Question

Problem 7.73 (a) Calculate the knoop hardness when a 478-g load yields an indentation diagonal length of 86.3 pm. (b) The measured HK of some material is 184. Compute the applied load if the indentation diagonal length is 0.24 mm. Click if you would like to Show Work for this question: Open Show Work

Answer 1

NDAY 18 19 20 21 22 23 24 25 26 27 28 Sol Mars of load = 478. golwolon @ diagonal Longth - 863 um. Now the knoop hardness is given by HK = 1412 P x to cnoto e non P load in ke I diagnol length in mm. HI = (14,2 x 478 X 1 Jeg 0.186.3 x 10-6x103 mm) 2 6. 78 76 kg - ورو6.ہاہا اہم م 6-7876 7.447 X 10 3 0.91145 X103 Knoop Hardness LAR= 911.45 HI 6 measured hr = 184 - l = 0.24 mm. НА 5 19. Эх Р 184 = 14.2 x P p= 0.746 kg = 7468 2018 A