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hw_2.20090907.4aa5b14fd91145.83816940

# hw_2.20090907.4aa5b14fd91145.83816940 - Name HW 2 Chapters...

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Name: HW # 2 – Chapters 3, 4 & 34 – due Sept 8 th – 28 pts 1. Multiple Choice Question 3.11 in Text p63: 2. Two Brinell Hardness tests (standard steel ball) were undertaken on a new material with the below results – what is its BHN? Test Force (kg) Indentation Diameter (mm) 1 500 4.7 2 3000 9.8 3. (T/F) Tensile strength for low carbon steel and high alloy steel decrease with increased temperature while the opposite is true for ceramics in general: 4. During the hot working of a metal, it is noticed that the strain hardening coefficient approaches zero at about 210°C. What is the metal’s melting temperature (°C)? 5. Problem 3.35 in Text p66 (answer in cP) (converting psi · s to Pa · s is on pg 58, 1psi · s = 6895 Pa · s) 6. Problem 3.36 in Text p66 (ONLY the two parts below) – assume a simple radial variation in velocity. a. Determine shear rate (s -1 - 4 digits): b. Determine shear stress (MPa – 4 digits):

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7. (T/F) With pseudoplastic flow as the shear stress increase the viscosity decreases: 8.
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hw_2.20090907.4aa5b14fd91145.83816940 - Name HW 2 Chapters...

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