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Effect of Pile-Up on the Mechanical Characteristics of Steel with Different Strain History by Depth Sensing Indentation

Result description

Depth sensing indentation allows deriving mechanical properties from the indentation loaddisplacement data using a micromechanical model developed by Oliver & Pharr (O&P). However, O&P analysis on the indentation unloading curve is developed from a purely elastic contact mechanics (sink-in). The applicability of O&P analysis is limited by the materials pile-up. However, when it does, the contact area is larger than that predicted by elastic contact theory (material sinks-in during purely elastic contact), and both hardness, H, and Young?s modulus, E, are overestimated, because their evaluation depends on the contact area deduced from the load-displacement data. H may be thus overestimated by up to 60 % and E by up to 30 % depending on the extent of pile-up 1,2. It is therefore important to determine the effect of pile-up on obtained mechanical characteristics of the material by depth sensing indentation.The work experimentally analyses the effect of pile-up on the mechanical characteri

Keywords

Berkovich diamond indenterpile-uphardnessYoung?s modulusthin steel sheets

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    Effect of Pile-Up on the Mechanical Characteristics of Steel with Different Strain History by Depth Sensing Indentation

  • Original language description

    Depth sensing indentation allows deriving mechanical properties from the indentation loaddisplacement data using a micromechanical model developed by Oliver & Pharr (O&P). However, O&P analysis on the indentation unloading curve is developed from a purely elastic contact mechanics (sink-in). The applicability of O&P analysis is limited by the materials pile-up. However, when it does, the contact area is larger than that predicted by elastic contact theory (material sinks-in during purely elastic contact), and both hardness, H, and Young?s modulus, E, are overestimated, because their evaluation depends on the contact area deduced from the load-displacement data. H may be thus overestimated by up to 60 % and E by up to 30 % depending on the extent of pile-up 1,2. It is therefore important to determine the effect of pile-up on obtained mechanical characteristics of the material by depth sensing indentation.The work experimentally analyses the effect of pile-up on the mechanical characteri

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    JG - Metallurgy, metal materials

  • OECD FORD branch

Result continuities

Others

  • Publication year

    2014

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    22nd International Conference on Metallurgy and Materials: Conference Proceedings

  • ISBN

    978-80-87294-54-3

  • ISSN

  • e-ISSN

  • Number of pages

    5

  • Pages from-to

    629-633

  • Publisher name

    OstravaTanger, .s.r.o.

  • Place of publication

    Ostrava

  • Event location

    Brno

  • Event date

    May 21, 2014

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article