In a brinell hardness test, a 1500-kg load is pressed into a specimen using a 10-mm-diameter hardened steel ball. the resulting indentation has a diameter = 3.2 mm. (a) determine the brinell hardness number for the metal. (b) if the specimen is steel, estimate the tensile strength of the steel.

a) BHN = 181.606

b) UTS = 635.621 MPa

Explanation:

given,

Load = 1500 kg

steel ball of diameter (D) = 10 mm

resulting indentation diameter (d)= 3.2 mm

brinell hardness number

BHN = 181.606

b) The tensile strength of the steel

UTS = 3.5 (BHN)

UTS = 3.5  x (181.606)

UTS = 635.621 MPa

pe = weightxheight = 2000x1000=2,000,000joules

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.