SCIENTIFIC ABSTRACT MOSHCHANSKIY, V. A. - MOSHCHINSKAYA, N. K.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001135320001-5
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: July 13, 2001
• Sequence Number: 1
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

TITLEs Experimental Test of the Influenci@ of Cryst..llite
Anisotropy on the Shape of the Detje Ring -Dtained
from a Strained Sample (Eksperimental'naya erka
vliyaniya ani8otropii kristallitov na formu
debayevskogo kolltou ot napryazhennogo obraztBa)
of a poljcryotallic substance at elastic deformations;
within the elastic limits, the strain field of a
polycrystal is non-homogoneous. The force field
suffers a break in continuity during tranaitiono from
one cryotallite to another, if their crystallogr.qhic
orientations are different. In virtue of this, changes
in Debye ring shape of strained samples are observed.
2. Complete agreement between theoretical calculations
and experiments was not observed, because the interaction
of adjacent crystallites had not been taken into account
in the theoretical calculations.
3. The smearing of lines disappears as soon as a sample
is released from strain, within the limits of elasticity.
A residual -mearing remains, if a sample was deformed
beyond its limit of elasticity.
4. The measurement of strains by the X-ray method
yields the most correct results only if the face and
Card 3/4 the azimuth of the Debye ring chosen are such as to

TITLE i Experimental Te-t of the Influence of Cryatallite
Anisotropy on the Shape of the Debye Ring obtained
from a Strained Sample (Eksperimental,naya proverka
vliyaniyu anisotropii kristallitov no formu
debayevskogo kol't3a ot napryazhennogo obrazt9a)
result in maximum line shift.
5 @. The aluaticity modulua determined by the X-ray
method differs from that determined by a mechanic!,l
metnod. The latter is isotropic, but the X-ray
elasticity modulus is anisotropic;
6, Beyond the limits of elasticity, a polycrystallic
body behaves as an isotropic subs@.ance
4 figiares and I table are given There are 4
reference.,3, all Slavic (Russian)
INSTiTUTION: Department of Metal Study in the Gor kiy Folytechnic
Institute im. Zhdanov
PRESENTED BY:
SUBMITTED: No date
AVAILABLE: At the Library of Congress
Card 4/4

SOV/126-7-6-7/24
AUTHORS: Aksenov, G. 1. and Moshchanskiy. V. A.
TITLE: Crystallite Anisotropy and Debye Ring Structure in a
Stressed Sample
PERIODICAL: Fizika metallov i metallovedeniye, 1959, Vol 7, Nr 6,
PP 847-854 (USSR)
ABSTRACT: In 1929 one of the authors (Aksenov) analysed theoretically
the reflection of monochromatic X-rays from atomic planes
in a linearly stressed polycrystal. It was found that
elastic deformation of the polycrystal should be
accompanied by displacement of the Debye lines in X-ray
diffraction patterns (Ref 1). In 1934 this theoretical
analysis was extended by allowing for the anisotropy of
the elastic properties of crystallites. It was then found
that the Debye lines should be both displaced and
broadened. The present paper is a continuation of the
work just described. The authors calculate theoretically
the conditions of refloction of monochromatic X-rays on
the (112) and (310) faces of iron and the (511) face of
aluminium, allowing for the anisotropy of the elastic
Card 1/4 properties of crystallites. This theoretical analysis
led to the following conclusions.

sov/1*26-7-6-7/24
CrystErIlite Anisotropy and Debye Ring Structure in a Stressed Sample
A) Extension of samples should be accompanied by the Debye
line displacement and instead of a circle for an unstressed
sample an ellipse should be obtained with semi-axes a< i),
The axis b should lie along the direction of extension.
B) The Debye line displacement for the same direction of
extension is different in the case of different faces. For
example, for the (511) face the displacement is greater
than for the (310) face and the (112) face lines are not
displaced at all.
C) The Debye line displacement increases with increase
applied stress.
D) Broadening of the Debye lines should occur on elastic
deformation and the degree of broadening may be greater or
smaller than their displacement.
E) The broadening should be different for different faces.
The authors use an ionic X-ray tube with a special
chamber to check experimentally their theoretical results.
The chamber contained a device for producing pure bending
of samples and a cassette which made it possible to record
Card 2/4 the whole Debye ring. Normalised 60S2 steel and duralumin

SOV/126-7-6-7/24
Crystallite Anisotropy and Debye Ring Structure in a Stressed Sample
were used aI samples. The elastic limit of steal was
40-45 kg/mm and that of duralumin was 20 kg/mm, . The
applied stresses were measured by means of resistance
strain gauges. For each face the following X-ray
patterns were recorded: one for the unstressed state,
three for different stresses within the elastic limit
(each of these was recorded twice), two outside the
elastic limit and one for the unloaded sample after it
had been tested. It was found that the Debye lines of
an elastically deformed sample fall on an ellipse with
semi-axes a