Some extracts from COMPENDEX:

 Title:Laser beam hardening of carbon and low alloyed steels: discussion of
increased quantity of retained austenite
  Author(s): Fedosov, S.A.
  Author Affiliation: Samara State Technical Univ (SSTU)
  Source: Journal of Materials Science v34 n17 1999 Kluwer Academic Publishers
Dordrecht Netherlands p 4259-4264 0022-2461 JMTSAS
  Abstract: It was shown that mainly three effects are responsible for the
increased quantity of retained austenite in carbon and low alloyed steels
after laser transformation hardening. At low peak temperatures a high
dislocation density appears in the initial austenite phase during the
reversed polymorphic transformation which is preserved till the martensite
transformation begins and retards this reaction. At high peak temperatures
this is more complete carbides dissolution than after standard furnace
hardening. Both effects are overlapped by a third one. This is the carbon
up-hill diffusion resulting in surface enrichment of carbon and a decrease of
the martensite start temperature. English (Author abstract)  39 Refs.
  Subjects: Steel Hardening; Laser beam effects; Austenite; Martensitic
transformations; Dislocations (crystals); Austenitic transformations;
Temperature; Dissolution; Diffusion; Cooling;
  Classification Codes: 545.3; 537.1; 744.8; 531.1; 531.2; 933.1.1
  Document Type: JA
  Identifiers: Laser beam hardening; Carbon up-hill diffusion; Polymorphic
transformation

Compendex 1996

  DIALOG No: 04315147  EI Monthly No: EIP96012987542
  Title: The analysis of causes for gamma -phase quantity increasing under
laser irradiation of quenched high-carbon and low-alloyed steels
  Author: Fedosov, S.A.
  Corporate Source: Samarskij Gosudarstvennyj Tekhnicheskij Univ, Samara,
Russia
  Source: Fizika i Khimiya Obrabotki Materialov n 3 May-June 1995. p 40-48
  Publication Year: 1995
  CODEN: FKOMAT
  Language: Russian
  Document Type: JA; (Journal Article)  Treatment Code: A; (Applications); X;
(Experimental)
  Abstract: It was shown that mainly three cause are responsible for that
effect in U12, 45 and ShKh15 steels.  At low heating temperatures this is high
dislocation density appeared in initial austenite phase during the reversed
polymorphic transformation which is preserved till martensitic reaction
beginning and retards this reaction.  At high temperatures this is more
complete carbides dissolution than after conventional furnace quenching.  On
two both causes the effect of third mechanism overlaps.  This is the appearanc
of carbon upgoing diffusion resulting in steel surface enrichment with carbon
and martensitic point decreasing.  32 Refs.
  Descriptors: *Metals; Carbon steel; Radiation effects; Laser beam effects;
Phase composition; Temperature control; Crystal defects; Carbon; Diffusion;
Phase transitions
  Identifiers: Polymorphism
  EI Classification Codes:
  622.2  (Radiation Effects)
  531  (Metallurgy & Metallography); 622  (Radioactive Materials)

Compendex 1993

  DIALOG No: 03540441  EI Monthly No: EI9301000637
  Title: X-ray diffraction analysis of the substructure of retained austenite
after laser treatment structural steels.
  Author: Fedosov, S. A.
  Source: Physics and Chemistry of Materials Treatment (English translation of
Fizika i Khimiya Obrabotki Materialov) v 26 n 1
Jan-Feb 1992 p 98-102
  Publication Year: 1992
  CODEN: PCMTEU  ISSN: 0264-729X
  Language: English
  Document Type: JA; (Journal Article)  Treatment Code: X;
(Experimental)
  Abstract: X-ray diffraction analysis was carried out to examine the
substructure of retained austenite in structural steels after furnace quenching
and laser treatment under different conditions.  The results show that the
parameters of the substructure of retained austenite depend on its content in
the steel and are clearly independent of the type of heat treatment (furnace or
laser) and chemical composition of the steel, and depend on them only through
the effect of the latter on the amount of the retained austenite. (Author
abstract) 10 Refs.
  Descriptors: *AUSTENITE; STEEL; HEAT TREATMENT; X RAY ANALYSIS;
MICROSTRUCTURE; LASER APPLICATIONS
  Identifiers: SUBSTRUCTURE; LASER TREATMENT; STRUCTURAL STEEL
  EI Classification Codes:
  545 (Iron & Steel); 744 (Lasers); 537 (Heat Treatment); 801 (Chemical
Analysis & Physical Chemistry)

  DIALOG No: 03630535  EI Monthly No: EIP93050802249
  Title: Quasistationary roughness in case of pulse laser treatment of steels.
  Author: Fedosov, S.A.
  Corporate Source: Politekhnicheskij Inst, Samara, Russia
  Source: Trenie i Iznos v 13 n 2 Feb 1992. p 356-362
  Publication Year: 1992
  CODEN: TRIZD6  ISSN: 0202-4977
  Language: Russian
  Document Type: JA; (Journal Article)  Treatment Code: A; (Applications); T;
(Theoretical); X; (Experimental)
  Abstract: Change of roughness in surfaces of ShKh15 (1.0%C-1.5%Cr-Fe), 12Kh1
(1.2%C-1%Cr), R18 (0.8%C-18%W-4.%Cr-1%V-Fe) steels under the effect of pulsed
laser treatment was studied. Quasistationary roughness to which roughness of
samples following several pulses was approaching was observed in case of pulsed
laser treatment. Surface roughness could be reduced to Ra equals 0.2 mkm by
pulsed laser treatment.  Treatment regime of 3 pulses per each spot was shown
to be optimum from this point of view. Possible mechanisms resulting in
formation of quasistationary roughness and thus leading to stationary one were
discussed. 8 Refs.
  Descriptors: *Friction; Roughness measurement; Surfaces; Steel; Laser beam
effects; Surface properties; Laser pulses; Wear of materials; Surface testing
  Identifiers: Quasistationary roughness
  EI Classification Codes: 931.2 (Physical Properties of Gases, Liquids &
Solids); 901.3 (Engineering Research); 744.9 (Laser Applications) 931 (Applied
Physics); 901 (Engineering Profession); 744 (Lasers)

  Title: DETERMINATION OF THE QUALITY OF A WELD SPOT BY ITS VISUAL APPEARANCE DURING
LASER SPOT WELDING WITH DEEP PENETRATION
  Author: Fedosov, S.A.;
  Author Affiliation:
  Source: Svarochnoe Proizvodstvo n 6 Jun 1992 p 16
  ISSN: 0491-6441 CODEN: SVAPAI
  No Abstract

Compendex 1992

  DIALOG No: 03482956  EI Monthly No: EI9209119969
  Title: Stability of residual austenite after laser treatment of steels.
  Author: Fedosov, S. A.
  Source: Fizika i Khimiya Obrabotki Materialov n 3 May-Jun 1991 p 141-142
  Publication Year: 1991
  CODEN: 500047
  Language: Russian
  Document Type: JA; (Journal Article)  Treatment Code: X; (Experimental); A;
(Applications)
  Abstract: Large amount of residual austenite is fixed in carbon steels after
laser treatment.  Temperature stability of residual austenite after pulsed
laser irradiation of carbon steel and ShKh15 type steel was studied.  It is
shown that after laser treatment residual austenite is characterized by the
same temperature stability like after usual quenching.  Temperature stability
of residual austenite in both steels does not depend on carbon content and the
initial level of residual austenite.  Data on residual austenite decomposition
in ShKh15 steel after laser treatment and 3 year holding at room temperature
show its level reduction from 40-42 to 35-37 %. 1 Ref.  In Russian.
  Descriptors: *STEEL HEAT TREATMENT--*Laser Applications; IRON AND STEEL
METALLOGRAPHY--Austenite; CARBON--Concentration; THERMAL EFFECTS--Stability;
CARBON STEEL
  Identifiers: RESIDUAL AUSTENITE STABILITY
  EI Classification Codes: 537  (Heat Treatment); 545  (Iron & Steel); 531
(Metallurgy & Metallography); 804  (Chemical Products)

  DIALOG No: 03069945  EI Monthly No: EI9106074060
  Title: Effect of laser treatment on the retained austenite content of carbon
and chromium steels.
  Author: Fedosov, S. A.
  Source: Physics and Chemistry of Materials Treatment (English translation of
Fizika i Khimiya Obrabotki Materialov) v 24 n 5 Sep-Oct 1990 p 441-444
  Publication Year: 1990
  CODEN: PCMTEU  ISSN: 0264-729X
  Language: English
  Document Type: JA; (Journal Article)  Treatment Code: X; (Experimental)
  Abstract: Investigations were carried out into the effect of the
concentration of carbon and chromium and the laser treatment conditions and th
amount of retained austenite in steels.  Laser treatment was carried out using
pulsed time in the millisecond range in three conditions: with melting without,
melting and with heating to the temperatures in the single-phase region
(complete quenching), and with heating to the temperatures of the two-phase
range (partial quenching).  (Author abstract)
  Descriptors: *STEEL HEAT TREATMENT--*Laser Applications; CARBON STEEL--Heat
Treatment; IRON AND STEEL METALLOGRAPHY--Austenite
  Identifiers: LASER TREATMENT EFFECT; RETAINED AUSTENITE CONTENT; CHROMIUM
STEELS
  EI Classification Codes: 545  (Iron & Steel); 744  (Lasers); 537  (Heat
Treatment)