Journal ArticleDOI
X-ray line broadening from filed aluminium and wolfram
G.K Williamson,W.H Hall +1 more
TLDR
In this paper, the authors used a Geiger counter spectrometer to measure the changes in intensity distribution in the spectra of cold worked aluminium and wolfram and found that the line breadths may be attributed to simultaneous small particle size and strain broadening, the latter predominating at the higher Bragg angles.About:
This article is published in Acta Metallurgica.The article was published on 1953-01-01. It has received 7802 citations till now.read more
Citations
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Journal ArticleDOI
Bulk nanostructured materials from severe plastic deformation
TL;DR: In this article, the authors present methods of severe plastic deformation and formation of nanostructures, including Torsion straining under high pressure, ECA pressing, and multiple forging.
Journal ArticleDOI
III. Dislocation densities in some annealed and cold-worked metals from measurements on the X-ray debye-scherrer spectrum
G. K. Williamson,R. E. Smallman +1 more
TL;DR: In this article, two basic equations are derived for deducing the dislocation density in powdered materials from the particle size and strain breadth measured from the Debye-Schemer spectrum.
Journal ArticleDOI
Advances in the development of novel cobalt Fischer-Tropsch catalysts for synthesis of long-chain hydrocarbons and clean fuels.
Journal ArticleDOI
Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics
Eric T. Hoke,Daniel J. Slotcavage,Emma R. Dohner,Andrea R. Bowring,Hemamala I. Karunadasa,Michael D. McGehee +5 more
TL;DR: A reversible photo-induced instability has been found in mixed-halide photovoltaic perovskites that limits the open circuit voltage in solar cells.
Journal ArticleDOI
A precipitation-hardened high-entropy alloy with outstanding tensile properties
Junyang He,Hao Wang,He Huang,Xiandong Xu,Mingwei Chen,Yuan Wu,Xiongjun Liu,T.G. Nieh,Ke An,Zhaoping Lu +9 more
TL;DR: In this paper, the authors demonstrate the possibility to precipitate a coherent reinforcing phase in a fcc-FeCoNiCr HEA matrix using minor additions of Ti and Al, and demonstrate that extraordinary balanced tensile properties at room temperature were achieved, which was due to a well combination of various hardening mechanisms, particularly precipitation hardening.
References
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Journal ArticleDOI
The Effect of Cold‐Work Distortion on X‐Ray Patterns
B. E. Warren,B. L. Averbach +1 more
TL;DR: In this article, a cosine Fourier series and a set of An coefficients determined by measuring several orders of a given plane is used to obtain a distribution function of the strains directly from a Fourier transform of the An coefficients.
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A Correction for the α1 α2 Doublet in the Measurement of Widths of X-ray Diffraction Lines
Journal ArticleDOI
On the Dislocation Theory of Plastic Deformation
TL;DR: In this article, a detailed study has been made of the lattice imperfections which are assumed to account for plastic deformation, and it is shown that about twice as much energy is required to produce a certain amount of slip inside a solid as is required at the surface.
Journal ArticleDOI
A Theory of the Strength of Metals
TL;DR: In this paper, it was pointed out that there is no elastic limit in a typical plastic metal, since the apparent stress at which the metal begins to yield depends upon the sensitivity of the means for detecting very small rates of flow.