Desenvolvimento de um protótipo para análise dinâmica da dureza de superfícies metálicas
In this paper we developed a prototype for dynamic and quantitative analysis of the hardness of metal surfaces by penetration tests. It consists of a micro-indenter which is driven by a gear system driven by three-rectified. The sample to be tested is placed on a table that contains a load cell t...
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| Materialtyp: | Dissertação |
| Språk: | por |
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Universidade Federal do Rio Grande do Norte
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| Länkar: | https://repositorio.ufrn.br/jspui/handle/123456789/12723 |
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| Sammanfattning: | In this paper we developed a prototype for dynamic and quantitative analysis of the
hardness of metal surfaces by penetration tests. It consists of a micro-indenter which
is driven by a gear system driven by three-rectified. The sample to be tested is
placed on a table that contains a load cell that measures the deformation in the
sample during the penetration of micro-indenter. With this prototype it is possible to
measure the elastic deformation of the material obtained by calculating the depth of
penetration in the sample from the difference of turns between the start of load
application to the application of the load test and return the indenter until the
complete termination of load application. To determine the hardness was used to
measure the depth of plastic deformation. We used 7 types of steel trade to test the
apparatus. There was a dispersion of less than 10% for five measurements made on
each sample and a good agreement with the values of firmness provided by the
manufacturers. |
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