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ConceptCheck7 - 181 Concept Check 7.1 Question Which of the...

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181 Concept Check 7.1 Question: Which of the following is the slip system for the simple cubic crystal structure? Why? {100}<110> {110}<110> {100}<010> {110}<111> ( Note: a unit cell for the simple cubic crystal structure is shown in Figure 3.23. ) Answer: The slip system for some crystal structure corresponds to the most densely packed crystallographic plane, and, in that plane, the most closely packed crystallographic direction. For simple cubic, the most densely packed atomic plane is the {100} type plane; the most densely packed direction within this plane is an <010> type direction. Therefore, the slip system for simple cubic is {100}<010>.
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183 Concept Check 7.2 Question: Explain the difference between resolved shear stress and critical resolved shear stress . Answer: Resolved shear stress is the shear component of an applied tensile (or compressive) stress resolved along a slip plane that is other than perpendicular or parallel to the stress axis. The critical resolved shear stress is the value of resolved shear stress at which yielding begins; it is a property of the material.
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