Engineering, 06.04.2021 04:40 sporting06

Tungsten is being used at half its melting point (Tm≈3,400◦C) and astress level of 160 MPa. An engineer suggests increasing the grain size by afactor of 4 as an effective means of reducing the creep rate.(a)Do you agree with the engineer? Why? What if the stress level were equalto 1.6 MPa?(b)What is the predicted increase in length of the specimen after 10,000hours if the initial length is 10 cm?

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Tungsten is being used at half its melting point (Tm≈3,400◦C) and astress level of 160 MPa. An engin...

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