Estimation of Temperature Conductivity Coefficient Impact upon Fatigue Damage of Material

V. Bibik, A. Galeeva

Research output: Contribution to journalArticle

Abstract

In the paper we consider the peculiarities of adhesive wear of cutting tools. Simulation of heat flows in the cutting zone showed that, as thermal conduction and heat conductivity of tool material grow, the heat flows from the front and back surfaces to tool holder will increase and so, the temperature of the contact areas of the tool will lower. When estimating the adhesive wear rate of cemented-carbide tool under the cutting rates corresponding to the cutting temperature of up to 900 °C, it is necessary to take the fatigue character of adhesive wear into consideration. The process of accumulation and development of fatigue damage is associated with micro- and macroplastic flowing of material, which is determined by the processes of initiation, motion, generation, and elimination of line defects - dislocations. Density of dislocations grows with increase of the loading cycles amount and increase of load amplitude. Growth of dislocations density leads to loosening of material, formation of micro- and macrocracks. The heat capacity of material grows as the loosening continues. In the given paper the authors prove theoretically that temperature conductivity coefficient which is associated with heat capacity of material, decreases as fatigue wear grows.

Original languageEnglish
Article number012033
JournalIOP Conference Series: Materials Science and Engineering
Volume91
Issue number1
DOIs
Publication statusPublished - 14 Sep 2015

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Fatigue damage
Wear of materials
Adhesives
Specific heat
Temperature
Fatigue of materials
Heat transfer
Carbide tools
Microcracks
Cutting tools
Thermal conductivity
Defects

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

Cite this

Estimation of Temperature Conductivity Coefficient Impact upon Fatigue Damage of Material. / Bibik, V.; Galeeva, A.

In: IOP Conference Series: Materials Science and Engineering, Vol. 91, No. 1, 012033, 14.09.2015.

Research output: Contribution to journalArticle

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