Mechanisms of energy dissipation during displacement- sensitive indentation in Ge single crystals at elevated temperatures

B. Ya. Farber Rosemount Analytical Inc., Gas Division, Orrville, Ohio, 44667, USA; Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio, 44106, USA

V. I. Orlov Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio, 44106, USA; Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow District, Russia

V. I. Nikitenko Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow District, Russia

A. H. Heuer Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio, 44106, USA

Abstract

Load-displacement indentation tests have been performed in Ge single crystals on a newly designed displacement-sensitive hardness tester in the temperature range 20–450°C. The deformation substructure in the vicinity of the indentation impressions was investigated using selective etching. The energy dissipated during the loading-unloading indentation cycle has been measured and compared with the extent and the structure of the deformation zone. Mechanisms of plastic flow and fracture during indentation are discussed.

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Mechanisms of energy dissipation during displacement- sensitive indentation in Ge single crystals at elevated temperatures

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Mechanisms of energy dissipation during displacement- sensitive indentation in Ge single crystals at elevated temperatures

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