INVESTIGATION OF FATIGUE STRENGTH OF MACHINE COMPONENTSWITH THERMAL SPRAY COATINGS UNDER CYCLIC PUSH/PULL CONDITIONS

Authors

  • A. A. Rakitsky Belarusian National Technical University, Ministry of Education of the Republic of Belarus, 65, Nezavisimosty ave., 220013 Minsk, the Republic of Belarus Автор

Keywords:

thermal spray powder coating; fatigue resistance; crack growth speed; fatigue endurance; brittle-type cracking

Abstract

A substantiation of a surface-strengthening technology of machine components for structures endurance increase was implemented.
The influence of a thermal spray powder Ni-Cr-base coating on a medium carbon steel fatigue resistance was investigated. Fully
reversed push/pull tests of mild hour-glass profile specimens were carried out which showed an irregular increasing of a durability under
chosen loading parameters and strengthening technology. A low cycle fatigue field under close to the yield limit stresses was studied and
discussed in detail where a growth of number cycles to failure for a combined specimen runs up to a value divisible by five. It is proved
that a steel specimen with a hard coating works as the indivisible whole and in spite of a brittle-type cracking its fatigue endurance
increases essentially.

Fig. 5. Ref.: 4 titles.

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Published

2016-06-01

Issue

Выпуск 4. Июнь 2016 года

Section

МАШИНОСТРОЕНИЕ И МАШИНОВЕДЕНИЕ

License

Copyright (c) 2023 Вестник БарГУ Серия "Технические науки"

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