A Crystallographic Analysis of the Ductile-Brittle Transition In Body-Centered Cubic Single Crystals

JOM ◽  
1953 ◽  
Vol 5 (12) ◽  
pp. 1650-1651
Author(s):  
A. J. Opinsky
Keyword(s):  
Single Crystals ◽  
Crystallographic Analysis ◽  
Body Centered Cubic ◽  
Brittle Transition

Orientation Dependence of Dynamic Recrystallization Behavior of Al Single Crystals

2004 ◽  
Vol 449-452 ◽  
pp. 31-36
Author(s):  
Yasuhiro Miura ◽  
Kentaro Ihara
Keyword(s):  
Dynamic Recrystallization ◽  
Single Crystals ◽  
Orientation Dependence ◽  
Crystallographic Analysis ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Stress Strain ◽  
Strain Behavior ◽  
The Matrix ◽  
Dynamic Recrystallization Behavior

An experimental study on the microstructure development and stress–strain behavior during high temperature deformation of aluminum (Al) single crystals was made by using X-ray Laue technique and the electron backscatter pattern (EBSP) technique. The main purpose was to clarify the process of dynamic recrystallization (DRX). The measured stress-strain curves with large stress peaks and the new Laue spots without streaks at around the stress peaks confirmed the occurrence of DRX in Al single crystals with initial compression axis <111>, <011> or <001>. Crystallographic analysis by the Laue technique and EBSP technique show that the DRX grain and the matrix have an <121> axis in common in the <111> crystal, an <101> axsis in the <011> and <001> crystals. For the <111> crystal, the unrecrystallized region near the DRX grain consists of subgrains adjoined each other with <112> tilt boundaries and the size of subgrains becomes smaller and the misfit at subgrain boundaries becomes larger as the DRX grain boundaries are approached. These results suggest that DRX grains are nucleated through the development of subgrains.

Reorientation of body-centered cubic single crystals in cold rolling

2010 ◽  
Vol 40 (3) ◽  
pp. 219-224 ◽  
Author(s):  
G. M. Rusakov ◽  
M. L. Lobanov ◽  
A. A. Redikul’tsev ◽  
I. V. Kagan
Keyword(s):  
Cold Rolling ◽  
Single Crystals ◽  
Body Centered Cubic

In-situ investigation of dislocation tangle–untangle processes in small-sized body-centered cubic Nb single crystals

2017 ◽  
Vol 198 ◽  
pp. 16-18 ◽  
Author(s):  
Xinyu Shu ◽  
Yan Lu ◽  
Tianjiao Xin ◽  
Zhipeng Li ◽  
Yanhui Chen ◽  
...  
Keyword(s):  
Single Crystals ◽  
Body Centered Cubic ◽  
In Situ Investigation ◽  
Dislocation Tangle

Plastic Behavior and Deformation Structure of Silicide Single Crystals with Transition Metals at High Temperatures

1993 ◽  
Vol 322 ◽  
Author(s):  
Y. Umakoshi ◽  
T. Nakashima ◽  
T. Nakano ◽  
E. Yanagisawa
Keyword(s):  
Brittle Fracture ◽  
Slip System ◽  
Single Crystals ◽  
Low Temperatures ◽  
Plastic Behavior ◽  
Deformation Structure ◽  
Secondary Slip ◽  
Ambient Temperatures ◽  
Brittle Transition ◽  
Increasing Temperature

AbstractThe mechanical and plastic behaviors of refractory silicide single crystals with Cllb (MoSi2), C40 (CrSi2, TaSi2 and NbSi2), D88 (Ti5Si3) and Cl (CoSi2 and (Co0.9Ni0.1)Si2) structures were investigated. The C40–type silicides were deformed by (0001)<1120> slip. Their yield stress decreased sharply with increasing temperature but NbSi2 and TaSi2 which were deformable even at low temperatures, exhibited anomalous strengthening around 1350°C. Deformation of Ti5Si3 whose ductile-brittle transition occurred around 1300°C was controlled by twins and the brittle fracture occurred on the basal plane. In CoSi2 the {001}<100> slip was only activated at ambient temperatures but addition of Ni activated {110}<110> slip as secondary slip system and improved the ductility. The creep behavior of MoSi2 and CrSi2 single crystals were also investigated and was found to be controlled by the viscous and glide motion of dislocations.

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