You are designing a 4340 steel shaft thatis going to be press fit into an 2014 T6 aluminum housing. The 4340 steel rodhas the following properties: E =29 Mpsi, Sy =75 ksi,and the coefficient of thermal expansion (alpha)= 10.8 x 10-6 K^(-1). The2014 T6 aluminum housing has the following properties: E =10.5 Mpsi,Sy =54 ksi,and the coefficient of thermal expansion (alpha)=23.1 x 10-6 K^(-1). Theoperating temperatures range from -30F to 400F. Which of the followingstatements are true? (Note: more than one statement could be true)There is a mismatch between the coefficients of thermal expansion between the steel and aluminum, whichcould lead to problems in the press fit at cold and high temperatures.The yield strength of the aluminum is less than that of steel, which means the aluminum will behave in amore rigid manner than the steel.The elastic modulus of steel is greater than that of aluminum, meaning that the aluminum will behave in abrittle manner while the steel will behave in a ductile manner.

1) Mismatch between thermal coefficients will instead help in this regard. Since Alpha of steel is…

You are designing a 4340 steel shaft that is going to be press fit into an 2014 T6 aluminum housing. The 4340 steel rod has the following properties: E =29 Mpsi, Sy =75 ksi, and the coefficient of thermal expansion (alpha) = 10.8 x 10-6 K^(-1). The 2014 T6 aluminum housing has the following properties: E =10.5 Mpsi, Sy =54 ksi, and the coefficient of thermal expansion (alpha) =23.1 x 10-6 K^(-1). The operating temperatures range from -30F to 400F. Which of the following statements are true? (Note: more than one statement could be true)

You are designing a 4340 steel shaft that is going to be press fit into an 2014 T6 aluminum housing. The 4340 steel rod has the following properties: E =29 Mpsi, Sy =75 ksi, and the coefficient of thermal expansion (alpha) = 10.8 x 10-6 K^(-1). The 2014 T6 aluminum housing has the following properties: E =10.5 Mpsi, Sy =54 ksi, and the coefficient of thermal expansion (alpha) =23.1 x 10-6 K^(-1). The operating temperatures range from -30F to 400F. Which of the following statements are true? (Note: more than one statement could be true)

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter3: The Structure Of Real Materials

Section: Chapter Questions

Problem 3.12P

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