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Si suggerisce un metodo analitico e/o grafico di trattamento dei valori di microdurezza Vickers misurati con diversi carichi su di uno stesso materiale. Nell’ipotesi che le variazioni di microdurezza in funzione del carico siano dovute ad un ritiro elastico dell'impronta, il metodo suggerito consente la valutazione di un valore di microdurezza estrapolata indipendente dal carico. Tale valore rappresenta una buona approssimazione della macrodurezza.
Knoop and Vickers micro-indentation hardness numbers, measured on 11 specimens with seven different loads between 15 and 500 grams, are reported. Details on the instrumental conditions are given.
The analysis of Knoop and Vickers micro-indentation numbers, measured on 11 specimens with seven different loads between 15 and 500 grams, shows that micro-hardness variation with load is related only to elastic recovery effects. Use of extrapolated Vickers and Knoop values (HVE and HKE), which allow direct comparison of the results given by the two indenters, is suggested.
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