材料期刊网

Possible Phenomena of Stochastic Behaviour of Shear Deformed Aluminum

S.V.Alekseev S.G , Psakhie V.E.Panin Institute of Strength Physics and Materials Science of the Russian Academy of Sciences , Siberian Branch.Tomsk , 634055 , Russia

材料科学技术（英文）

The influence of shear deformation on the behaviour of Mg and Zn impurities as well as self-interstitial atoms in Al was studied using molecular dynamics method.The profilies of potential relief were calculated in directions of possible migration of interstitials.It was found that under load- ing the location of interstitial atoms may be undefined.It means that the system of determined parti- cles may go into stochastic regime of behaviour.

关键词: stochastic behaviour , null , null

Russia's Precious Metals Market: Condition and Prospects

KOTLYAR A. Yu.

贵金属

关键词:

The Work of NAHE on Promotion of Achievements in Hydrogen Energy in Russia and of Advantages of Using Platinoids in the Energy Sector

SHELISCH P. B. , RAMENSKY A. Yu. , BEKLEMISCHEVA O. A. , RAMENSKAYA E. A.

贵金属

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DEVELOPMENT OF EFFECTIVE TECHNOLOGICAL PROCESSES OF HIGH-STRENGTH STEEL WELDING

L.I.Mikhoduj (The E. O. Paton Electric Welding Institute , NAS of Ukraine , Kiev , Ukraine)

金属学报(英文版)

Composition and service properties of high - strength low-alloyed steels with 590-980 MPa yield strength,which find an application in Russia, Belorus,Ukraine and other countries of the former USSR in manufacture of welded structures of a powerful mining and transport machinery, are given. Electrodes and wires for main processes of arc welding of these steels have been devel- oped on the basis of a rational use of different systems of alloying (08KhN2GM,08KhNG2M, and also economical systems of type 10G25, ect. ). Main approaches to the technological provess- es of manufacture of structures of high - strength steels are formulated.They are mainly directed to the weakening of de offect of the factors which contribute to a delayed fracture of joints (diffusive hydrogen,unfavourable rates of cooling,level of residual stresses). When there are no stress concentrators (and at a low level of residual stresses) the welded joints of these steels have a good resistance to fatigue and brittle fractures.As a rule, they are prevented with the help of the known approaches.It is shown that in addition to them and due to a proper selection of conditions of welding the life of welded joints of the high - strength steels can be 1. 2 - 1. 4 times in- creased.

关键词: high-strength steel , null , null , null