Structural changes in unstable austenitic steels during abrasive wear

1971 ◽  
Vol 13 (9) ◽  
pp. 762-763
Author(s):  
V. S. Popov ◽  
N. N. Brykov
Keyword(s):  
Abrasive Wear ◽  
Structural Changes ◽  
Austenitic Steels

Fatigue and Structural Changes of High Interstitial Stainless Austenitic Steels

2010 ◽  
Vol 81 (4) ◽  
pp. 299-307 ◽  
Author(s):  
H. Berns ◽  
V.G. Gavriljuk ◽  
N. Nabiran ◽  
Yu.N. Petrov ◽  
S. Riedner ◽  
...  
Keyword(s):  
Structural Changes ◽  
Austenitic Steels

Running-in period for the abrasive wear of austenitic steels

Wear ◽  
2020 ◽  
Vol 452-453 ◽  
pp. 203298
Author(s):  
O.A. Zambrano ◽  
E.C. Muñoz ◽  
S.A. Rodríguez ◽  
J.J. Coronado
Keyword(s):  
Abrasive Wear ◽  
Austenitic Steels

The Effect of Heat Treatment on the Microstructure and Mechanical Properties of Multilayered Composites Welded by Explosion

2012 ◽  
Vol 535-537 ◽  
pp. 231-234 ◽  
Author(s):  
Elena A. Prikhodko ◽  
Ivan A. Bataev ◽  
Anatoliy A. Bataev ◽  
Vasily S. Lozhkin ◽  
Vjacheslav I. Mali ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Explosive Welding ◽  
Structural Changes ◽  
Austenitic Steels ◽  
Chemical Compositions ◽  
Thin Sheets ◽  
Complicated Structure ◽  
Multilayered Composites ◽  
Quenching And Tempering

The structure of composites formed by explosive welding of thin sheets of tool and austenitic steels was studied by structural analysis methods. It is shown that the quenching and tempering of composites leads to the formation of complicated structure containing, along with layers of dissimilar steels, layers with new chemical compositions. Due to the structural changes there is an 2-fold increasing of impact toughness.

Effect of normal load on abrasive wear resistance and wear micromechanisms in FeMnAlC alloy and other austenitic steels

Wear ◽  
2016 ◽  
Vol 348-349 ◽  
pp. 61-68 ◽  
Author(s):  
O.A. Zambrano ◽  
Yesid Aguilar ◽  
Jairo Valdés ◽  
S.A. Rodríguez ◽  
J.J. Coronado
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Normal Load ◽  
Abrasive Wear Resistance ◽  
Austenitic Steels

Dilatometric analysis of structural changes in welding ferritic-austenitic steels

1991 ◽  
Vol 5 (10) ◽  
pp. 812-813
Author(s):  
L A Efimenko ◽  
O A Pushkina ◽  
M A Kharitonova
Keyword(s):  
Structural Changes ◽  
Austenitic Steels ◽  
Dilatometric Analysis

Fine Structural Changes in the Microvasculature of the Mouse Pinna: Aging and Radiation Injury

1974 ◽  
Vol 32 ◽  
pp. 54-55
Author(s):  
S. Phyllis Steamer ◽  
Rosemarie L. Devine
Keyword(s):  
Structural Changes ◽  
Radiation Treatment ◽  
Arterial Stenosis ◽  
Ultrastructural Changes ◽  
Vascular Effects ◽  
Microvascular Changes ◽  
Surrounding Connective Tissue ◽  
Fission Neutrons ◽  
Total Body

The importance of radiation damage to the skin and its vasculature was recognized by the early radiologists. In more recent studies, vascular effects were shown to involve the endothelium as well as the surrounding connective tissue. Microvascular changes in the mouse pinna were studied in vivo and recorded photographically over a period of 12-18 months. Radiation treatment at 110 days of age was total body exposure to either 240 rad fission neutrons or 855 rad 60Co gamma rays. After in vivo observations in control and irradiated mice, animals were sacrificed for examination of changes in vascular fine structure. Vessels were selected from regions of specific interest that had been identified on photomicrographs. Prominent ultrastructural changes can be attributed to aging as well as to radiation treatment. Of principal concern were determinations of ultrastructural changes associated with venous dilatations, segmental arterial stenosis and tortuosities of both veins and arteries, effects that had been identified on the basis of light microscopic observations. Tortuosities and irregularly dilated vein segments were related to both aging and radiation changes but arterial stenosis was observed only in irradiated animals.

Evaluation of single-electron movies of glutamine synthetase molecules

1983 ◽  
Vol 41 ◽  
pp. 280-281
Author(s):  
W. Kunath ◽  
E. Zeitler ◽  
M. Kessel
Keyword(s):  
Electron Microscope ◽  
Glutamine Synthetase ◽  
Electron Irradiation ◽  
Structural Damage ◽  
Structural Changes ◽  
Single Electron ◽  
Continuous Series ◽  
Digital Recording ◽  
Recording Device ◽  
Low Exposure

The features of digital recording of a continuous series (movie) of singleelectron TV frames are reported. The technique is used to investigate structural changes in negatively stained glutamine synthetase molecules (GS) during electron irradiation and, as an ultimate goal, to look for the molecules' “undamaged” structure, say, after a 1 e/Å2 dose.The TV frame of fig. la shows an image of 5 glutamine synthetase molecules exposed to 1/150 e/Å2. Every single electron is recorded as a unit signal in a 256 ×256 field. The extremely low exposure of a single TV frame as dictated by the single-electron recording device including the electron microscope requires accumulation of 150 TV frames into one frame (fig. lb) thus achieving a reasonable compromise between the conflicting aspects of exposure time per frame of 3 sec. vs. object drift of less than 1 Å, and exposure per frame of 1 e/Å2 vs. rate of structural damage.

Fine Structural Changes in the Adenohypophyses of Rats Following Destruction of the Pituitary Stalk

1977 ◽  
Vol 35 ◽  
pp. 496-497
Author(s):  
K. Kovacs ◽  
E. Horvath ◽  
J. M. Bilbao ◽  
F. A. Laszlo ◽  
I. Domokos
Keyword(s):  
Structural Changes ◽  
Tissue Injury ◽  
Anterior Lobe ◽  
Uranyl Acetate ◽  
Male Rats ◽  
Pituitary Stalk ◽  
Sequence Of Events ◽  
Pituitary Glands ◽  
Electrolytic Lesions ◽  
Ultrathin Sections

Electrolytic lesions of the pituitary stalk in rats interrupt adenohypophysial blood flow and result in massive infarction of the anterior lobe. In order to obtain a deeper insight into the morphogenesis of tissue injury and to reveal the sequence of events, a fine structural investigation was undertaken on adenohypophyses of rats at various intervals following destruction of the pituitary stalk.The pituitary stalk was destroyed electrolytically, with a Horsley-Clarke apparatus on 27 male rats of the R-Amsterdam strain, weighing 180-200 g. Thirty minutes, 1,2,4,6 and 24 hours after surgery the animals were perfused with a glutaraldehyde-formalin solution. The skulls were then opened and the pituitary glands removed. The anterior lobes were fixed in glutaraldehyde-formalin solution, postfixed in osmium tetroxide and embedded in Durcupan. Ultrathin sections were stained with uranyl acetate and lead citrate and investigated with a Philips 300 electron microscope.

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