in Irradiated TRISO Fuels using Transmission Kikuchi Diffraction, Transmission Electron Microscopy, and Synchrotron X-ray Absorption Spectroscopy

Microscopy and Microanalysis ◽

10.1017/s1431927617011801 ◽

2017 ◽

Vol 23 (S1) ◽

pp. 2228-2229

Author(s):

Rachel L. Seibert ◽

Jeff Terry ◽

Chad M. Parish ◽

John D. Hunn ◽

Charles A. Baldwin ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Absorption Spectroscopy ◽

Structural Characterization ◽

Fission Products ◽

X Ray ◽

Transmission Electron ◽

X Ray Absorption

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Characterization of Microstructure in High Strength Microalloyed Steels Using Quantitative X-Ray Diffraction

2008 7th International Pipeline Conference, Volume 3 ◽

10.1115/ipc2008-64643 ◽

2008 ◽

Cited By ~ 1

Author(s):

X. Li ◽

J. B. Wiskel ◽

H. Henein ◽

D. G. Ivey ◽

O. Omotoso

Keyword(s):

Mechanical Properties ◽

Rietveld Method ◽

Domain Size ◽

High Strength ◽

Preferred Orientation ◽

Microalloyed Steels ◽

X Ray Diffraction ◽

X Ray ◽

X80 Steels

The mechanical properties of microalloyed steels used in pipelines are strongly affected by microstructure. In this paper, X-ray diffraction (Rietveld method) was used to quantify the microstructure — specifically domain size, microstrain and preferred orientation — for four X80 steels and three experimental X100 steels. Measurements were made at the surface and at several positions below the surface. Nano-sized domains were obtained for all steels tested. A smaller domain size, higher microstrain and stronger preferred orientation were observed in the X100 samples relative to the X80 steels.

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