| 1. |
- Porter, D.A., et al.
(author)
-
Dynamic studies of the deformation and fracture of pearlite using 200 kV SEM
- 1978
-
In: Electron microscopy 1978. - Toronto : Microsopical Soc. of Canada. - 0920622062 ; , s. 578-579
-
Conference paper (peer-reviewed)abstract
- Summary form only given, as follows. The influence of interlamellar spacing on the mechanics of deformation was studied and the materials examined ranged from coarse pearlite, with a mean interlamellar spacing λ~0.4 μm, to fine pearlite with λ~0.1 μm. The problems of ex post facto reasoning regarding the modes of deformation were avoided by continuously following deformation with the TV monitor and recording high resolution slow scan micrographs from the same area both before and after straining. The results of this investigation have shown that there are large differences in the deformation and fracture mechanisms between coarse and fine pearlites, especially when the cementite lamellae are aligned close to the tensile axis
|
|
| 2. |
- Porter, D.A., et al.
(author)
-
Dynamic studies of the tensile deformation and fracture of pearlite
- 1978
-
In: Acta Metallurgica. - : Elsevier BV. - 0001-6160. ; 26:9, s. 1405-1422
-
Journal article (peer-reviewed)abstract
- High resolution 200 kV scanning electron microscopy has been used to study in situ the tensile deformation and fracture of a range of pearlites, from relatively coarse mean interlamellar spacing of about 400 nm, to very fine mean spacing of about 90 nm. It was found that there were considerable differences in the tensile deformation behaviour between fine and coarse pearlites. A model is proposed to account for the differences based upon a combination of pile-up and fibre loading stresses, in which the operating deformation mode is largely determined by which type of mechanism is dominant
|
|
| 3. |
- Porter, D.A., et al.
(author)
-
The mechanism of deformation of pearlite
- 1979
-
In: Mechanisms of deformation and fracture. - Oxford : Pergamon Press. - 0080242588 ; , s. 87-96
-
Conference paper (peer-reviewed)
|
|
| 4. |
- Jankowska, Elzbieta, et al.
(author)
-
Antidromic Activation of Renshaw Cells and their Axonal Projections
- 1973
-
In: Acta Physiologica Scandinavica. - : Wiley. - 0001-6772 .- 1365-201X. ; 88, s. 198-214
-
Journal article (peer-reviewed)abstract
- Antidromic invasion of Renshaw cells following stimulation of their axons was found always to produce only a single spike in contrast to repetitive synaptic discharges. A systematic exploration of the spinal cord in a search for sites from which single Renshaw cells could be activated antidromically revealed that their axons: 1) can project to distances over 12 mm, 2) run in the ventral funiculus. 3) are likely to terminate both within motor nuclei (mainly at short distances) and in an area dorso‐medial and medial to them, and 4) have a maximal conduction velocity of about 30 mls. © 1973 Scandinavian Physiological Society
|
|
