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Plasticity ofMaterials Determinedby the IndentationMethod Yu.V. MilmanS. І. ChugunovaІ. V. Goncharova2018 год

Plasticity of Materials Determined by the Indentation Method
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Аннотация: Plasticity of Materials DeterMineD by the inDentation MethoDIn this review, the development of techniques for determining the plasticity of mate rials by the indentation is considered.the development of methods for deter mining the plasticity of materials by the indentation is based on the use of funda mental ideas of the physics of strength and plasticity.Significant development of these me thods became possible after the introduction of a new plasticity characteristic δ * = ε p /ε t , where ε р is the plastic deformation, and ε t is the total deformation.this plasticity characteristic corresponds to the modern physical definitions of plasticity, in contrast to the widely used elongation to failure δ. the new plasticity characteristic is easily determined by standard determination of hardness by the diamond pyramidal indenters at constant load P (designated as δ Н ) and by instrumental nanoindentation (designated as δ А , and δ H ≈ δ A ).A significant advantage of the new plasticity charac teristic is the ability to determine it not only for metals, but for materials, which are brittle at the standard mechanical tests (ceramics, thin layers, coa tings, etc.), as well.In the development of ideas about theoretical strength, concepts of theoretical plasticity under the dislocationfree and dislocation deformation mechanisms are introduced.A number of studies have established a correlation of δ Н with the elec tronic structure of the material and its physical properties.As shown, the tabor parameter С (C = HM/σ S , where HM is the Meyer hardness, and σ S is the yield stress) is easily calculated by the δ Н value.therefore, indentation allows currently determining simply not only the hardness, but also the plasticity and yielding stress of materials.thus, indentation became a simple method for determination of the complex of mechanical properties of materials in a wide temperature range using a sample in the form of a metallographic specimen.
Год издания: 2018
Авторы: Yu.V. Milman, S. І. Chugunova, І. V. Goncharova, А. А. Golubenko
Источник: Progress in Physics of Metals
Ключевые слова: Metal and Thin Film Mechanics, Advanced materials and composites, Diamond and Carbon-based Materials Research
Другие ссылки: Progress in Physics of Metals (PDF)
Progress in Physics of Metals (HTML)
DOAJ (DOAJ: Directory of Open Access Journals) (HTML)
The scientific electronic library of periodicals of the National Academy of Sciences of Ukraine (National Academy of Sciences of Ukraine) (PDF)
The scientific electronic library of periodicals of the National Academy of Sciences of Ukraine (National Academy of Sciences of Ukraine) (HTML)