Question 3 (a) According to Vickers hardness data set in Table 3, which material is the most hard compared with others?

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Question 3 A According To Vickers Hardness Data Set In Table 3 Which Material Is The Most Hard Compared With Others 1 (75.26 KiB) Viewed 19 times

Question 3 (a) According to Vickers hardness data set in Table 3, which material is the most hard compared with others? (assuming that the tip angle (0) of diamond pyramid is 136°C, and indent force (F) is 500gf. (12 marks) Material Material A Material B Material C Material D Material E d: dz D = (di + d₂ )/2 Table 3. Vickers Hardness testing results di (µm) d₂ (um) 42.3 43.6 45.8 44.3 46.5 40.0 41.4 44.3 42.1 39.5 Hy (b) What do Fresnel equations signify? (c) Name the methods to conduct crack length measurements in R-curve tests. (5 marks) (8 marks)