Please if its False write the correct answer Qualify each statement as \"True\"

Question

Please if its False write the correct answer

Qualify each statement as "True" or "False". Some sort of explanation for each is required. a. Fatigue testing is a type of static mechanical test method. True False b) Vickers hardness test is always used as a microhardness test technique. True False c) With increasing temperature, the thermal creep rate decreases. True False d) Due to the Hall-Petch strengthening effect, a coarse grained material can exhibit higher yield strength compared to a fine grained material. True False e) Uranium has six allotropic forms. True False f) Uranium has a melting point that surpasses the melting point of UO_2. True False g) Irradiation creep at lower homologous temperature is not possible. True False h) Void swelling is a direct result of the formation of dislocation loops. True False i) Sensitization creates intragranular failure in some high-chromium austenitic stainless steels. True False j) The void swelling occurs mainly in the temperature range of 0.1-0.2T_m where T_m is the melting temperature of material in K. True False

Explanation / Answer

Ans. a) True (Fatigue testing is an example of static test.)

b.) True (Both the mentioned test; Vickers hardness test and micro hardness test act on the same technique.)

c.) False (The driving force of the thermal creep is high temperature, hence when the temperature is high the rate of thermal creep also increases.)

e.) False (Uranium has only three allotropic forms.)

f.) False (Uranium’s melting point is 1132C which is lower than the melting point of UO2 i.e. 2865C.)

h.) True (Void is formed because of dislocation loop.)

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