THE MODEL OF DEVELOPING FRETTING CORROSION IN THE SURFACE LAYER OF THE SPRING LEAF 

Artyomov Igor Iosifovich, Doctor of engineering sciences, professor, vice rector for research, Penza State
University, rectorat@pnzgu.ru
Krevchik Vladimir Dmitrievich, Doctor of physical and mathematical sciences, head of sub-department of physics, Penza State University, physics@pnzgu.ru
Menshova Svetlana Borisovna, Candidate of engineering sciences, associate professor, sub-department of natural-science and engineering disciplines, Kuznetsk Instritute of Information and Administrative Technologies (affiliated branch of Penza State University), pnz-transmash@yandex.ru
Kelasyev Vasily Vladimirovich, Assistant, sub-department of transport machinery, Penza State University, pnz-transmash@yandex.ru
Marinina Larisa Alexandrovna, Candidate of engineering sciences, associate professor, Affiliated branch of Penza State University in Serdobsk, sfpgu@sura.ru 

658.56 

The article suggests a theoretical approach to the fretting – corrosion description with respect to the leaf springs block. This approach is based on consideration of the dislocation creep process, which is stimulated by the contact temperature and normal stress in the range of abrasive action. It is shown, that the curves demonstrating dependence between the microcracks length and the period of the fretting – corrosion process development are characterized by a fracture, caused by the substitution of the mechanism of wedge-shaped cavity “growth” due to dislocation arrays, by the mechanism of microcracks growth. The substitution is caused by increase of cavity size and normal stress rate. 

fretting – corrosion, dislocation creep, abrasive action, dislocation arrays, wedge – shaped cavity, microcracks.